BAGIS User`s Manual (Ver 1)
Contents
1. amp Layers Watershed Reference Terrain Reference Q W d amp my NS is Dt S Ov L v Display Selection x gt n al 2286371 344 3420858 744 Meters Figure 6 3 A screen shot of the reference layers in ArcMap 6 1 2 Save AOI MXD This tool saves the current map document to an ArcMap map document file mxd Make sure the file is saved in the intended folder A mxd file stores the layers and their symbologies 6 1 3 Basin Info The tool displays the basic information of a basin Figure 6 4 including minimum and maximum elevation values in the basin and basin area Click OK to dismiss the window Basin New Basin Lowest Elevation 1986 19 meter Highest Elevation 4288 25 Meter Area 4293 04 square km 1802289 34 acre 2816 09 Square Mile Figure 6 4 Basin information dialog window 13 Basin Analysis GIS 6 1 4 AOI Utilities The tool displays the basic information of an AOI Figure 6 5 including minimum and maximum elevation values in the AOI AOI areas and existing user supplied GIS layers of the AOI The shapearea is calculated from the geometry of the AOI polygon The reference area is derived from the attribute table of the forecast point or gauge station the AOI was based upon In addition users can find several useful tools from this dialog window The descriptions of these tools follow Click Close to dismiss the window AOI UCO RioG_SantaFe_R_nr_SantaFe_0920102. A UNCOMPAHGRE R AT COLONA 06112010 AT BASIN 060710 ACTUAL ELEVATIONAL REFRESENTATION Legend Stow Corses f SNOTELSIes Not presented be bw 0 Fepesered __ Motepresentdabore UNCOMPAHGRE R AT COLONA 06112010 AT BASIN 060710 PSEUDO ELEVATIONAL REPRESEN TATION Legend Show Courses SNOTELSIe Not e pre sert di be kw UO Fepesented Notepresentd above Jiunn Der Duh Center for Spatial Analysis amp Research Geography Portland State University 12 31 2010 Contact Information The Center for Spatial Analysis amp Research Geography Portland State University Cramer Hall Rm 424 1721 SW Broadway Portland OR 97201 Tel 503 725 3916 1 800 547 8887 Fax 503 725 3166 Natural Resources Conservation Service National Water and Climate Center 1201 NE Lloyd Blvd Suite 802 Portland Oregon 97232 1274 Tel 503 414 3047 To Mary Greene This project is not possible without her vision and leadership Acknowledgements The development of Basin Analysis GIS BAGIS was funded by the USDA NRCS National Water and Climate Center NWCC through the Cooperative Ecosystem Studies Units CESU National Network Agreement 68 7482 9 534 The Center for Spatial Analysis and Research CSAR at Portland State University provided essential personnel and facility support for the completion of the project Jim Marron Tom Perkins and Gus Goodbody at NWCC were instrumental in the design and refinement of BA
3. a i i i te l l Ao Yvert stares j t j a A u SG i r J a y a iy ayaa ieh p sa da i n pe ct NW Pa pane d f Ariel intofa ing w ti Figure 2 3 ArcGIS Server architecture Figure 2 4 illustrates the various image data services currently available on the CSAR test server These services include DEMs of various spatial resolutions and PRISM precipitation data shown on the left panel of the figure The right panel shows a preview of the PRISM 30 year 1971 2000 average January precipitation data Once the ArcGIS Server infrastructure is established within NWCC or NRCS BAGIS will be customized to have access to the data on the server The server will also be part of the information system used to disseminate basin analysis and watershed forecast outcomes on the internet Y AveCetalog Arcinfo GIS Serweriletcgti on maps goog pareduPRSM 01_Precipitatton imepeServe pe Cit yee Go pi Window bieb 9s a aaner BANSEe OF bocon pars Servet COs OF map Geog poi ed PRM OT Precobsion image ores p gt Contents Prevere Metaciata A E Oi Presta u OPTa Ll Preteen Gi I7_Precgtaton e Aux Srecptaton E Ql_Precotaton g Z Propia a QI Precpitaton OS _Precptaton ae MOJE OF sr a ogeonana com w tesa geo E aa E dA bene tty Covectom ed Coal Calerercoc e Search Pests Figure 2 4 An ArcCatalog screen shot of ArcGIS Server Services 6 Basin Analysis G
4. Create ADI w Automatically snan pournoint Snap Distance 15 Meters w Buffer AGI to clip layers Buffer Distance 1000 Meters Figure 6 23 The Create AOI Tool interface After the AOl s mask has been created it is displayed on the map Figure 6 24 and a message box is activated prompting the user to either verify or reject AOI boundaries Figure 6 25 Area values for both the AOI mask are projected in this message box along with a referenced area value captured from the Gauge Station layer If rejected the tool reverts back to Set Pour Point tool otherwise it proceeds to clip all layer associated with that AOI BAGIS shows a message window to inform the progress of the process Figure 6 26 Figure 6 27 show an AOI and its associated layers created by the Create AOI tool 24 Basin Analysis GIS Untitled ArcMap Arcinio Sie Hot Wes Boothe foit Sdn ook iron te nes A rosa amp 0 gt N Bann frail Y nays ans Mapa Wesel rere Fa D Mw maroc al amp Tere tes AA n PA Seen DEM Ext ye BOrv a t RI Fi Accondiyon Van Hoh 4 1599 14e4 N I my y Ar de we oe 1K00816 453 1741930 495 Meters Figure 6 24 AOI boundaries delineated by BAGIS The area of AGI is 1815 33 Square Em 440576 21 Acre 700 90 Square Miles Reference area for ACI is 697 00 Sq Miles Do you want to use this AOI boundary Figure 6 25 Image displays the message box prompting
5. 4 LINO aaa aiar 7 Bia SV em DOCU icaro 7 4A S Glo Data Prepara El OU aaa danni 8 5 Work pce File Str UCCUTOS serais inn eee ee ee a eee ee eee ere 10 Ce MOU ana 11 6 1 Basin Analyst Tools Menini 12 GZ Basih WOO 1S IV OCC orr a E EN EE A EA OREN A A 17 SEO 0 AV ARR RR EE A E EE OEE 21 6 4 Basin Analysis and Maps TOols ssesecsosesscscsssscnsoussectenssscneusssenecussesteusssensossessoussseneusssensuusrense 26 TV OLIVE Wha GIS VS Oa rccersthae aut toe ce carnnesst eeu eeecte su aineen Gee dine si amaaebotacteed este sheeesacenoansueeemiatacaeaneiee 36 8 Using BAGS IAT CGIS 10 race 38 9 Creating AOls for Endorheic Closed Watersheds cc cssssecccccesseecceeeeeeeecceeeeeeeeeeeseeeeeeeeesseeeeeeeeeseenes 38 Appendix A Basin Analysis GIS BAGIS Input Data Dictionary 40 Appendix B Table columns in Excel spreadsheets generated in Basin Analysis 53 Appendix C Excel Charts Generated in BAGIS iii 57 Basin Analysis GIS BAGIS User s Manual Version 1 July 4 2010 1 Introduction Basin Analysis Geographic Information System BAGIS was developed by the Center for Spatial Analysis and Research CSAR at Portland State University and the National Water and Climate Center NWCC at USDA Natural Resources Conservation Service USDA NRCS BAGIS provides a set of GIS tools for organizing watershed analysis input and output data streamlining basin analysis process and creating an easy to
6. edu Figure 6 7 Basic BAGIS development information 16 Basin Analysis GIS 6 2 Basin Tools Module The Basin Tools module Figure 6 8 has three major tools 1 Basin Tool 2 Set DEM Extent and 3 Clip DEM These tools are used to 1 designate a parent folder to save the data 2 locate an area of interest containing the target basin boundaries and 3 generate clip and save supporting data layers Basin Analyst X ar oe g New Basin Re Pe gk animas_1_at_durango_07282010 Analysis and Maps Figure 6 8 Location of Basin Tools outlined in red within basin analysis model toolbar 6 2 1 Basin Tool The Basin Tool menu bar item 9 is used to designate the location of the basin s parent folder It opens up the Basin Tool dialog window Figure 6 9 Users can locate a folder to store basin data by clicking on the Open button within the Basin Tool s dialog window and navigate to a desired folder s directory Figure 6 10 User can create a new folder and rename it with this folder selection dialog window If a new name is given make sure to reselect the folder with the new name to continue Basin Tool x Open E NRCES GIS Basins UCO Select New Subfolder DEM 30 meters DEM O View Layers ADI No Close Sub Folders Double click to change folder DEM Status AOI Status a Parent Folder gt eagle_r_bl_gypsum 30 meters DEM oUt Mo naonla_ reservoir 30 meters DIEM roaring_fork_at_glenwood_sprin
7. x DEM Path E NRCS GIS Basins UCOUCO RioG_SantaFe_R_nr_SantaFe_092010 outputisurfaces demfilled PRISM Path ENRCSA GIS Basins UCO MUCO RioG_SantaFe_R_nr_SantaFe_092010 lavers PRISM Layers Path E NRCS GIS Basins UCOUCO_RioG_SantaFe_R_nr_SantaFe_092010 avers Elevation Stats Shape Area Reference Area In 2353 36 47 38 square km 18 20 5q Miles 3764 87 Meter 11707 47 4cre 1441 51 Meter 18 729 Square Mile Set AQT Presence of User s Layers in ACI Presence of BAGIS Layers Selected Clear Selection Add Selections To Map Mv PRISM Layers r Raster Layers Vector Layers SNIOTEL E aspects aoi_streamns ie r covdens counties 2001 Snow Course cov den federal lands _albers sliced_facc FSRoads_Albers Re clip Selected Layers west_covtype snotel_sites SNOWCOUPse sites state boundaries Add A New Layer streams _albers waterbodies_albers wilderness albers Update Weasel Info Close Figure 6 5 AOI information dialog window Set AOI Tool The Set AOI tool allows users to select an existing AOI without needing to select a basin first This tool acts as a short cut to AOls and allows AOls to be independent from any basin Once an AOI is set users can proceed to do basin analysis see Section 6 4 Re Clip BAGIS Layers Tool When an AOI was created several BAGIS internal layers including PRISM precipitation SNOTEL points layer and Snow Course points layer were clipped to the AOI folder and are ready to be
8. AOI tool These components are used to 1 select a Gauge Station of interest 2 set the pour point of that Gauge Station location and 3 generate an AOI based on the Gauge Station s watershed Basin Analyst X Basin Analyst dl A a New Basin Re Pe oof animas_i_at_dutango_07282010 Figure 6 17 Location of AOI Tools outlined in red within basin analysis model toolbar 6 3 1 AOI Tool The AOI Tool a uses an interface that manages the AOls located within a basin Figure 6 18 A user has the ability to generate a new AOI with the New button or if AOls exist in this basin they can select a previously generated AOI with the Select button view its components with the Layers button or delete it with the Delete button 21 Basin Analysis GIS AOI Tool AGIs in New Basin animas r_at durango 07282010 e RM MO Sen LJ Layers CITI oo Delete Close Figure 6 18 AOI Tool dialog window When a user chooses to generate a new AOI the AOI Tool dialog window will close and a new interface will open Figure 6 19 This new window is designed to allow the user to view and select a Gauge Station that will act as the AOI s pour point based on either its location or Station ID the name field designated in the System Configuration Module settings Untitled ArcMap Arcinto Core Reservoir Inet s f pa Anas and Maps Y Vallecito Reservoir Inflow 2 View Basir i Lemon Reservo
9. Seamless Server Roads Seamless Server Streams Seamless Server National Atlas The National Map Waterbodies Waterbodies Seamless Server amp monthly prep data Grid Raster Pn rr ee existing Proposed Beemer NCS a Weasel Service roads in National http svinettc4 fs fed us ve Roads Forests ctorgateway index html Forecast points 41 Basin Analysis GIS Data Name DEM 10 Meters Western US File Names mtwy_10p ndsd_10p orwa_10p se_10p sw_10p 5 separate raster files File Folder GIS Static 10_meter File Type ESRI GRID Geometry Raster Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes 1 Rasters downloaded by Lat Long from URL 1 x 1 2 2 Mosaicked into overlapping large raster datasets 3 Reprojected to USA _Contiguous_Albers_Equal_Area_Conic_USGS_version Attributes This raster does not have an attribute table Thumbnail image 8 Layers ca ve _10p Valve High 4414 23 Low 5856151 3 0 sel0p Value High 4853 9 Low 7 37129 p owa iip Valie High 439417 Low 9 25259 SM ndsu_10p Value bdegh 4017 37 Low 227 239 RI mtay_10p Value High 4232 62 L cw 271 337 a Display Source Selection an en i gt 42 Basin Analysis GIS Data Name DEM 30 meters Alaska File Name ak30_albers File Folder Projects NWCC GIS Static AK_30_albers F
10. drive or network drive e g the NWCC local file server S drive the static data could be stored ideally on a centralized ArcGIS Server via the Internet A temporary testing ArcGIS Server was set up in CSAR at PSU for testing GIS web services The test results indicate that ArcGIS Server approach is a feasible solution for building future GIS Server infrastructure within USDA The server was built on a Dell server PowerEdge T110 running Microsoft Windows Server 2008 R2 64 bit The server uses Windows Internet Information Services IIS to provide web i e http service that handles requests over the internet The web service sends GIS server requests to ESRI s ArcGIS Server which depending on the types of request feeds data retrieved from the GIS database to the end users in various formats such as raster images or vector features The ArcGIS Server architecture provides an industrial standard solution to manage and disseminate GIS data on a local area network as well as over the Internet The end users could view the data with a web browser or analyze the data in GIS e g ArcMap A diagram of the ArcGIS Server architecture is shown in Figure 2 3 4 Basin Analysis GIS Figure 2 2 Water forecast locations and AOls created from them 5 Basin Analysis GIS te F ni x Diae tn C J l i d af i horn sssca N _ fear aS Serve x i gt j na L ber Mr i ove Bar 9 ut ry 9 lt gt Ay i
11. generate subfolders of basins and areas of interest AOls These folders have predefined structures generated and used by the BAGIS model Fig 5 2 Users must not modify these model s file structures User s File Structure co cs a Figure 5 1 Basin analysis main file structure that could be redefined by users Model s File Structure Basin amp AOI weasel compatible Figure 5 2 File structures of Basin and AOI defined by the model not by the users 10 Basin Analysis GIS A basin folder is a folder containing a filled i e depression less DEM and its derived surface layers including slope aspect flow direction and flow accumulation Users must select or create a basin folder to start the basin analysis process Once a basin folder is specified users can then create AOls based on pour point locations within the geographic boundaries of the basin An AOI folder is a folder containing a filled DEM and its derived surface layers the same as a basin AOI layers delineating the watershed boundaries of the AOI and additional participating layers used in basin analysis Users must select or create an AOI folder to do basin analysis Once a basin folder is specified users can generate maps showing the geographic representation of SNOTEL and Snow Course sites within the AOI Since an AOI folder has an identical DEM file structure as a basin folder it is possible to create sub AOls within existing AOls 6 Mo
12. o t Blueindicates required fields Eros als tate Supplemertal forest_Density cov den Raster E ARCSVGIS State SupplementaliLand_Cover MLCOZ001 west _Covtype Raster E 1a SESS Su Hs lands DSC Shapefile Figure 6 6 The System Settings interface topographic reference data highlighted in Yellow analytical reference highlighted in Red and participating highlighted in Green Once all of the data sources have been set in the System Configuration Module the user must click on the Save Settings button in order to save their settings data This writes a definition file in a temporary folder that BAGIS will read every time it is started An Undo Edit button was added to the System Configuration Module interface to allow the user to undo any modifications they make with the System Configuration Module 6 1 6 About This menu item displays the BAGIS development information in a dialog window Figure 6 7 Click any when in the dialog window or the upper right cross to close the window Abow Basin Analysis GIS DAGIS Basin Analysis GIS Ver 1 0 7 4 2010 Release 1F 12 31 2010 ARCS National Water and Climate Center NWCC amp Center for Spstial Analysis amp Research CSAR Geography Portland State University Spatial Services 2010 Funded through Cooperative Ecosystem Studies Units CESLI National Network Agreement WOC Contact Jim Marron fim marron por usda gow PSU Contact Jiunn Der Geoffrey Duh jduh Gods
13. reappears Click Done to continue 9 Follow the prompt to reuse the layers created in BAGIS 10 GIS Weasel now has successfully opened the AOI created in BAGIS for subsequent analysis 8 Using BAGIS in ArcGIS 10 BAGIS tool has two different versions for ArcGIS 9 x and ArcGIS 10 This is because ArcGIS 10 uses a different framework for managing map template files than ArcGIS 9 x The source code of BAGIS is stored in a map template ArcGIS 10 no longer use a map template file mxt to set a user defined map template Instead it uses a regular version 10 map document mxd You should use the matching version of BAGIS Both versions of BAGIS have identical functions and VBA codes When using the version in ArcGIS 10 you can either double clicking the mxd file to start the model or copy the mxd to user s ArcGIS 10 template folder and use the new document option to select the BAGIS template The ArcGIS 10 template folder usually is at C Users account_name AppData Roaming ESRI Desktop10 0 ArcMap Templates You can find the path to the template folder on your computer by selecting New from the File menu in ArcMap and clicking on the blank map The path should appear toward the bottom of the dialog window 9 Creating AOIs for Endorheic Closed Watersheds An endorheic or closed watershed is a drainage basin from which there is no outflow of water Such watersheds are usually surrounded by terrain barriers that keep water in enclos
14. the user to verify or reject the AOI s mask Basin Analysis Message Creating AQL PA Clipping DEM layer step 1 of 29 Figure 6 26 A message window showing the progress of AOI preparation process 25 Basin Analysis GIS File Edt Yew Bookmarks Insert Selection Toots Window Heb beds a gt d Basi fast I BI 01495_os200010 DO Surdi DEM Extent RI khs Value High 254 i 5 RI Fow Accumustion vka Higi 1 941139 Lom lt 0 Figure 6 27 The boundaries and hillshade layers of an AOI watershed created with the Create wy J Sifas fo 21 Bae A Oo ey 377804908 2570480 977 Meters fazio S OOS ee P A Anshess and Mace 7 y AOI Tool 6 4 Basin Analysis and Maps Tools The Basin Analysis and Maps tool menu include the Create AOI Streams Elevation Scenario map export and several map display tools Figure 6 28 These tools are designed to provide further analysis AOI data layers amp E E 999 9 EE Create AGI Stream Generate Maps Elevation Distribution Elevation SNOTEL Elevation Snow Courses Precipitation Distribution Aspect Distribution Slope Distribution Elevation Scenario Actual Representation Pseudo Representation Export Map Figure 6 28 Basin Analysis and Maps tools menu 26 Basin Analysis GIS 6 4 1 Create AOI Streams The Create AOI Streams tool converts the flow accumulation raster laye
15. use interface for producing analysis maps and tables It is the latest addition to the state of the art information systems for supporting hydrological analysis and water forecast modeling BAGIS was tailor made for the NWCC forecasters and water resources managers in USDA to perform four major functions 1 Basin Preparation This function extracts the DEM to a basin folder and generates derived surfaces of the DEM including a filled DEM slope aspect hillshade flow direction and flow accumulation layers 2 Area of Interest AOI Delineation An AOI is the unit for a basin analysis The data used in a basin analysis are stored in an AOI folder This AOI delineation function allows NWCC water forecasters to identify a watershed pour point location and use the location to delineate a watershed or catchment boundary 3 Basin Analysis This function generates diagrams and tables in the form of excel spreadsheets indicating the geographic representation of SNOTEL and snow course sites with respect to elevation and precipitation distributions The information is used to identify new SNOTEL sites that could improve the accuracy of water forecast in AOls 4 Map Compilation This function produces a set of maps used in basin analysis reports Users of BAGIS should have basic operational knowledge of ESRI ArcMap GIS software 2 Background Water forecast is one of the major tasks performed at the USDA NRCS National Water and Climate Cente
16. wish to classify the DEM into This can be done by clicking on the dropdown list next to the Interval tab and then clicking 1 Apply The list box below will then become populated providing the percent of the DEM s area and number of SNOTEL and Snow Course sites for each elevation interval range The elevation subdivision on elevation curve parameter allows the user to create a detail elevation curve on the charts The subdivided intervals are not used in analysis A second reclassification is made to the precipitation data in the Precipitation Distribution Map data frame mid right of the window This function allows the user to choose a predetermined or custom interval scheme from the dropdown list next to the PRISM Data tab If a user chooses a custom interval scheme then the dropdown lists entitled From and To will become active allowing the user to custom pick target months After the 28 Basin Analysis GIS precipitation data has been selected the user must then click the 2 Get Range button to get the summary statistics of the compiled PRISM precipitation data The user can then provide an interval in the Precip Zone Interval Inches text box This interval will be used to reclassify the PRISM data into precipitation zones The precipitation zones will then be populated to the Precipitation Zones list box after the user clicks on the 3 Apply button Once the elevation and precipitat
17. 13 5 2367 2 4 2421 1 874885 5 21 93291092 21 93291092 0 21 93291092 O 21 93291092 1 449275362 2367 3 2421 5 2474 8 1 874885 5 22 30121231 22 30121231 O 22 30121231 0 22 30121231 1 449275362 2421 1 2474 8 6 2528 6 14 12248397 22 76148415 24 65841293 1 896928787 23 51454544 0 532292604 329 2036133 20 28985507 2474 9 2528 6 7 25824 18 15747939 23 51667976 25 63058281 2 113903046 24 29165459 0 617766321 437 2497864 26 08695652 2528 7 2582 4 8 2636 2 13 11373512 23 74157524 27 04781532 3 306240082 25 11686897 0 865966797 326 5192871 18 84057971 2582 5 2636 2 9 2690 9 7873969 5 23 75693512 27 32259941 3 565664291 25 15503502 1 098495126 226 3953094 13 04347826 2636 3 2690 10 2743 8 3 2624656 5 26 39895058 27 86654472 1 467594147 27 36620712 0 68408972 82 09861755 4 347826087 2690 1 2743 8 11 2797 6 2 1749771 28 42652321 29 16862488 0 742101669 28 79757309 0 371050835 57 59514618 2 898550725 2743 9 2797 6 12 2851 4 2 1749771 29 8323288 29 97971153 0 147382736 29 90602112 0 073691368 59 81204224 2 898550725 2797 7 2851 4 13 2905 2 1 874885 5 30 08638763 30 08638763 0 30 08638763 0 30 08638763 1 449275362 2851 5 2905 2 14 2959 1 874885 5 31 20816612 31 20816612 0 31 20816612 0 31 20816612 1 449275362 2905 3 2959 15 3012 8 2 1749771 32 04771042 33 20067978 1 15296936 32 6241951 0 57648468 65 2483902 2 898550725 2959 1 3012 8 16 3228 1 874885 5 34 9924736 34 9924736 0 34 9924736 0 34 9924736 1 449275362 3174 3 3228 Figure 6 32
18. A screenshot of an Excel spreadsheet generated in BAGIS 29 Basin Analysis GIS Precipitation Distribution Precipitation Distribution 2 3 4 5 6 7 15713 091 14713 091 14713 091 13713 091 13713 091 12713 091 12713 091 11713 091 a T 11713 091 10713091 j 5 10713091 F E 9713 0906 E g 3713 0906 4 z 8713 0905 8713 0906 7713 0906 ita 6713 0906 6713 0906 5713 0906 5713 0906 Elevation Distribution Elevation Ah Snow Course Ah SNOTEL E Frecipitation Figure 6 33 An example of the precipitation distribution chart of an AOI Table 6 2 Excel spreadsheets created in basin analysis full elevation range in AOI Spreadsheet Description Associated Chart s Name Charts Charts of the data spreadsheet see N A Table 5 4 Area Elevations Area distribution of elevation zones Precipitation distribution of elevation Precipitation Distribution and zones Precipitation Distribution combined with SNOTEL and Snow Course Slope distribution of AOI Slope Distribution Aspect distribution of AOI Aspect Distribution Snow Course Area distribution between Snow Snow Course and Precipitation Course sites at different elevations Distribution combined with SNOTEL and Snow Course SNOTEL and Precipitation Distribution combined with SNOTEL and Snow SNOTEL Area distribution between SNOTEL sites at different elevations Course Area distribution of subdivided Curve elevation zones distributions 30 Basin A
19. ES ae amp n e x d el or 2 44 at i wu x A ye v Snow Course Representation Sr Coumer CASCADE CASCADE 7 E grut mountan COLUMBUS BASIN RED MOUNTAIN PASS Not represented Figure 6 36 Snow Course elevation representation map in a selected AOI 6 4 6 Precipitation distribution map ROARING FORK AT GLENWOOD SPRINGS S ATUCO SMALL PRECIPITATION DISTRIBUTION Precipitation in inches Snow courses SNOTEL Stes 14 41 16 18 29 2 24 SKEEtSERKBEES EEEREN Figure 6 37 Precipitation distribution map in a selected AOI 33 Basin Analysis GIS 6 4 7 Aspect distribution map Aspect animas_r_at_durango_ 07282010 at New_Basin Figure 6 38 Aspect distribution map in a selected AOI 6 4 8 Slope distribution map Slope paonia_reservoir at UCO Percentage Shae E nz 25 23 Si su 7 73 0 0 6 tt me Figure 6 39 Slope distribution map in a selected AOI 34 Basin Analysis GIS 6 4 9 Elevation Scenario This tool allows the user to estimate the area in an AOI not represented by existing SNOTEL or snow course sites The tool calculates the actual non represented areas and pseudo non represented areas using elevation data entered by the user Areas with an elevation higher than the highest site s or lower than a user specified elevation range below the lowest site s are deemed non represented by the monitoring sites After the calculation
20. Fiow Direction mi Figure 6 21 Image portraits a dot graphic generated by the Set Pour Point tool in Green and pour point in Red 23 Basin Analysis GIS Figure 6 22 A close up view of the selected pour point location indicated by a green cross hair marker The white pixels are locations with high flow accumulation values Pour points should be set on these locations 6 3 3 Create AOI Tool The Create AOI Tool is used to generate an AOI boundary that will be used to clip out supporting data layers to the AOI folder The tool has two functions that can be applied within its initial dialog window Figure 6 23 The first function allows the user to automatically snap the pour point to the area with the highest flow accumulation within a given distance Users can deactivate this function by either setting the Snap Distance to zero or by deselecting the Automatically snap pour point option The second function determines if and at what distance the AOI should be buffered before initiating the clipping sequences Users can deactivate this function by either setting the Buffer Distance to zero or by deselecting the Buffer AOI to clip layers option Please note that the PRISM precipitation layers are clipped to the AOI with a 1000 meter 1 Km buffer to prevent missing data in the later analysis After customizing these functions the AOI layer mask can then be created by clicking on the Generate AOI button
21. GIS The huge amount of GIS data used in basin analysis were compiled by PSU Geography students Ray Hennings and Donald Waldo under the supervision of Mr David Banis Ray also used BAGIS to create GIS layers for more than 600 areas of interest that were used in water forecasting at NWCC Geography graduate student James Manzione contributed many VBA codes to BAGIS also want to thank Drs Heejun Chang and Joe Poracsky for their comments and guidance during the course of the project Geoffrey Duh Portland Oregon BASIN ANALYSIS GIS BAGIS DISCLAIMERS THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES LOSS OF USE DATA OR PROFITS OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY WHETHER IN CONTRACT STRICT LIABILITY OR TORT INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE Table of Contents LIMNFOGUC ilari 1 DICKS OC a 1 3 System REQUIRES liceale 7 4 Installation System Setup and Data PreparationN i 7
22. IS 3 System Requirements BAGIS was developed in the ArcMap Visual Basic for Applications VBA environment VBA allows full access to ArcObjects the core computational module and building blocks of ArcGIS and provides a flexible graphic user interface GUI customization capability These aspects of VBA are essential for NWCC s basin analysis which requires reliable and efficient data processing functions and a streamlined GUI for organizing complex tasks The current version Ver 1 was developed and fully tested on ArcGIS versions 9 X and 10 To use BAGIS the computer system must have the following software packages installed e ArcMap 9 X or later with Spatial Analyst extension and VBA capability e Microsoft Excel 2007 or later 4 Installation System Setup and Data Preparation 4 1 Installation Basin Analysis GIS Tool BAGIS was distributed as an ArcMap map template file BAGIS_VerXX mxt for ArcGIS 9 X Users only need to copy the file to their hard drive and double click it to start the model Please refer to Section 8 for instructions on using BAGIS in later ArcGIS version e g ArcGIS 10 4 2 System Setup The first time you start BAGIS you must specify the model settings data First look for the BAGIS Toolbar If it is not displayed then go to View Toolbars on the ArcMap main menu and check the Basin Analyst toolbar Once the toolbar appears click the Basin Analyst menu and select Options to set up BAGIS analysis en
23. Lands File Name indian_lands_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polygon Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes 1 Overlapping shapefiles downloaded from the URL 2 Merged downloaded shapefiles 3 Clipped to Western States Boundary 4 Reprojected to USA Contiguous Albers Equal Area Conic _USGS_ version Attributes OID Internal feature number ___ ADMINISTRAT Stins 5 Thumbnail image e Leyers E mon be srn M cutter Merge ote del I s x c VED La i 7 xs a s 9 boa a x haga p ews Te ie we ha 47 Basin Analysis GIS Data Name Land Management Wilderness File Name wilderness_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polygon Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes Overlapping shapefiles downloaded from the URL i oe Attributes Merged downloaded shapefiles Clipped to Western States Boundary Reprojected to USA_Contiguous_Albers_Equal_Area_Conic_USGS_version FID AGBUR URL NAME String 80 Name of the wilderness area STATE String 14 Two character state code STATE_FIPS String 14 Two chara
24. Pseudo representation map 6 4 12 Export map tool 6 1 Basin Analyst Tools Menu The Basin Analyst Tools menu Figure 6 2 has six tools 1 Add Reference Layers 2 Save AOI MXD 3 Basin Info 4 AOI Info 5 Options and 6 About These tools provide general utilities of BAGIS Add Ref Layers Save ACT MSD i Basin Info AOI Utilities a Options About Figure 6 2 Basin Analyst tools menu 6 1 1 Add Reference Layers Users can load Terrain Ref Drainage Ref and Watershed Ref layers into ArcMap map frame when selecting this item Figure 6 3 These reference layers are specified as ArcGIS layer files lyr and used only as a reference for selecting study sites They are not involved in any analysis The Terrain Ref layer could be a shaded relief map showing the terrain relief The Drainage Ref layer could be a line map showing the river network The Watershed Ref layer could be a polygon map showing the boundaries of major watersheds The reference layers are specified in the system settings dialog window see 6 1 5 If no reference layer is specified the tool does nothing This tool has identical function as the Add Ref Layers to Map button on the system settings dialog window 12 Basin Analysis GIS 2 Untitled ArcMap ArcInfo BAHA File Edit View Bookmarks Insert Selection Tools Window Help Dede exe MEON Basin Analyst a 9 TR ge hig ta we csi ai Analysis and Maps Y f af
25. RL 2 Merged downloaded shapefiles 3 Clipped to Western States Boundary 4 Reprojected to USA Contiguous Albers Equal Area _Conic_USGS_ version Attributes FID left of the arc right of the arc Thumbnail image 50 Basin Analysis GIS Data Name National Atlas Water Bodies File Name waterbodies_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polygon Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes 1 Overlapping shapefiles downloaded from the URL 2 Merged downloaded shapefiles 3 Clipped to Western States Boundary 4 Reprojected to USA Contiguous Albers Equal Area _Conic_USGS_ version Attributes String 80 Name of the water feature Thumbnail image in DR arden Lif 51 Basin Analysis GIS Data Name USFS Service Roads File Name FSRoads_Albers shp File Folder Projects NWCC GIS Static Supplemental FSRoads File Type ESRI shape file Geometry Lines Data Source FSGeodata Clearinghouse Download URL http svinetfc4 fs fed us vectorgateway index html Metadata URL http svinetfc4 fs fed us metadatagateway explorer jsp Processes 1 Overlapping shapefiles downloaded from URL by manually selected extent 2 Shapefiles unpacked using 7 Zip 3 Merged individual shapefiles into single shapefile 4 Reprojected to USA_Contigu
26. aries of this basin may be cited by reference maps selected and applied in the System Configuration Module After creating the extent the Clip DEM tool will then become active Untitled ArcMap Arcinto Fila gn yew Gockmarke Jreart Selection Too yind tip DSHS ax span gt yiaeorw sean teat DE ol ye d Aaah ard taps a RI Watershed Reference CJ A Terran Reference Pe Bere bit a Dt an cla aar A gt Or Bo ee BASH S42 1634419 120 Makers Figure 6 13 Image portraits the rectangular graphic extent generated by the Set DEM Extent tool 19 Basin Analysis GIS 6 2 3 Clip DEM Tool The purpose of the Clip DEM Tool 2 is to reduce the processing time of analytical operations by reducing the extent of the data properties and providing a data library for AOI automation The Clip DEM Tool dialog window Figure 6 14 allows the user to specify the resolution of the DEM input Source DEM before clipping it to the rectangular graphic extent generated by the Set DEM Extent tool This clipped DEM will then be used to generate a series of Output Layers that can be viewed upon the completion of the clipping process Users can select specific or all layers with the All button to view before initiating the clipping procedures via the Clip button The Hillshade Z factor parameter allows users to adjust the elevation exaggeration effects on the output hillshade layer A value of 1 is suitable for m
27. ayer files before you start using BAGIS The reference maps are labeled as terrain drainage and watershed layers but users can use any layer files available Digital Elevation Model DEM and gauge station or forecast point location data for AOI delineation and basin analysis At this point BAGIS uses only two DEM datasets 10 meter and 30 meter resolution Users must verify the elevation Z unit either in meters or feet of the data and correctly specify the unit in the BAGIS Settings Gauge station location data set which stored as a point shapefile is used as a reference for selecting pour points for AOI delineation The gauge stations or forecast points layer must have a text attribute field containing the name of the station Optionally the data can have an area field containing the upstream or catchment area of the station The area value is used to verify the AOI area created by BAGIS if the field is specified In this case users must also specify the unit of the area values SNOTEL and Snow course point shapefiles Both data sets must have a numerical attribute field containing the elevation in feet or meters of the site locations Optional they could have a text field indicating the name of the site location PRISM precipitation based on 30 year averaged data including annual quarterly and monthly data stored as ESRI grid raster format The folder containing PRISM data must have 17 folders i e Jan Feb Mar Apr May J
28. ce locations for data by clicking on the Set button for each layer and navigating to the file directly The caption of the dialog window indicates the file name and folder the setting information is stored There are three groups of data layer settings The first data group yellow box pertains to the topographic reference data layers that can be used to incorporate location information to the map Figure 6 6 highlighted in Yellow These raster layers are optional and will not be used for cartographic or analytical purposes however they do provide an excellent means of identify basin locations for analytical purposes Users can load these layers to the map by checking the Add Ref Layers to Map button These layers include Terrain Ref Drainage Ref and Watershed Ref layers Users can double click on the text fields to clear the setting The second data group red box relates to the analytical reference layers that will be used as data sources for BAGIS Figure 6 6 highlighted in Red Each of these sources are required as they provide reference to terrain elevations station locations and precipitation data Users are required to identify the preferred DEM resolution 10 or 30 meter each layer s elevation unit meters or feet the gauge station s area unit and field and the elevation field and name field for each shapefile The third group green box relates to the participating layers that will be clipped dur
29. cter FIPS state code Thumbnail image String 7 Code for owning or administering String 150 Uniform Resource Locator CAF Ot p a abe f P tc 3 Ra x CASA it 48 Basin Analysis GIS Data Name National Atlas Roads File Name roads_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polyline Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes Overlapping shapefiles downloaded from the URL i os oe Attributes Merged downloaded shapefiles Clipped to Western States Boundary Reprojected to USA_Contiguous Albers Equal Area Conic_USGS version LPOLY_ Number 11 Internal number of the polygon to the left of the arc FID RPOLY_ Number 11 Internal number of the polygon to the right of the arc Thumbnail image P Laren r E ty my res ik magnate amp a a E pS a e nn s D WE P ey he fe ac adr te T a kE aa rp Ne da di 49 Basin Analysis GIS Data Name National Atlas Streams File Name streams_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polyline Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes Overlapping shapefiles downloaded from the U
30. dules The model has five major modules 1 System configuration 2 Basin Tools 3 AOI Tools 4 Basin Analysis Tools and 5 Mapping Tools These modules are organized in ArcMap s graphic user interface GUI as menus and buttons on a toolbar Figure 6 1 that guides users through the logical sequence of basin analysis Basin Analyst Figure 6 1 Basin analysis model toolbar Once a user has finished the initial system setup Module 1 every time he or she uses the model they must select or create a basin Module 2 and then select or create an AOI Module 3 to continue with basin analysis Table 6 1 lists the individual functions of BAGIS Detail descriptions of these functions follow Table 6 1 An overview of BAGIS functions 6 1 Basin Analyst menu Add Reference Layers Save AOI map document mxd Show basin information Show AOI information System settings About BAGIS 6 2 Basin tools Select Basin tool Set basin extent tool Clip DEM tool 11 Basin Analysis GIS 6 3 AOI tools Select AOI tool Set pour point tool Create AOI tool 6 4 Analysis and maps menu 6 4 1 Create AOI stream tool 6 4 2 Generate Maps tool 6 4 3 Elevation distribution map 6 4 4 SNOTEL elevation representation map 6 4 5 Snow course elevation representation map 6 4 6 Precipitation distribution map 6 4 7 Aspect distribution map 6 4 8 Slope distribution map 6 4 9 Elevation scenario tool 6 4 10 Actual representation map 6 4 11
31. eated for all forecast points in a BASIN PSU creates the AOls The location of the forecast point i e the pour point of the AOI watershed is determined based on the maps published on the USGS Water data site information webpage http waterdata usgs gov nwis si The area of AOI is verified using the area information published on the same webpage NWCC might provide additional GIS layers showing reference AOI boundaries When the AOI delineation is completed PSU submits a map showing the AOI boundaries and a table of the AOI areas to NWCC for review 7 AOI Verification NWCC reviews the AOI boundaries PSU conducts basin analysis for the delineated AOls 3 Basin Analysis GIS A total of twelve basins Step 4 outcomes and 601 AOls Step 6 outcomes were created They occupy a disk space of around 700 GB Table 2 2 The geographic locations of the AOls as well as the forecast points used to delineate the AOls are shown in Figure 2 2 Table 2 2 Asummary of the AOls created in BAGIS for water forecast at NWCC Delivered Region Disk Size m a Koot_Po_Spok asf 873 na South cost 12 490 Decio total Sor oos o The complete database for basin analysis for the US western states input static files only and AOI output files requires an estimated disk space of around 1 TB or 1000 GB including 300 GB of static data and 700GB of AOI data Though the AOI data must be saved to a logical local drive e g C
32. ed hydrological systems When delineating the AOI of a closed watershed users must use 38 Basin Analysis GIS the lowest point in the watershed as the pour point and the lowest point on the DEM must contain a NODATA value When selecting the pour point in BAGIS users must click on the DEM grid cell that is NODATA and disable the snap option when generating the AOI boundaries If the DEM has not be preconditioned then you need to find the lowest points in endorheic watersheds and set the DEM cell values on these locations to NODATA The ArcGIS software interprets the NODATA cells as watershed outlets so that these endorheic basins are not labeled as sinks of the terrain and get filled when the software tries to maintain the proper hydrological properties of the terrain by filling the sinks On a regular DEM that is not preconditioned to location the terminals of the endorheic drainage systems the endorheic watersheds are filled and merged with their neighboring watersheds resulting in an erroneous delineation of the AOls Users can follow the instructions below to precondition the DEM Users are expected to know ArcMap well enough to implement the procedures Please contact your IT staff if you have any question on using ArcMap 1 Create a new point shapefile in ArcCatalog using the same coordinate system as the DEM You use the shapefile to keep track the lowest locations of all closed basins in your forecast areas 2 Locate the
33. er does not have an attribute table Thumbnail image amp layers 84 BC_AE M cindai olo Value High S421 Low 03 44 Basin Analysis GIS Data Name DEM 30 Meters Western US File Names westus_30 File Folder GIS Static DEM 30MDEM File Type ESRI GRID Geometry Raster Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes 1 Small rasters downloaded by Lat Long from URL 2 Mosaickedinto single large raster dataset 3 Reprojected to USA _Contiguous_Albers_Equal_Area_Conic_USGS_version Attributes This raster does not have an attribute table Thumbnail image Value High 4412 85 Low 85 6187 45 Basin Analysis GIS Data Name Land Management Federal Lands File Name federal lands_albers shp File Folder Projects NWCC GIS Static Supplemental File Type ESRI Shapefile Geometry Polygon Data Source The National Map Seamless Server Download URL http seamless usgs gov index php Metadata URL http seamless usgs gov index php Processes Overlapping shapefiles downloaded from the URL 2 Merged downloaded shapefiles 3 Clipped to Western States Boundary 4 Reprojected to USA Contiguous Albers Equal Area Conic_USGS version Attributes FID OID Internal feature number O Z o o Thumbnail image 46 Basin Analysis GIS Data Name Land Management Indian
34. gs 30 meters DEM taylor_park_0 30 meters DEM taylor_park_100 30 meters DEM taylor_park_ 1000 30 meters DEM taylor_park_1300 30 meters DEM taylor_park_400 30 meters DEM taylor_park_ 700 30 meters DEM Figure 6 9 The Basin Tool dialog window Once a parent folder is selected all subfolders located within this folder will be visible in the List Box Subfolders can be selected as the new parent folder by double clicking on them This will change the Path Directory and repopulate the List Box with the folders that are contained within that subfolder Users can create a new subfolder within the parent directory by clicking on the New Subfolder button If a user wishes to return to the previous parent folder they can do so by double clicking on the lt Parent Folder gt item in the List Box 17 Basin Analysis GIS Select Basin Folder Show of type Catalog location Cancel Figure 6 10 Folder selector for selecting a basin folder The Basin Tool window Figure 6 9 indicates if the parent folder contains either DEM or AOI data below the Path Directory This information is replicated for the subfolders in the DEM Status and AOI Status columns of the List Box A parent folder may be selected for use by clicking on the Select button If a parent folder contains DEM data a dialog box Figure 6 11 will open after selecting the folder prompting the user to decide whether t
35. he map decide where to save it the appropriate format to export in and the image quality Figure 6 42 Figure 6 42 Export Map interface 7 Working with GIS Weasel BAGIS uses the same file structure as what is defined in GIS Weasel to store the DEM and its derived surfaces of an AOI See Section 5 for a description of the workspace and file structure of BAGIS Users can use GIS Weasel to process the AOls created in BAGIS The GIS Weasel tool was partially developed in ArcInfo AML ESRI s ArcInfo Workstation product must be installed on the computer to use the Weasel tool Please use the instructions below to bring BAGIS AOls into GIS Weasel 1 In BAGIS select the AOI Utilities tool see Section 6 1 4 and set the AOI you want to process as the target AOI 2 Use Click on the Update Weasel Info tool to update Weasel s file dependency information of the AOI Make sure you file path is within the length limit of Weasel If 36 Basin Analysis GIS the length exceeds the limit a warning message appears ArcInfo i e GIS Weasel does not allow the name of any folder to exceed 80 characters and the path of a workspace to exceed 115 characters 3 Open The GIS Weasel Tool by double clicking the tool icon on the desktop 4 Navigate to the basin folder and select click on the AOI folder Check the Use Input DEM previously associated with current Write Directory Figure 7 1 and select the grid layer appeared in the Input Ele
36. hey will use the current DEM data for this analysis If a user chooses Yes the AOI Tools will become available as the remaining Basin Tools stay inactive if the user chooses No then all existing basin DEM data are deleted and the user must proceed to the Set DEM Extent tool see 6 2 2 in order to regenerate the data After the user selects the basin folder the folder s name is then placed in the Selected Basin text box Reuse existing DEM Figure 6 11 A message box confirming if the user wants to reuse the existing DEM of a basin The View Layers button will become active after a user selects a folder that contains DEM data Selecting this button opens a list of layers that are generated by the Basin Tool module and allows the user to preview these data in the active map Figure 6 12 The user can then either the check specific layers or all layers with the All button that they wish to preview A None button has been installed that will prompt the clearing of all selected layers in this list 18 Basin Analysis GIS Load DEM Layers Select the layer s to view M Filled DEM M Flow Direction M Flow Accumulation M Slope M Aspect M Hillshade i None Display Cancel Figure 6 12 The image displays the View Layers dialog window 6 2 2 Set DEM Extent The Set DEM Extent Te tool allows the user to generate a rectangular graphic around the extent of a basin Figure 6 13 The bound
37. ile Type ESRI GRID file Geometry Raster Data Source ASTER Global Digital Elevation Model GDEM ASTER GDEM is a product of METI and NASA Download URL http www gdem aster ersdac or jp search jsp Metadata URL https Ipdaac usgs gov Ipdaac products aster_overview Processes 1 Shapefiles downloaded from URL by LatLong tiles 2 GeoTIFF files unpacked using 7 Zip 3 GeoTIFF files transformed to img format 4 GeoTIFF files mosaicked to single img file 5 img file transformed to GRID format 6 Reprojected to USA Contiguous Albers Equal Area Conic USGS _ version Attributes This raster does not have an attribute table Thumbnail image P A e te Laso adi an gt 43 Basin Analysis GIS Data Name DEM 30 meters Canada File Name cdndem30_alb File Folder Projects NWCC GIS Static CDNDEM_30_albers File Type ESRI GRID file Geometry Raster Data Source ASTER Global Digital Elevation Model GDEM ASTER GDEM is a product of METI and NASA Download URL http www gdem aster ersdac or jp search jsp Metadata URL https Ipdaac usgs gov Ipdaac products aster_overview Processes 1 Shapefiles downloaded from URL by LatLong tiles 2 GeoTIFF files unpacked using 7 Zip 3 GeoTIFF files transformed to img format 4 GeoTIFF files mosaicked to single img file 5 imgfile transformed to GRID format 6 Reprojected to USA Contiguous_Albers_Equal_ Area Conic USGS _ version Attributes This rast
38. ing to AOI boundary generated in the AOI Tools Module Figure 6 6 highlighted in Green These layers are optional to add and must be in either shapefile or raster format does not support triangulated irregular networks or coverages There are several commands associated with managing these files in the System Configuration Module A user can add an entry with the Add button remove an entry with the Remove button and clear all entries in the list box using the Clear All button 15 Basin Analysis GIS Seltirmgs L 00CUME 1UPMUserWMOCALS 1 lemp basinanalyst del Terrain Ref EANRCS aIS Static Reference Data US_DEM1Sse LS ShadecRe lf 300Multi br Double Click a reference field to Drainage Ref eee See Clear Its layer setting atershed Ref E wrcs cis state Reference_Data JS_Mydro USGS_HUCE lyr Add Ref Layers to Map 10 Meters DEM E ARCSYGISS tatio DEM ZOMDEM west 30 Preferred DEM 10m 30m 30 Meters DEM E WACS GIS Stak peM SOMDEMWweeks 39 Elevation Unit Maters Feet Name field Area Field Gauge Stations E wecsvais Stanc Forecast_Ponts gusforecastponts Shapefile Station Area Unit Elevation field SNOTEL E VMRCSWGISEtatic SNOTEL snotel0id_ab_Projact Ghapafie set oley_ft SNOTEL Elev TE Motors Feat Snow Course BE NRCS GIS Static Snow_Course SnowCourses_Abers Shapefile get feet 2 site name Snow Cos Eley Unit C Meters Feet Frecipitation EwecsiasistatcPRISM o
39. ion zones have been created the user can then click on the 4 Generate Zones button to generate new raster files with these reclassified zones These raster files will be saved in the Analysis folder of the AOI directory Optionally a user can conduct a basin analysis on a user specified elevation range The Generate Tables and Charts for Specified Elevation Range data frame lower left corner of the window enables the selection of a from elevation value and a to elevation value from the elevation list box to the right The user can toggle the set value from and to option buttons and click on an item in the list box to set the from and to elevation values After the elevation and precipitation data has been reclassified the user can then generate tables and charts that display the zonal statistics of each reclassification These tables see Figure 6 32 for example and charts see Figure 6 33 for an example will be placed in an Excel file when the process is completed Tables 6 2 and 6 3 summary the Excel spreadsheets created by the Generate Maps tool A list of the charts generated is shown in Table 6 4 Please refer to Appendix B for a detail description of the columns in these spreadsheets and Appendix C for the example of different types of charts er B C D E F G H J K 1 VALUE COUNT AREA MIN MAX RANGE MEAN STD SUM AREA Label 2 2272 87 0 3 2367 2 1 874885 5 22 002985 22 002985 O 22 002985 O 22 002985 1 449275362 23
40. ir Inflow 2 Now La Plata R at Hesperus Mast Select Value Hgn 254 i 10 FP Fiow Dwection a ww Display Sousce Selection lea ce i warg R oO A Ara 0 ps pup Ar Be de 0 LLISSOL 40 1701057411 Meters Figure 6 19 Pour point selection dialog window 22 Basin Analysis GIS After selecting the Gauge Station a message box will open that will allow the user to rename the AOI folder Figure 6 20 The default folder name will be the station name followed by the date of creation AOI Name Please enter the name of the AGI Figure 6 20 Message box used to rename AOI folder 6 3 2 Set Pour Point The Set Pour Point tool fe is used to correct any spatial inaccuracies associated with the Gauge Station shapefile by allowing the user to manually set the pour point location of an AOI Figure 6 21 The pour point then is used to delineate the boundaries of the AOI The location of the pour point has to be on the stream channel characterized by the flow accumulation layer to generate correct AOI Users should zoom closely to the gauge station to get a precise placement of the pour point See Figure 6 22 Untitled ArcMap Arcinfo Fie Edt Mew Bookmarks Insert Selection Took Window Hel beds A 1100 18 Mu gnr x Basin Analyst v S i a Analysis and Maps Y S OSE M Gauge Stations i MI Beer DEM Extent RM Flow Accunulation value Low 0 MI
41. lowest points of closed basins and create a point for each basin You might want to add attribute to differentiate the lowest points of different closed basins 3 Activate the Spatial Analyst extension in ArcMap and use the Feature to Raster tool in ArcToolbox to convert the shapefile to a raster grid Set the output raster to have the same spatial extent and cell size as the DEM 4 The output raster contains some cells with values and all other cells with a NODATA value The next step is to use the CON conditional and ISNULL tools to change the NODATA value to 0 zero and other values to 1 If you use ArcGIS raster calculator you should use the following syntax to generate the output CON TSNUEE pOInCOrid Oy 1 5 Now you can use the SETNULL tool again to set the elevation on the DEM to NODATA at the lowest points of the closed basin Assume the output of Step 4 is called lowestp the syntax is SETNULL lowestp 1 dem 6 You should verify the DEM is correctly conditioned Add both the point shapefile and the DEM to ArcMap and zoom in to a selected point on the shapefile Verify the value on that location is NODATA After the verification the DEM is ready for creating AOls of these closed basins Make sure you update the settings value in BAGIS and disable the snap feature when creating AOls of closed watersheds 39 Basin Analysis GIS Appendix A Basin Analysis GIS BAGIS Input Data Dictionary All GIS data collected a
42. nalysis GIS Table 6 3 Excel spreadsheets created in elevation range analysis within user specified elevation range Name see Table 5 4 Elevation Area distribution of elevation zones Range within user specified elevation range PRISM Range Precipitation distribution of elevation Precipitation Distribution and zones within user specified elevation Precipitation Distribution combined range with SNOTEL and Snow Course SNOTEL Range Area distribution between SNOTEL SNOTEL and Precipitation Distribution sites at different elevations within combined with SNOTEL and Snow user specified elevation range Course Snow Course Area distribution between Snow Snow Course and Precipitation Course sites at different elevations Distribution combined with SNOTEL within user specified elevation range and Snow Course Table 6 4 Excel charts created in basin analysis and elevation range analysis Chart Name Area Elevation Scatter plot Cumulative area against elevation Precipitation Distribution Scatter plot precipitation volume against elevation superimposed by Area Elevation Chart Precipitation Distribution Scatter plot precipitation volume against elevation combined with SNOTEL superimposed by Area Elevation SNOTEL and and Snow Course Snow Course Charts SNOTEL Scatter plot Cumulative area against elevation of SNOTEL esa superimposed by Area Elevation Chart Snow Course Scatter plot Cumulative area agai
43. nd compiled for BAGIS are in the Albers Equal Area Conic Projection The specific projection parameters are USA_ Contiguous_Albers_Equal_ Area_Conic_USGS_ version Projection Albers False_Easting 0 000000 False_Northing 0 000000 Central Meridian 96 000000 Standard_Parallel 1 29 500000 Standard _Parallel 2 45 500000 Latitude_Of_ Origin 23 000000 Linear Unit Meter 1 000000 Geographic Coordinate System GCS_North_American_1983 Angular Unit Degree 0 017453292519943299 Prime Meridian Greenwich 0 000000000000000000 Datum D_North_American_1983 Spheroid GRS_1980 Semimajor Axis 6378137 000000000000000000 Semiminor Axis 6356752 314140356100000000 Inverse Flattening 298 257222101000020000 40 Basin Analysis GIS BAGIS Data Catalog Data Type Active COOP Sites COOP Climate Stations GIS Point NWCC Active Inactive Existing Snow Courses GIS Point NWCC Snow Courses DEM 10 meters USGS The National GIS The National Map Western US Elevation Dataset NED Grid Raster Seamless Server 1 3 arc second Alaska Elevation Map Grid Raster Canada Elevation Map Grid Raster DEM 30 meters USGS The National GIS The National Map Western US Elevation Dataset NED Grid Raster Seamless Server 1 arc second obey USS Wes Giamaser USGS Weasel Grid Raster Cover Weasel Grid Raster HUC Basin Hydrologic Unit Code GIS Polygon Boundary Boundary Federal Seamless Server Indian Seamless Server Wilderness
44. ng the production reviewing and verification of Basin and AOI data The steps and their specific tasks are listed in Table 2 1 Table 2 1 Collaborative AOI delineation procedures 1 Basic Layers NWCC provides SNOTEL active snow course sites and forecast point Compilation locations as ESRI shapefiles 2 ldentification of Supplemental Layers 3 BASIN List Compilation 4 BASIN Creation 5 BASIN Verification 6 AOI Creation NWCC specifies the supplemental layers to be incorporated in the basin analysis The layers identified include Forest service road shapefile NLCD Land cover raster grid 2001 Forest canopy density Forest density Forest land cover type Federal land Indian land Wilderness land PRISM precipitation layers USFS service roads National atlas waterbodies National atlas streams National atlas roads NWCC provides a list of large watersheds for the preparation of BAGIS BASINs The watersheds are identified using the ID and name of the forecast points The average size of the basins is around 5000 square miles PSU creates BAGIS BASINs by delineating rectangular boundaries that encompass the complete watersheds of the identified forecast points A map showing the BASIN boundaries is submitted to NWCC for review NWCC reviews the BASIN boundaries and identifies AOls in each BASIN The AOls are identified using the ID and name of the forecast points If PSU is not notified by NWCC AOls are delin
45. nst elevation of Snow Seer Course superimposed by Area Elevation Chart Aspect Distribution area of each aspect direction The last function allows the user to generate maps after each reclassification by clicking on the Maps button Once the process is completed premade mapping templates can be found in the Analysis and Maps menu bar Each map represents its own theme and is equipped with a legend scale bar north arrow title and appropriate layers Users are allowed to modify these map elements freely using ArcMap s built in functions See Sections 6 4 3 through 6 4 8 for samples of maps generated by BAGIS 31 Basin Analysis GIS 6 4 3 Elevation distribution map ROARING FORK AT GLENWOOD SPRINGS S AT UCO SMALL ELEVATION DISTRIBUTION Bevahon jn Feet gt O Un g PD 271305 6100 6300 7000 Figure 6 34 Elevation distribution map in a selected AOI 6 4 4 SNOTEL elevation representation map ANIMAS R AT DURANGO 07282010 AT NEW_BASIN ELEVATIONAL REPRESENTATION SNOTEL SITES SNOTEL Representation f SNOTELSites CASCADE _ CASCADE 2 MINERAL CREEK MOLAS LAKE DO SPUD MOUNTAIN COLUMBUS BASIN RED MOUNTAIN PASS __ Not represented 7 5 Miles Figure 6 35 SNOTEL elevation representation map in a selected AOI 32 Basin Analysis GIS 6 4 5 Snow course elevation representation map ANIMAS R AT DURANGO 07282010 AT NEW BASIN ELEVATIONAL REPRESENTATION SHOW COURS
46. on 1 was initially released in July 2010 and deployed to NWCC for intensive testing The latest version BAGIS_Ver1F was released on December 31 2010 CSAR continues to provide maintenance and technical support through additional agreements The project team has completed the collection and compilation of 22 GIS data layers All collected data layers were projected to the NAD 83 Albers Equal Area Conic USGS projection The key data layers include USGS 10 meters and 30 meters DEMs PRISM precipitation data created by the PRISM Climate Group led by Oregon State University The compilation of these datasets had to deal with files with enormous file sizes making it a time consuming process For example the PRISM precipitation dataset contains 17 layers 12 monthly 4 quarterly and 1 annual precipitation data layers with a total file size of 1 43 GB The USGS 30 meters DEM 2 Basin Analysis GIS requires 35 GB of disk space The dataset also reaches the upper file size limit for ArcGIS to process the dataset efficiently As a result the 10 meters DEM is separated into several image mosaics with a total size over 300 GB The project has provided a detail documentation of the data compilation process and the meta data of the GIS layers Please refer to Appendix A for the data catalog and data dictionary of the data layers The project team has met and defined a protocol for collaborative efforts in basin analysis The protocol has 7 major steps involvi
47. ountainous terrain a value of 5 for flat terrain Depending on the size of the basin the Clipping process could take minutes to hours to complete BAGIS shows a message window to inform the progress of the process Figure 6 15 Figure 6 16 shows an example of the output basin DEM Clipping Source GEM 10 meters 30 meters Select the output layer s to view Select All Select None w DEM Extent Filled DEM Flow Direction i Slope i Aspect Hillshade Hillshade Z factor 1 Figure 6 14 The Clip DEM Tool interface Basin Analysis Message Clipping DEM to Basin Folder PA Clipping DEM step 1 of 13 Figure 6 15 A message window showing the progress of basin preparation process 20 Basin Analysis GIS Untitled ArcMap Arcinfo Seles Fie Edit view Bookmarks Insert Selection Tools Window Help Dea St BBX o a 1513842 24 8 Oe B a Basin Analyst Ok g e Analysis and Maps x BERE TE pre EEG Basin DEM Extent Hillshade Value High 254 Low 0 Watershed Reference Terrain Reference enna gt Drawing A i O Av 1 Arial 10 B Z UA De Pv 1424286 523 2774452107 Meters Figure 6 16 The hillshade layer of a BAGIS basin 6 3 AOI Tools Module The AOI Area of Interest Tools Module Figure 6 17 has three major components 1 AOI Tool 2 Set Pour Point tool and 3 Create
48. ous_ Albers Equal Area Conic _USGS_ version with a geographic transformation from NAD_1927_CGQ77 to NAD_1983 2 Attributes Shape Geometry od FID Numerico _ _ Forio f nomere S Thumbnail image per lepers bi Fosca Al ar x _ t 52 Basin Analysis GIS Appendix B Table columns in Excel spreadsheets generated in Basin Analysis Spreadsheet Name Aspect MAX I Average aspect degree 0 for due north Number _AREA IN MAX D M Spreadsheet Name Area Elevations Maximum elevation feet or meters Number Spreadsheet Name Elevation Curve See Area Elevations 53 Basin Analysis GIS Spreadsheet Name Elevation Range MIN MAX STD SUM Spreadsheet Name PRISM MIN MAX STD SUM the elevation raster instead of the PRISM raster 54 Basin Analysis GIS Spreadsheet Name PRISM Range M Minimum precipitation inches Maximum precipitation inches Number Range of precipitation inches Average precipitation inches Total precipitation of all the cells in the interval inches AREA_DEM Number Area square meters within each elevation interval derived IN AX D M from the elevation raster instead of the PRISM raster 7 _AREA_DEM Percentage of area of the interval based on AREA_DEM VOL_ACRE_FT Precipitation volume Acre feet in elevation interval _VOL Percentage of precipitation volume Spreadsheet Name Slope 55 Basin Analy
49. r The task generates essential information for water resource managers to make effective water usage plans Water forecast requires the integration of accurate geo Spatial data and rigorous hydrological models There are five major steps in performing water forecast 1 Delineating area of interest AOI 2 Collecting precipitation data via SNOTEL or snow course sites 3 Delineating hydrological response units HRU 4 Summarizing HRU 1 Basin Analysis GIS parameters 5 Modeling hydrographs Figure 2 1 The scope of this project is focused on development of GIS tool to support steps 1 and 2 indicated by the red rectangle on Figure 2 1 Water Forecast AI Delineation HRU Defneation HRU Parameten zaton New SNOTEL Site Figure 2 1 Water forecast locations and AOls created from them The specific tasks completed include 1 Basin Analysis GIS Model Building 2 GIS data compilation 3 GIS Basin Analysis Model execution In addition a pilot examination of GIS Dynamic spatial web interface was conducted The project team including personnel from both NWCC and PSU CSAR met regularly throughout the project period to design refine and test the Basin Analysis GIS BAGIS model The full functions of BAGIS are described in this document The main computer programming task of developing BAGIS was done between November 2009 and July 2010 including a three months beta testing period April to June 2010 BAGIS versi
50. r into a streams vector layer using the standard deviation of flow accumulation value Figure 6 29 The interface reports the Max Flow Accumulation Value and Standard Deviation of Flow Accumulation value to the user upon initialization After being generated the layer is saved in the AOI Layers folder and added to the map Figure 6 30 A smaller value creates a more detail stream layer AOI Flow Accumulation to Streams Max Flow Accumulation Value SAAS Standard Deviation of Flow Accumulation Sees Threshold Value Standard Deviation i Create Cancel Figure 6 29 The Create AOI Streams dialog window A B Figure 6 30 The stream layer of an AOI created with the Create AOI Streams tool The stream lines were derived from the flow accumulation layer of the AOI Map A used a threshold value of 1 standard deviation Map B is 0 2 standard deviation 27 Basin Analysis GIS 6 4 2 Generate Maps The purpose of the Generate Maps tool is to reclassify the DEM data into zones of interest precipitation classes SNOTEL and Snow Course site locations and project their analysis through a series of maps tables and charts In order to accomplish this the Generate Maps tool is devised in five different functions that address these objectives Figure 6 31 Map Settings AOI Area Elevation m Elevation Unit Batastatue Data Description Raster Name siggy Ready ADI Streams ao _streams Mete
51. ribution Precipitation Distribution 8 j 12 Elevation Meters Elevation Meters Elevation Distribution Elevation Snow Course SNOTEL i Precipitation Chart Name Description SNOTEL Scatter plot Cumulative area against elevation of SNOTEL superimposed by Area Elevation Chart SNOTEL Elevation Meters Fleyation A SNOTEL 58 Basin Analysis GIS Chart Name Snow Course Scatter plot Cumulative area against elevation of Snow Course superimposed by Area Elevation Chart Snow Course Elevation Meters Elevation Distribution Flevation Snow Course Chart Name Description Slope Distribution area of each slope interval Slope Distribution 10 15 15 20 Flat 7 59 Basin Analysis GIS Chart Name Aspect Distribution area of each aspect direction Aspect Distribution E 5 9 8 7 6 5 4 3 2 1 0 sii A N NNE NE ENE ESE SE SSE 3 SW SW Wiw W WNW Nw NAW m 60 Basin Analysis GIS
52. rs PRISM Elevation Zones elevzone Feet Elevation Zones subelev 700 90 S4 Mie Range 2302 08 Precipitation Zones preczone SNOTEL Elevation Zones stelzone Elevation Zones for Precipitation Analysis Snow Course Elevation Zones scoszone Aspect espzore Slope sipzone 1915 33 S3 Km Mn 1986 16 44057621 re Max 4288 25 interval 200 Classes 13 1 Apply Intervali Arsa SNOTE Sow Courts Precipitation Distribution Map 2200 2400 2400 2600 ED HN ome 1 2600 200 Precio Interval 2900 3000 i gt X pa Precip ation inches pa am 2 EA UU ta n inches TAN 3400 56 Min 3400 3600 i Precip Zone 10 pe Ser __ Max Elevation Subdivisions on Elevation Curve Range a 2000 2200 a DA JIM Data Arrual Precio Siro hd o Get Range l Generate Tables and Charts for Specified Elevation Range Gi 5 2000 2200 2400 Figure 6 31 Generate Maps tool dialog window Upon opening the Generate Maps tool information pertaining to AOl s area and elevation will be provided in the AOI Information data frame upper left corner The availability of various data layers used in making tables and charts is reported in the Data Status data frame upper right corner After verifying this data the user can proceed to the Elevation Zones foe Precipitation Analysis data frame mid left of the dialog window where they can select the elevation interval that they
53. sis GIS Spreadsheet Name SNOTEL Field Name Data Type VALUE elevation of sites COUNT Number Number of raster cells between the site s and its next lower site s unit in feet of meters AREA Area square meters MN Number Next lower elevation of the n __ feet or meters MAX Number Elevation of the Elevation of the site s feet or meters ss feet or meters RANGE Number Elevation difference between the site s and the next lower site s feet or meters Cumulative percentage of area Spreadsheet Name SNOTEL Range See SNOTEL Spreadsheet Name Snow Course See SNOTEL Spreadsheet Name Snow Course Range See SNOTEL 56 Basin Analysis GIS Appendix C Excel Charts Generated in BAGIS Chart Name Area Elevation Scatter plot Cumulative area against elevation Area Elevation Ele uation Meters 0 20 40 60 BO 100 Elevation Distribution Chart Name Precipitation Distribution Scatter plot precipitation volume against elevation superimposed by Area Elevation Chart Precipitation Distribution Precipitation Distribution Elevation Meters ry a Z A E a La Elevation Distribution Elevation liPrecipitation 57 Basin Analysis GIS Chart Name Precipitation Distribution Scatter plot precipitation volume against elevation combined with SNOTEL superimposed by Area Elevation SNOTEL and and Snow Course Snow Course Charts Precipitation Dist
54. the areas shown in acres or hectares and percentages of non presented areas are displayed on the dialog window Figure 6 40 and in the map layout window Figure 6 41 ADI Elevation Al area above the highest site and Min 207 Max 633 below 200 Feet below the kwestsite Close Existing Sites Lowest Elev Highest Eley New Lowest Eley New Highest Elev Elevation Lbed 257 Calculate x Actual Non represented Area in AOI Pseudo Norrrepresentecd Area in ADI Below Above Total Below Above Total 24 534 24 34 Ages 0 00 13 52 13 52 9 85 9 85 Hectares 0 00 5 47 5 47 3 05 3 05 of AOL 0 00 1 72 1 72 Figure 6 40 The Create AOI Streams interface 5 4 10 Actual representation map amp 5 4 11 Pseudo representation map UNCOMPAHGRE_R AT COLONA 06112010 UNCOMPAHGRE R AT COLONA 06112010 AT BASIN 060710 AT BASIN_0607 10 ACTUAL ELEVATIONAL REPRESEN TATION PSEUDO ELEVATIONAL REPRESEN TATION Legend E Stow Coses f SNOTELSfes SNOTELSIes Not epre sen ed be kw Not e pre sert di be kw 0 Fepesentd 0 Fepesentd mai Epre sei owe Hh E pre sei cue t eda Not edab Legend i Show Coses Figure 6 41 Elevational representations of SNOTEL and snow course sites A actual sites B pseudo sites 35 Basin Analysis GIS 6 4 12 Export Maps Users can export the current map by selecting the Export Maps tool found in the Analysis and Maps menu bar This opens an export interface that allows the user to name t
55. un Jul Aug Sep Oct Nov Dec Q1 Q2 Q3 Q4 Annual each containing a raster grid called grid Figure 4 1 is an ArcCatalog view of the PRISM folder Participating layers any other layer that might be used in the basin analysis Some of the commonly used layers are listed in Table 4 1 Please refer to Section 6 1 5 System Settings Module for detail instructions on preparing the data for BAGIS 8 Basin Analysis GIS A ArcCatalog ArcInfo E NRCS GIS Static PRISM Annual File Edit View Go Tools Window Help 65 ce oo EA E CF d hk Location EAAWACS GI S45tatic PRIS MM Annual Stylesheet Contents Preview Metadata Mame Type pa grid Raster Dataset J Reference Data T SNOTEL Figure 4 1 An ArcCatalog screenshot of the PRISM precipitation file structure Table 4 1 Commonly used data layers in Basin Analysis see Appendix A for more information 9 Basin Analysis GIS 5 Workspace File Structures To facilitate data management and processing BAGIS adopts the file organization structure used by NWCC and the USGS Weasel GIS tool The main workspace is on NWCC s network file system e g S Drive Under the main GIS folder there are two subfolders Basins and Static Basins stores basin analysis output Static contains source and supplemental data used in basin analysis This file structure Fig 5 1 could be altered by the users if necessary Under the main basin folder the model will
56. used in basin analysis If new PRISM SNOTEL or snow course data become available users can use this tool to update the internal BAGIS layers in the selected AOI Make sure the new layers are correctly specified in the system settings dialog window see Section 14 Basin Analysis GIS 6 15 You need to first select the layer s you want to update and click the Re Clip Selected Layers button to update the selected layer s in AOI Add a New Layer to AOI Tool The tool allows users to add new user s layers one at a time to the selected AOI The added layer appears in the Presence of User s Layers in AOI panel Users can click the layers in the panels and use the Add Selections to Map button to quickly add the selected layers to ArcMap Update Weasel Info Tool If an AOI was moved to a folder different from its original folder then a user must update the file dependency definition files in the AOI before the AOI can be used in the GIS Weasel tool Just select the AOI you want to process and click the Update Weasel Info button The path information in all file dependency definition files in the AOI is updated immediately 6 1 5 System Settings The System Settings window is used to provide the file path locations for data used in BAGIS It can be accessed by clicking on the Basin Analyst menu bar and selecting Options from the dropdown list This opens the System Settings dialog window Figure 6 6 which allows users to specify sour
57. vation Grid panel Click Apply to continue Write Directory jd mrce gie basina uco santafe r nr santafe Subcli rectorisa Sn inci anda jans iavers l e te Use Input DEM previously associated with current Write Directory A Interactive Proceasing On Off Input DEM Source Directory ID HRCS CIS Sasine UCO SantaFe R nr SantaFe o MESIA Ee A Eee te i APART Subeirectories Input Elevation Grid grid info PLUG tita QUIT Figure 7 1 GIS Weasel main dialog window for selecting an AOI 5 Set the elevation Z unit of the DEM grid 6 Follow the prompt to reuse the layers created in BAGIS 7 When the AOI Delineation dialog appears set Raster as the externally established AOI Click Use externally established AOI Figure 7 2 2 Aol Delineation ec C2 mi Please choose a method for generating the Area of Interest ADOT Digitize pour point to create a custom watershed as the AOI Use externally established AOI Raster Vector Figure 7 2 GIS Weasel dialog window for choosing AOI boundaries layer 37 Basin Analysis GIS Act Deineation Pre eouting Map Source Directory i neo e gis bazina uco santafe re s Saldi rectories MEW THE eis pa erna aci J 1D gt ADI Figure 7 3 Selecting a pre existing AOI boundary in GIS Weasel 8 Select the AOI raster layer and click Apply to continue Figure 7 3 The AOI Delineation dialog
58. vironment When done please click the Save Settings button to save the data you just entered The settings data is saved in an ASCII definition file basinanalyst def stored in a folder specified by an environmental variable You can see the path of the folder on the caption of the Settings dialog window The model looks for BAGIS TMP TEMP and ARCGISHOME sequentially until finds one variable that is valid Usually TMP TEMP and ARCGISHOME exist on your computer If you plan to store the definition file in a particular folder you can create an environmental variable called BAGIS and set its value to a path that you have full access privileges Please contact your system administrator if you don t know how to create an environmental variable 7 Basin Analysis GIS 4 3 GIS Data Preparation All GIS layers to be used in BAGIS must be in the same projection The projection of the BAGIS data is in Albers Equal Area Conic Projection USGS Version If the data are in other projections please use the project or raster project tool in ArcToolbox to reproject the data See Appendix A for the project parameters of the Albers projection There are five major categories of GIS data you need to specify in the Settings window of BAGIS including Reference maps for locating basins i e watersheds and Area of Interest AOI i e subwatersheds These maps are pre symbolized data stored in ArcMap layer files lyr You should create these l
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