The Basics
Contents
1. WS Elev tt Vel Chni ft s 200 300 400 500 600 Q Total cfs 200 300 400 500 600 Q Total cfs View Cross Section Table Several geometric energetic and hydraulic information is available per cross section Erie to move to nent downstream river staton location 20 View the Output JEF Profile Output Table Standard Table 1 File Options Std Tables Locations Help HEC RAS Pi Reload Data Reach River Sta Profile Min Ch El W S Elev Crit W S E G Elev E G Slope Vv cfs fi i 7 i ay project area 100 500cts project area 100 project area 100 project area 99 5 project area 99 5 418 20 418 20 418 20 418 03 418 03 421 76 425 53 431 76 421 59 425 36 431 59 421 95 425 96 432 59 421 77 425 79 0 001709 0 001791 0 001766 0 001713 0 001794 project areal 99 5 00 418 03 4 432 42 0 001767 I aie se MinChEl W S Elev CritW S E G Elev Under Options select Define H ty ty f i 2 2 Table to see more variables 2 2 wj Insert Column Clear All Table Headings Available Variable Center Station Conv Left Crit Enrgy 1 Beta Ch StaL Cony Ratio Crit Enrgy 2 BROpenArea ChStaR Conv Right Crit Enrgy 3 BR Open Vel Civ EG No Wr Conv Total Crit Num Br Sel Method Coef of Q Crit Depth Crit W S C amp E Loss Cony Chnl Crit E G Crit W S 1 BN HEC RAS River Analysis System Generate Reports You can select Generat2. Study Area 94 Uncertain WS 300 400 500 600 700 800 900 1000 Station ft Enter to move to next downstream river station location Notes on Cross Section D Notes on Cross Section D Location of X sections within a reach varies with the intensity of the study and y y The left and right channel banks must be given at a station located in the X the conditions of the reach section elevation station data set Figure shows only right bank The choice of friction loss equations will also affect X section spacing and predicted floodelevationi Boundaries are fixed can not reflect changes during a storm scour deposition Higher number X section river stations are assumed to be upstream of lower X section endpoints that are below the computed water surface profile will be number river stations Slope areas require more X sections extended vertically to contain the routed flows with area wetted perimeter The left side of the X section looking downstream is assumed to have the lower reflecting this boundary condition To avoid this be certain that the cross section X values and progress right as the X values increase can not narrow the section eee T p AEE WETE OOC GOES MOE OCEN a eienn esec M endpoint if the water floods it G X original right bank endpoint Better right bank endpoint Notes on Cross Section D Notes on Cross Section D Consider what is being modeled The program can HEC RAS
3. of Original sections ing l aa nterpot A discharge weighted total reach length is determined by HECRAS based on sections the discharges in the main channel and left and right overbank segments Lion Qion Lon Qen bro Qrov Qiob ai Qen Qrob L Interp 4 xs s between 20 and 30 Expansion amp Contraction No Transition Gradual Transition default Typical Bridge Transition Typical values for gradual transitions in supercritical flow are 0 05 for contraction and 0 10 for expansions Constructed prismatic channels should have expansion and contraction coefficients of 0 0 Ineffective Flow Areas Two types of Ineffective Flow Areas 1 Normal where you supply left and right stations with elevations which block flow to the left of the left station and to the right of the right station 2 Blocked where you can have multiple up to 10 blocked flow areas within the X section Ineffective Flow Areas Ineffective flow areas are used to model portions of the cross section in which water will pond but the velocity of that water in the downstream direction is equal to zero This water is included in the storage and wetted cross section parameters but not in the active flow area No additional wetted parameter is added to the active flow area unlike encroachments Once ineffective flow area is overtopped then that specific area is no longer considered ineffective Commonly us
4. Generate Report Export GIS Data Export to HEC DSS Open Backup Project Exit C HEC RAS20 DATASLANGDON hwy1f pr C HEC RAS20 DATASLANGDON LANGDIV pri C HEC RAS20 DATASLANGDON I5thfin prj C HEC RAS20 DATASLANGDON Imulfin pr C HEC Ras22 Data Multculy prj C HEC Ras22 Data aa pri C HEC Ras22 Data Beavcrek prj C HEC RAS20 Class data dennis ND EX2 pri x Check the unit system before accepting Units can be change before or after the model is created Starting a Project Select a working directory Then enter project title and file name Title File Name Directories Project title test prj C PROGRA 1 HEC RAS acs E PROGRA 1 HEC C viBin Steady ok Cancel Help Create Directoy Sc m Set drive and path then enter a new project title and file name Stream Geometry Data To add data click on Edit and Geometric Data S HEC RAS River Analysis System Or you can click on the Geometry Editor button Stream Geometry Data River System Schematic 7 Suggested order of data entry Must be added before any other features Draw and connect the reaches of the stream system Add River Reach es along with any Junctions Draw from upstream to downstream which will coincide with a flow actually this must be first direction arrow generally from top of screen to bottom Double Add Cross Section names elevation station data n click on last point
5. HECRAS Basis Input by G Parodi WRS ITC The Netherlands ITC Faculty of Geo Information Science and Earth Observation of the University of Twente Before you start Layout the model Extent of study area Area of interest Boundary conditions Section locations and orientation The Basics Geometry Data Flow Data Perform Hydraulic Computations Viewing the Output Geometry Data the basi Cross section information Roughness coefficients Distance between sections Bridge culvert data Cross Section Location Cross section orientation Place and measure cross sections when there is a change in Very important slope Survey Discharge perpendicular to flow Roughness bay note Channel shape straight line Control bridge levee weir etc Reach Lengths Are t In general High flow Widely spaced for flat very large rivers and closer for steep small streams Low flows Very large rivers Mississippi on the order of a mile 1600 m For large rivers on the order of 1000 feet 300 m For slower streams on the order of 200 feet 60 m For small creeks on the order of 25 feet 8 m For supercritical reaches on the order of 10 to 50 feet 3 to 15 m For drop structures as low as 5 feet 1 m Can interpolate if reasonable check results Not too close 1 may drop friction loses Survey Bridge Surveys Survey shots must describe the channel and overbank flow Profile road and brid
6. S Pocasset pocasriv g11 Steady Flow 2 l HEC RAS Pocasset pocasriv f01 Unsteady Flow _ S SS Project Desecration Pocasset River Watershed Watershed Management Project This project is located in the us Customary Units or select the Steady Bs Flow Analysis button 17 Perform the Hydraulic Comp In the window you can set flow regime select geometry and or flow files and start the computations The user must select the adequate subcritical supercritical or mixed options depending on the river regime A mistake in the river regime selection can be corrected after understanding the warnings amp graphical output ALWAYS SAVE Under File select Save Plan As Create a project title it brings up a window allowing you to enter a short plan identifier used in printouts and reports Ey Steady Flow Analysis Biej E3 File Options Help EJ Steady Flow Analysis Plan Base Data dim Options Help Geometry File Base Geometry el Steady Flow File Base flow data i Enter the short plan Identifier 12 char fi 974 peak merane o en L e l After selecting the compute button HECRAS does it s magic Simulation creates files of considerable size Steady Flow Simulation Version 3 1 November 2002 Perform the Hydraulic Comp There are several options available for the hydraulic computations User must refer to the manual for details fl Steady Flow Analysis Plar En
7. am highest number and select OK 20 0 Numbering is not related to progressive i To add a cross section between two existing OK Cancel ones add a number in between Number can be real or integers Adding Cross Sections To add cross section e data click on the Cross Section button from the ae Geometry Data i cee secon Dat Window rT Rename Hiver staton This brings up the eg riptic Delete Grass Section AGustelevations Cross Section Data m window from where Skew Coe Seton darien Vahes you choose Options and then Add a new Cross Section Horizontal Variation in n Values flection Horizontal Variation in K Values Vertical Variation in n Values niver for cross section Entering Cross Section Cross Section Data seeley crk COE existing FIS 97127 Mi EG You can enter a Exit Edit Options Plot Help lengthy description of River seeleyereek x ao gt F the cross section Reach study reach 7 River Sta 1 t FIS station a section 1 Description Bradford County Wells Township Del Row Downstream Corp Limit ewww 1051 9 1053 4 1052 5 1054 5 1054 4 1054 3 1051 3 1050 6 Station ft y Entering Cross Section De Cross Section Data seeley creek FIS study run dated 9 dec87 EQ i Egit Edit Options Plot Help This is the main Cross River seeley creek z Ea Ej Reach study reach 7 River Sta 11 x t Descriptio
8. am section of each river branch program default Steady Flow Data trial 1 flows File Options Help Enter Edit Number of Profiles 2000 max B Reach Boundary Conditions A tions of Flow Data Change River Reach project Doo L z Add A Flow Change Location oe cae ry Data File Options Help Enter Edit Number of Profiles 100 max 3 a Reach Boundary Conditions Apply Data iver al J Ai i gt River Sta ae Add A Flow Change low Data Change elect river station for adding a new flow change location dit Steady flow data for the profiles cfs Enter Flow Data There are 4 different methods for specifying the starting water surface at the boundaries in steady flow known elevation When the elevation of the water is fixed big lakes or sea critical depth up and downstream of a critical section the river branch is hydraulically separated and independent normal depth The slope of the water surface is known rating curve The rating curve at the boundary is known i Steady Flow Boundary Conditions Set boundary for all profiles Selected Boundary Condition Locations and Types Steady Flow Beach storage Area Wptimiestion 15 Enter Flow Data Enter Flow Data After selecting either the upstream or downstream data box and then a There are several options available in the Options window of the selecting method for providing starting conditions a window appears Steady Fl
9. croachments ShortID 11974 peak Flow Distribution Locations Final Sol Modified Conveyance Calculatior 1S aoe Friction Slope Method Fk Set Calculation Tolerances C Critical Depth Output Option C Critical Depth Computation Method Flow Optimizations E v Check data before execution Set Log File Output Level Enter view Log File Viewing the Output 18 View the Output View the Output Many output formats to view within the view menu View Cross Sections plotted cross sections Or you can select the appropriate button profiles rating curves Cross Section Psi Es 3 D views sees River Pocasset River z elle o cross section Reach Johnston Upper T River Sta 35906 sjt profile tabular data Pocasset River Watershed Plan Pocasset Base Model Final Modified B 3 5 03 O h Rer PocassetRier Reaci JolhisDi Upper RS 35905 Lista WHOS SiR d tom d Boe Qamal orte Certa thers e WS 100 Year WS 10 Year View WS 1 Year e L e al EH Ground NHEC RAS Anacostia 3 hectas datatanacastia3 pi Plan In Rati g HEC RAS Anacostia 3 hecras data anacastiad p17 Geomety fm a NHEC RAS nacostia 3 hecras datavanacastiag gl2 Steady Flow fm eae THECRAS Anacostia 3 hectas data anacastiaa 1 Unsteady Flow S ai fic Sal Water Surface Profiles View profiles Bank Sta Elevation ft eee anmental Enhancement Wetlands Study z US Customary Units Summary Err Wam Not
10. e data etc Observed Rating Curves Gages Gate Upennas Observed Water Surfaces for Comparison Rive MilCreek z Delete Row Pes Jae ane Fs ts ex Add an Obs WS Location d 9104 Enter Flow Data After entering your flow data it is suggested you save it to a file Steady Flow Data TR 20 Flow Data All Events Save Flow Data Save Flow Data As Rename Flow Title Delete Flow Data Set Location for DSS Connections DSS Import Perform the Hydraulic Computations Save Project After entering and saving the geometry and flow data it is suggested that you save your project from the main HEC RAS File Menu Saving is not automatic in HECRAS RED NUMBERS while entering data mean that the data is not saved yet RESI HEC RAS River Analysis System Edit Run View Options Help New Project Open Project Save Project As Rename Project Delete Project Project Summary Import HEC 2 Data Import HEC RAS Data Generate Report Export GIS Data Export to HEC DSS Restore Backup Data Exit Perform the Hydraulic Comp Enter the Steady Flow Analysis window from the main menu S HEC RAS River Analysis System x File Edt EIR view Options Help ea SAIS ees Tal i Sediment Analysis HEC RAS Pocasset pocastiv prj Plan Hydraulic Design Functions fied NHEC RAS Pocasset pocastiv p01 Geometry ing HEC RA
11. e Import HEC2 Data Import HEC RAS Data Generate Report Report from the HEC RAS Sreonecoss main menu Restore Data i Report Generator Report file _ C HEC RAS millcreek1 rep Asterisks for Borders 7 Ci Input Data There are several options PF Plen Data X Flow Data IX Geometric Data available for the report Output Profiles to Include in Report 123 content The report generated fo ee Deaedliud Lateral Wer able Culvert Table Storage Area T Bridge Table Storage Area Connection can be viewed or the resulting Mutpie operina I Pump Stations file printed A Inline WeirT able Flow Distribution a Table 1 PX Summary of Errors Wamings and Notes Output Errors Warnir Errors problems that prevents the program from running The user must change something Warnings does not prevent the program from running but the user should examine and review The user may want to change some input Notes provides information about how the program is performing the calculations user should review mm Errors Warnings and Notes for Plan Base Data x River Test Profle PF1 bd Reach AEN BaspData gt Sample view of the ref B millcteek1 rep Notepad File Edit Search Help INPUT Description 86 66 Station Elevation Data nun 6 Sta Eley Sta Eley Sta Eley Sta Elev 8 427 168 427 196 397 318 427 466 427 Manning s n Values nun 3 Sta n Val Sta n Val S
12. ed in culverts near road crossings Once water surface goes above the then that specific area is no longe Once water surface goes above the established elevations of the block then that specific area is no longer considered ineffective 10 Ineffective Flow Areas Option is from x section window Cross Section Data St Croix EWP revised Ext Edt AEE Bot Hep which brings up ee cee es eee this window Copy Current Cross Section Delt Coss Secon Rename River Station Adjust Elevations winstream Reach L Select Ineffective Mode i _ Channel _ Horizontal Variation inn Values Horizontal Variation in K Values Vertical Variation in n Values river for cross section Ineffective Flow Areas Cross Section File Options Help ive u O Reach StCroix 7 Riversta 0 i Jat St Croix EWP Plan modified geometery lowered overbank 3 5 03 River StCroix Reach StCroix RS 20 Sta 13 40 07 07 Legend WS 25 yr WS 100 yr EE EE SSS aS Por a an WS 10 yr i Y WS 2 yr Ground Think of them as E a dead storage zones Bank Sta Elevation tt 86 0 200 400 600 800 1000 1200 1400 Station ft 4 Ineffective Flow Areas The plotted x section looks like this Cross Section Data St Croix EWP revised Exit Edit Options Plot Help River StCroix 7 epi Dote S Prot Ootions E E T Keep Prev xs Plots _ Clear Prev Reach Stt id River sajo y 4 t SiOx BAP Plan
13. es Station ft View the Output View the Output See observed water surface profiles when you plot the profile Plot Profiles You can plot many profiles at the same time Zoom and Pan possibilities for details Profile Plot File Options Help Reaches Profiles gt fe WS 100 Year Ground Anacostia 3 Feasibility Study Plan min12 12 10 99 u Anacostia River Mainstem Obs WS 100 Year WS 20 WS 50 Ground Elevation t Main Channel Distance ft View the Output Plot profiles of different data assayi proposed Plan Asaayi proposed conditions final Geom proposed geometry submittal Flow flows Vel Chnl ft s Main Channel Distance ft View the Output X Y Z Perspective Plot Plot 3 D View Single Bridge Example 2 Plan Press Weir Method Note Cross section widths should be consistent for better presentation O View the Output Plot Rating Curves for a specified station Rating Curve 5 x File Options Help i x I River Diy Brook Ei Pile bo Rating Curve Reach Steep vj River Sta ites x t File Options Help PocassetRber ise rshed Pim PocassetBase Model Fhal Moditkd 8 3603 River Dybe mJl _ ____ j River Dry Brook Reach Stee RS 1168 5 Reach Steep v River Sta fies 7 t Legend PocassetRber Wise ished Piar PocassetBare Model Fhail Modda 3603 WS Elev River Dry Brook Reach Steep RS 1168 Vel Chnl
14. ge deck area centerline pattern Pier width location pial fow vanstion 7 i Section should extend across the entire floodplain eLow Chord Elevation Expansion Reach Plot cross section data especially electronic surveys Skew Angle bridge stream Idealized flow transition Take photographs Bridge opening if se Assume modeler has never seen the stream Note vegetation changes in cross section e g field trees grass buffer etc No 3 point cross sections LEE Starting HEC RAS Double Click on HEC Basic Input the model RAS icon tik Shortcut to EN ITC Faculty of Geo Information Science and Earth Observation of the University of Twente Starting a Project gt Cross Table View detailed output at XS Culverts Bridges and Inline Structures e Edit Run View Options Help Project oo Geometry J Establish the Unit first Click on File New Project from the main menu to start a project Starting a Project RAS Start a new project with test prj as its file name and Project title as its title in the C PROGRA 1 HEC RAS Directory The units system will be set to U S Customary but can be changed under the Options menu on the main RAS window rat fess isi Es o a ett hl AL e Tal New Project OpersProject Save Project Save Project As Rename Project Delete Project Project Summary Import HEC 2 Data Import HEC RAS Data
15. has an option to create interpolated cross sections It can be used to create more in between only reflect what is being entered sections as long as there are not section singularities z By reach Graphical re Mosea Section Edit z Asaayi x Reverse Stationing Data Set Ineffective Areas to Permanent Mode Wash 1 z Cross Cross Section Points Filter We i ies UpsteamRivSta r Downstream Riv Sta All RS x Maximum Distance between XS ff 2 Decimal places v For example unless this hole is blocked the Close Help model will assume that this area conveys flow Enter max distance between interp XSs E ion D Notes on Cross Section D Reach Lengths HEC RAS has an option to create interpolated cross Measured distances between X Sections reported as sections in a reach or between two sections distance to D S X Sections XS Interpolation St Croix EWP revised Ioj x Rive Sox Ye iv St XS Interpolation St Croix EWP revised Reach StCroix LowerRivSta PO Bs 2 2 Decimal places P o River StCroix il Upper Riv Sta E sjt Distance Between XS s Lower Riv St Po SOS S Maximum Distance ft v ZIG Delete interp interpolate React StCrom Distance Between XS s pee Maximum Distance ft 10 Delete Interp i 3 distances Left overbank right overbank and channel They can be very different for channels with large meander or in a bend
16. iv only Das Se PletOntions E F Keep Prevxs Plots _ClearPiev Reach StCroix v River OH i 4 t SLOX BAP Pian moedited geome ery lowered ombak VIDU ae River StCroix Reach StCroix RS 90 Sta 11430 Description fStat 30 O O D Del Row Ins Row Downstream Reach Lengths Legend LOB Channel Cross Section X Y Coordinates Ground Bank Sta Entering Cross Section D Notes on Cross Section D X sections should extend across the entire floodplain and be perpendicular to anticipated flow lines approximately perpendicular to ground contour lines Other but present sections can be shown in the same plot p app re i Ideal to check relative shape and elevation differences X sections should accurately represent stream and floodplain geometry Put in where changes occur in discharge slope shape roughness and bridges Enter X Section elevation station data from left to right as seen when looking Cross Section Data St Croix EWP revised SA A E RS downstream River StCroie 7 soy Daa Piet Onions BLE E Prev k eens oa mescia mR eee ma Cross Sections should start far enough downstream to zero out any errors in Description Sta 10 20 L River tCroix Reach StCroix RS 140 Sta 10 20 boundary conditions assumptions for sub critical profile Far from upstream for super critical flow The section of analysis should be farm from boundary errors Elevation t Actual Profile
17. mes in contact with the levee wall Elevation t 600 800 1000 1200 1400 Station ft gt Levees Option is from x section window Cross Section Data St Croix EWP revised which brings up this window XS Levee Data Enter station and elevation points to mark on cross section Left Right Station sco feo Levees 3 y Elevation 34 E En OK Cancel Defauits Clear Add a Lid toXS Bank _Rig Add Ice Cover pede Retna Caves Cont Exp Coefficients __ Horizontal Variation in n Values Expansio Horizontal Variation in K Values Levees Levees vs Ineffective Are conceptually similar but very different hydraulically Reach StCroix yj River Sta 20 7 The plotted St Croix EWP Plan modified geometery lowered overbank 3 5 03 p River StCroix Reach StCroix RS 20 Sta 13 40 x section of the ineffective station but the velocity is zero Volume included in Ineffective flow areas is used where water is present to the left right ii IKa WS 25 yr storage and wetted perimeter calculations but not in conveyance IS l WS 100 yr think ponded area WS 10 yr WS 2 yr Ground left right of the levee unless the levee elevation is exceeded The L P T distance that the levee is in contact with the water is included in the an a A levee acts as a vertical wall No water occupied the space to the Elevation t wetted perimeter calculations think wall 600 800 1000 1200 Sta
18. modited geome ey lowerd curbark 10T Ae River StCroix Reach StCroix RS 20 Sta 13 40 Description Sta 13 40 pei Del Row Ins Row Downstream Reach Lenaths z LOB Channel oss Section X Y Coordinates 0 mw o mw w m m m Stator qh Blocked Obstructions Used to define areas that will be permanently blocked out Decreases flow area and increases wetted perimeter when the water comes in contact with it Two types of blocked obstructions are available Normal and Multiple They are very similar to the Ineffective Flow areas except that the blocked areas are never available as water flow areas Water can get to the off sides of these obstructions 11 the blocked areas are never availe Blocked Obstructions which brings up this window Ea ar aaston Reach Lordit Obstructed Areas the blocked areas are never available as water flow areas i Select Obstruction Mode Skew Cross Section Ineffective Flow Areas Horizontal Variation in n Values Horizontal Variation in K Values p Blo Vertical Variation in n Values Levees The plotted X nve Eta section looks does Sie A St Croix EWP Plan modified geometery lowered overbank 3 5 03 like this River StCroix Reach StCroix RS 20 Sta 13 40 No water can get outside of a levee until it is overtopped kk ad Simulated by a vertical wall WS 100 yr ae Additional wetted perimeter is included when Ground Bank Sta water co
19. n station K 127 00 Del Row Ins Row Downstream Reach Lenaths LOB Channel Cross Section X Y Coordinates Section Data window Here you enter the basic cross section data such as elevation station data reach lengths n values bank stations and contraction and expansion loss coefficients Edi Station Elevation Data i Note Orientation is looking downstream A quick visual check of the data is available through the Plot Cross i Section in separate window option Plot Cr oss Description Sta 11430 In x the progressive In y the absolute elevation with drn respect to a datum File Options Help ve A Je Fee Dots show stations Reach Stix Z iver Sta feo a St Croix EWP Plan modified d overbank Red dots separate channel from ren a a ap 4 9g pp 7 banks left and right 5 Ground n values display on top Bani Sta Coordinates display as the mouse is moved around ORIENTATION IS LOOKING DOWNSTREAM Elevation ft There are several options available to further refine the cross section data File editing tools Geometric transformations and rescaling tools Editor of blocking no flow and disturbances Horizontal Variation in n Values Horizontal Variation in K Values Editors and rescaling of roughness Veca Variation inn Values Entering Cross Section L Cross Section Data St Croix EWP revised Exit Edit Options Plot Help
20. ow Data window such as changing profile names applying a for entering your data ratio to all flows etc Boundary conditions are entered Make a consultation of the manual for details downstream end for sub critical flow upstream end for super critical both for mixed when in the reach there are both sub and super critical sections sie EE Heo Ente Undo Edits Steady Flow Boundary Conditions j Delete Row From Table 3 Delete All Rows from Table Steady Flow Data Flow 01 Set boundary for all profiles C Set boundary for one profile at a time a Delete Column Profile From Table Fie Options Hep moo Available External Boundary Condtion Types dit Profile Name Enter Edit Number of Profiles 2000 max SA S E ER Observed ocations of Fh Be ine bine b River seeley creek 7 Dele Upeninge Reach sees River Sta 1 fi Opin Gate pennas ia Spt Flow Uptinnestion LW CR Gand Ramps Change Locatior Ciaqe Ares Elevations Steady How Heach Stcrag Enter Flow Data Observed Steady Flow Data trial 1 flows aii te Under Options select Observed WS Where do you get observed data Delete Flow From Table A menu appears Select River Station Use calibration data survey Delete All R from Table Sees 5 eae Select Add an Obs WS Location See Enter observed elevation RE e The observation of the water elevation must be in accordance with the profile debris lines mud marks gag
21. profiles Inthe example you enter 3 profiles then 3 boxes appear For the river Test in the Reach Main the 3 input discharges are entered in the profiles Steady Flow Data File Options Help Enter Edit Number of Profiles 100 max 3 a Bie Conditions _ Apply Data 2 w Data C hanages River Test T Reach ge 20 05 z _Add A Flow Change Location Profile Names and Flow Rates Re ee ute Edit Steady flow data for the profiles cts Enter Flow Data Bounc Set the boundary conditions by selecting Reach Boundary Conditions This brings up Steady Flow Boundary Conditions window You can set the boundary for all profiles at once or separately Steady Flow Data File Options Help Enter Edit Number of Profiles 100 max B Reach Boundary Conditions Profile Names and T i Steady Flow Boundary Conditions BEN Set boundary for all profiles C Set boundary for one profile at a time 120 Available External Boundary Condtion Types Known W S Critical Depth Normal Depth epth Rating Curve Selected Boundary Condition Locations and Types Stead kow Heach Storage Ares Uptimestion Enter to accept data c Enter Flow Data User can add flow changes at a certain station along one certain reach Select River Station Click Add a Flow Change Location and select the station and enter the added flow to the reach NOTE Normally the flow input will be required at least in the most upstre
22. ta n Val 8 04 166 635 318 64 Bank Sta Left Right Lengths Left Channel Right Coeff Contr Expan 1686 318 8 8 8 1 3 SUMMARY OF MANNING S N VALUES River Mill Creek Reach River Sta project area 168 project area 99 5 project area 99 project area 98 5 project area 98 project area 97 5 project area 97 project area 96 5 project area 96 21 Hydraulic Model Accur Absolute accuracy how good is your data 0 5 foot Relative accuracy very good compare one condition to another 22
23. tion ft arc TC Faculty of Geo Information Science and Earth Observation of the University of Twente After entering geometry data it is wise to save it Recommend doing this nee Lately eS Flow Data often as you enter data Rename Geometry Title Delete Geometry Data Copy to Import Geometry Data Exit Geometry Data Editor New Geometry Data Enter Flow Data Enter Flow Data Enter the Steady Flow Data Editor from the main menu pple elie UP eis AE R You can have up to 100 profiles Al HEC RAS River Analysis System One profile corresponds to one possible flow input configuration for the system River geometry does not change for different profiles e it brought up 3 boxes when 3 profiles are specified f File Options Help Geometry fseeley creek FIS study run dated 9 dec wes manual seeley seeley1 g01 Enter Edit Number of Profiles 2000 max M Reach Boundary Conditions Epp Date Steady Flow Flow 01 wes manual seeley seeley1 01 SSS SSS Locations of Flow Data Changes River Mil Creek 7 using FIS geometry US Customary Units Reach project area 7 River Sta 100 T _AddA Flow Change Location Flow Change Location Profile Names and Flow Rates Or you can select the Steady Flow Data button ITC dit Steady flow data for the profiles cfs Enter Flow Data Enter the input discharges for each profile in appropriate box Each river and branch require one the same number of
24. to end values bank stations reach lengths loss coefficients etc Add Road Bridge Culvert and or Weir Spillway data Can model from single reach to complicated networks The river can even split apart and then come back together Connection of 3 reaches is a junction Can accentuate by adding background bitmap River System Schematic River System Schematic Geometric Data File Edit View Tables Tools Help To add a River Reach select SERGEJA the River Reach button from E the Cross Section Editor Select existing River or enter a new River name 16 Char Max and enter Window A window then Reach name 16 Char Max Then add line s representing ze pops up to allow the schematic a ute cents you to ente you are modeling Single click between each segment of the River name line After your last line segment double click to end River System Schematic Edit and or create inline structures File Edit View Tables Tools Help The program then displays con hg a the river and its name in oF o 3 blue The reach name is in black Gas i Tributaries and or additional reaches can be PEAT added to the main reach using the same procedure ICAEAC a Adding Cross Sections t Enter the cross section name it must be a HEC RAS number Enter a new river station for the new cross section in reach Class It must be in numerical order upstre
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