MOD VIEW VERSION i.o A GRAPHICAL-KERNEL
Contents
1. RE TETAS SUMMARY MODVIEW is a Graphical Kernel System program that enables datasets arranged in the format of a two dimensional array to be viewed as colored patterns of numerical ranges MODVIEW is intended primarily to provide a convenient means of viewing MODFLOW input and output datasets and thus to make calibrating and evaluating MODFLOW ground water flow models more efficient MODVIEW reads the arrays to be viewed from ASCII input data files MODVIEW data input files consist of three general sections 1 a statement of the number of rows and columns of the model finite difference grid followed by 2 statements of the widths of the rows and columns of the model finite difference grid followed by 3 a statement of the array of data to be viewed MODVIEW numerical ranges consist of two numbers representing the high and low ends of an interval of the array of data to be viewed Because MODVIEW represents arrays of data as colored patterns of numerical ranges the user must define the numerical ranges prior to viewing Numerical ranges and corresponding colors can be defined by three different methods 1 automatic definition by MODVIEW 2 interactive definition by the user or 3 external definition through the use of control input files MODVIEW screen output consists of three types of displays 1 a primary display 2 subarea displays and 3 zoom reference displays The primary display consists of2. St Johns River Water Management District v MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA AE SA SE RPA PE ET OR LT St Johns River Water Management District vi Contents Sa I FE HN MN a CONTENTS List of Figures s Viii INTRODUCTION esu Pp ep SC 1 GUIDE POR USE ed p S a a p stt ud 3 Data Input Miles psies os dace sins e eu ua NR RU 3 Format of Data Input Files 3 Additional Information on Data Input Files 5 Defining Numerical Ranges 5 General Description s 2 2 4 wa SG Ea Saw ele 5 Options for Defining Numerical Ranges 6 Automatic Definition of Numerical Ranges 7 Interactive Definition of Numerical Ranges 7 External Definition Using Control Input Files 8 Representation of Inactive Cells 14 MODVIEW Output 833 ace do eye s 14 Screen Outputs tone es 14 Primary Display pee rus 14 Subdrea Displays i e ee 15 Zoom Reference Displays 15 Output oh ost thea ac bed 19 Ensuring Correct Grid Aspect Ratios 19 Replacing an Existing Array of Data 20 Running MODVIEW or ASPECT 20 Exiting MODVIEW xm EAT CE 20 Turning off Monitor Gr
3. a legend in which the numerical ranges are referenced to the colors being used to represent them Plot and or legend titles are displayed as well if specified Figure 5 The primary display is drawn initially without user specification Subarea Displays Subarea displays consist of a specified subarea of the MODFLOW finite difference grid superimposed onto a corresponding colored pattern of numerical ranges labeled with row and column numbers accompanied by plot and or legend titles if specified Figure 6 Subarea displays are useful for focusing zooming on areas of the grid that cannot be seen adequately in the primary display To Zoom a subarea the user should press ENTER type 2 and press ENTER again after the primary display has been drawn MODVIEW then prompts for the beginning and ending row numbers and column numbers of the subarea to be zoomed In each case the user should respond by typing in the two numbers separated by a blank space or comma MODVIEW will then draw the subarea display Other subareas ranging in size from one cell to the entire finite difference grid i e the primary display can be displayed thereafter by repeating this procedure Zoom Reference Displays Zoom reference displays consist of the overall MODFLOW finite difference grid with only the Zoomed subarea filled in with colors an accompanying legend and if specified plot and or legend titles Figure 7 Zoom reference displays show the po
4. assumed to be clustered about the mean The low end of range one is then set equal to AMIN and the high end is calculated as follows XHIGH XLOW XINTER where XHIGH is the high end of range number one and XLOW is the low end of range number one The low end of range number two is then equated to the high end of range number one and the high end is calculated according to the stated equation This is repeated for each of the remaining numerical ranges If XHSTD is greater than AMAX or XLSTD is less than AMIN then the second approach is used St Johns River Water Management District 28 Appendix EEE Ne ae M UE ee Second Approach In the second approach the data values are assumed to be more evenly distributed with respect to the mean therefore 14 numerical ranges of equal size are defined as follows Ranges 1 through 14 AMAX AMIN 14 0 XINTER Once the interval size of the 14 numerical ranges is established the high and low ends of the numerical ranges are calculated as before EXTERNAL DEFINITION USING RELATIVE CONTROL INPUT FILES MODVIEW converts the decimal fractions as specified in the relative control input file to corresponding numerical ranges To do this the decimal fractions are multiplied by the difference in the maximum and minimum values of the array of data to determine the differences in the high and low ends o
5. such as Pizzaz Plus Application Techniques 1990 Applications of MODVIEW need not be limited to MODFLOW datasets as MODVIEW can be used to view any dataset that can be arranged in the format of a two dimensional array St Johns River Water Management District MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA SS TT I EST TT AA 22222 22222 22242242 WU te Wh 222222 222 222282 WLUW EG 2222 UUD 2222122 LALA AAA Figure 1 222222222 2222022224228 EE Uta Wl Vl 222222 2222 22 Sample plot of a transmissivity array feet squared per day D 2BBE B5 350 05 50 05 0 05 9 55096E 05 lt lt D 2BBE B5 2 B 2BBE B5 D 3BBE B Vv B 3BDE D6 D 45BE B6 AAA VANI MODVIEW representation of a MODFLOW transmissivity array St Johns River Water Management District 2 Guide for Use GUIDE FOR USE DATA INPUT FILES MODVIEW data input files consist of three general sections 1 a statement of the number of rows and columns of the model finite difference grid to be viewed followed by 2 statements of the widths of the rows and columns of the model finite difference grid followed by 3 a statement of the array of data values
6. to viewed Format of Data Input Files MODVIEW data input files are free format ASCII files Figure 2 Data are stated according to the following order NROWS NCOLS YDELT 1 YDELT NROWS XDELT 1 XDELT NCOLS AULA A 1 NCOLS rr A NROWS 1 A NROWS NCOLS NROWS Number of rows of the model finite difference grid NCOLS Number of columns of the model finite difference grid YDELT Widths of rows of the model finite difference grid XDELT Widths of columns of the model finite difference grid A Array of data to be viewed St Johns River Water Management District juauaSvuny 12015 15 File Contents oo 0 0 0 5 0 0 3y 0 0 0 0 1 0 Explanations Number of rows Widths of rows Widths of columns Row Row Row Row Row Row of of of of of of array array array array array array number of columns of of of of of of data data data data data data Note 999 0s in rows 4 5 and 6 indicate inactive cells Figure 2 Sample input data file MOTAGOW ONILVNIVAS V Guide for Use Additional Information Concerning Data Input Files Each member of an A array must be separated by a blank space from the one preceding it and the one following it Figure 2 The negative sign of a negative data value is part of the value Therefore a blank space must separat
7. DFLOW user s manual McDonald and Harbaugh 1988 In MODVIEW the user is prompted to specify whether not inactive cells are to be represented in the dataset to be viewed If the user indicates that inactive cells are to be represented MODVIEW prompts the user to specify the number that is being used to represent inactive cells in the A array This information must be supplied to enable the program to distinguish this number from the other members of the A array MODVIEW will display grid cells that correspond to the positions of this number in the A array as inactive MODVIEW displays inactive cells by filling them with white or black according to user specification MODVIEW prompts the user to specify either white or black following the prompt by entering the representative number Inactive cells are defined as such in the legend MODVIEW OUTPUT Screen Output MODVIEW screen output consists of three types of displays 1 a primary display 2 subarea displays and 3 zoom reference displays Compatible graphics cards include EGA VGA and super VGA SVGA Primary Display The primary display consists of the entire MODFLOW finite difference grid superimposed onto the colored St Johns River Water Management District 14 Guide for Use PS eNO ET EE Pe RR es PALE oe ee AE ONL eats oe ee ol pattern of numerical ranges labeled with row and column numbers and accompanied by
8. E Number of numerical ranges to be defined maximum is 15 XL Low ends of numerical ranges XH High ends of numerical ranges NCOLOR Numbers representing colors that correspond to numerical ranges NUMTITE1 Number of 26 character alphanumeric strings to be specified as the overall plot title range is zero to five PTITLE Alphanumeric strings specified as plot title Maximum length per string is 26 characters PTITLE is not specified if NUMTITEI is specified as zero St Johns River Water Management District 10 Guide for Use NUMTITE2 Number of 26 character alphanumeric strings to be specified as the legend title range is zero to three LTITLE Alphanumeric strings specified as legend title Maximum length per string is 26 characters LTITLE is not specified if NUMTITE2 is specified as zero Relative Control Input Files In relative control input files decimal fractions are specified in place of numerical ranges to account for uncertainty in the maxima and minima of the different A arrays to be viewed Figure 4 The specification of decimal fractions precludes instances in which members of an A array are either less than the low end of the first numerical range or greater than the high end of the last numerical range of the array The sum of the decimal fractions must be 1 0 A set of five such decimal fractions could be stated as follows DECIMAL FRACTION 1 0 10 DECIMAL FRACTION 2 0 40 DECIMAL FRACTION 3 0 10 DECIMAL FRACT
9. ION 4 0 20 DECIMAL FRACTION 5 0 20 Using the decimal fractions MODVIEW calculates the high and low ends of the corresponding numerical ranges based on the maximum and minimum values of the A array to be viewed see appendix Information is entered into the relative control input file in the following order 1 HEADER r 2 NRANGE 3 NPER 1 NPER NRANGE St Johns River Water Management District 11 wM 42015 15 File Contents Explanations Header indicating relative control file Number of numerical ranges Decimal fraction corresponding to range Decimal fraction corresponding to range Decimal fraction corresponding to range Decimal fraction corresponding to range Decimal fraction corresponding to range Color corresponding to range 1 blue Color corresponding to range 2 light blue Color corresponding to range 3 white Color corresponding to range 4 yellow Color corresponding to range 5 green Number of plot text strings Example MODVIEW Plot Plot text string 1 Derived using a relative Plot text string 2 control file Plot text string 3 2 Number of legend text strings Hydraulic Head Residuals Legend text string 1 feet Legend text string 2 5 0 0 0 0 1 3 5 7 8 3 I Figure 4 Sample relative control input file MOT1343QON SNILVNIVAS WVWHDOdd V M3lIAGONW Guide for Use 4 NCOLOR NC
10. NNANNNNNNNNN NANN 1 INARA NAAN NSA ANI ISNNNNNNINI NN NAN RANA NAAN Subarea display of rows 1 4 and columns 1 3 of the finite difference grid of Figure 5 Figure 6 St Johns River Water Management District 17 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA Figure 7 St Johns River Water Management District 18 Example MODUIEM Plot Derived using an absolute control file gt Hudraulic Head Residuals feet B 1BBE4D2 B 5BBE4B1 425 0 50 01 B 3BBE B1 x 8 388E B1 lt lt 8 Mics B BBBE DB lt lt 20 1 H B 20BE4D1 DB 48BE4B1 Zoom reference display corresponding to the subarea display of Guide for Use Hard Copy Output MODVIEW has no built in drivers for hard copy production However hard copies of MODVIEW screen output can be produced using screen capture programs such as Pizzaz Plus Application Techniques 1990 Screen capture programs enable MODVIEW output to be produced in black and white or in color Output can be printed on dot matrix laser or color printers Ensuring Correct Grid Aspect Ratios MODVIEW version 1 0 is compatible with EGA VGA and SVGA graphics cards and color monitors Most monitors have a switch located on the panel front or back with which to control the height of the scree
11. OLOR NRANGE 5 6 PTITLE 1 PTITLE NUMTITE1 7 NUMTITE2 8 LTITLE 1 LTITLE NUMTITE2 al r NRANGE NPER NCOLOR 1 PTITLE NUMTITE2 Alphanumeric character denoting that the file is a relative control input file Number of numerical ranges to be specified maximum is 15 Decimal fractions from which numerical ranges are determined Numbers representing the colors that correspond to numerical ranges Number of 26 character alphanumeric strings to be specified as the overall plot title range is zero to five Alphanumeric strings specified as plot title Maximum length per string is 26 characters PTITLE is not specified if NUMTITEI is specified as zero Number of 26 character alphanumeric strings to be specified as the legend title range is zero to three St Johns River Water Management District 13 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA LTITLE Alphanumeric strings specified as legend title Maximum length per string is 26 characters LTITLE is not specified if NUMTITE2 is specified as zero REPRESENTATION OF INACTIVE CELLS In many MODFLOW datasets grid cells exist for which data values are not specified or calculated Such cells are referred to as inactive cells The positions that correspond to these cells in the A array are filled with a number that otherwise would not be expected The number 999 0 is used for this purpose in sample problems shown in the MO
12. Technical Publication SJ94 6 MODVIEW VERSION 1 0 A GRAPHICAL KERNEL SYSTEM PROGRAM FOR EVALUATING MODFLOW DATA by Douglas W Durden St Johns River Water Management District Palatka Florida 1994 Northwest Florida Water Management District Suwannee River Water Management District St Johns River Southwest amp Florida 9 Water Management District South Florida Water Management District The St Johns River Water Management District SJRWMD was created by the Florida Legislature in 1972 to be one of five water management districts in Florida It includes all or part of 19 counties in northeast Florida The mission of SJRWMD is to manage water resources to ensure their continued availability while maximizing environmental and economic benefits It accomplishes its mission through regulation applied research assistance to federal state and local governments operation and maintenance of water control works and land acquisition and management Technical reports are published to disseminate information collected by SJRWMD in pursuit of its mission Copies of this report can be obtained from Library St Johns River Water Management District P O Box 1429 Palatka FL 32178 1429 Phone 904 329 4132 Executive Summary EXECUTIVE SUMMARY MODVIEW Version 1 0 is a Graphical Kernel System program that enables datasets arranged in the format of a two dimensional array i e sets of related number
13. Techniques Inc 1990 Pizzaz Plus user s guide 10 Lomar Park Drive Pepperell Massachusetts Coschi G and J B Schueler 1986 WATFOR 77 language reference WATCOM Publications Limited 415 Phillip Street Waterloo Ontario 1987 WATFOR 77 user s guide WATCOM Publications Limited Waterloo Ontario McDonald M G and A W Harbaugh 1988 A modular three dimensional finite difference ground water flow model Techniques for Water Resources Investigations 6 A1 Denver Colorado U S Geological Survey Sun Microsystems Inc 1990 SunGKS 4 0 reference manual 2550 Garcia Avenue Mountain View California Yach D P 1987 WATCOM GKS graphics tutorial and reference WATCOM Publications Limited Waterloo Ontario a es 0 2 St Johns River Water Management District 25 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA o ___ __ _ ___ _______ gt _ St Johns River Water Management District 26 Appendix APPENDIX NOTES ON MODVIEW PROCEDURES FOR DEFINING NUMERICAL RANGES AUTOMATIC DEFINITION OF NUMERICAL RANGES Automatic definition of numerical ranges is performed using one of two different approaches depending on the mean standard deviation minimum and maximum values of the A array First Approach The first approach is used whenever the minimum and maximum values of the array of data are more than one standard deviation from the mean To determi
14. VIEW will use the measurements stated in the file to approximate the actual aspect ratio of the finite difference grid being represented If the file Aspect is not present then MODVIEW will use default values of the lengths of the horizontal and vertical lines drawn by the ASPECT program In such cases the aspect ratio of the grid drawn by MODVIEW will differ from the aspect ratio of the actual model grid to an extent that depends on the setting of the screen aspect ratio REPLACING AN EXISTING ARRAY OF DATA To replace one A array by another A array without first exiting MODVIEW the user should press ENTER type r and press ENTER again after the primary display subarea display or zoom reference display has been drawn MODVIEW then prompts the user to enter the name of the new data input file RUNNING MODVIEW oR ASPECT Prior to running MODVIEW or ASPECT the WATCOM GKS library of graphics functions Yach 1987 must be loaded into computer memory To load the graphics library the user should copy the executable code WGKS EXE from the accompanying diskette to the desired computer disk drive type WGKS and press ENTER MODVIEW or ASPECT can then be run by copying the MODVIEW or ASPECT executable code MODVIEW EXE or ASPECT EXE from the enclosed diskette to the desired disk drive typing MODVIEW or ASPECT and pressing ENTER EXITING MODVIEW To exit MODVIEW the user should press ENTER type 4 and pr
15. aphics Mode 21 PROGRAM PORTABILITY edd veo REM ER RENS 22 SUMMARY cie Rud a vba VINE VE E eos eee 23 IR GPT ON COS o eir eate es usta Nepos eani ace 25 Appendix Notes on MODVIEW Procedures for Defining Numerical Ranges s 024 s eR eR cas vate es 27 St Johns River Water Management District vii MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA FIGURES 1 MODVIEW representation of a MODFLOW transmissivity ALTA eds duas x e db oes eran y tica REC RS ea RC A 2 2 Sample input data file elles 4 3 Sample absolute control input file 9 4 Sample relative control input file 12 5 Primary display corresponding to the sample input file of Figure 2 and the absolute control input file of Figure 3 16 6 display of rows 1 4 and columns 1 3 of the finite difference grid of Figure 5 17 7 Zoom reference display corresponding to the subarea display of Figure x dep ce IG ease EA 18 _ _ St Johns River Water Management District viii Introduction INTRODUCTION MODVIEW Version 1 0 is a Graphical Kernel System program that enables datasets arranged in the format of a two dimensional array to be viewed as colored patterns of numerical range
16. e 2 red 3 light blue 4 dark blue 5 white 6 army green 7 yellow 8 green 9 orange 10 brown 11 purple 12 gray 13 pink 14 dark brown 15 black St Johns River Water Management District 7 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA After the colors are specified MODVIEW prompts the user to indicate whether titles are desired for the overall plot and or legend If the user indicates that titles are desired MODVIEW prompts the user to specify them MODVIEW then prompts the user to enter the name of a control input file in which the definitions of the numerical ranges the corresponding colors and the display titles are to be stored External Definition Using Control Input Files To define the numerical ranges externally using a control input file the user should select option 3 in response to the prompt to choose a method for defining the numerical ranges MODVIEW will then prompt the user to specify the name of a pre existing control input file Control input files are free format ASCII files in which statements of the numerical ranges the corresponding colors and the plot and or legend titles are stored Storing these data precludes respecifying the numerical ranges the corresponding colors and the plot and or legend titles each time the same A array or a similar A array is to be viewed Control input files are of two types absolute and relative Absolute control input files are m
17. e negative signs from the preceding data value Lines of data cannot be extended beyond column 80 They can however be wrapped around to as many succeeding lines of the input file as necessary DEFINING NUMERICAL RANGES General Description MODVIEW represents arrays of data as colored patterns of numerical ranges Therefore numerical ranges must be defined for each A array prior to viewing A numerical range is defined by two numbers a low end and a high end The low end of each numerical range is identical to the high end of the preceding numerical range For example a set of five numerical ranges could be defined as follows Once the numerical ranges are defined MODVIEW assigns every member of the A array to one of the ranges providing every member of the A array falls within one of the ranges To be assigned to a given numerical range a member of the A array must be greater than or equal to the low end of the range and St Johns River Water Management District 5 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA _______ __ PST 2 PS DOS WORE TEES less than the high end An exception occurs only when the maximum value of an array of data and the high end of the last numerical range are identical In such a case the maximum value of the A array is included in the last range A maximum of 15 numerical ranges can be defined Every member of the A array must be assigned to one of the defined numerical ranges except membe
18. ess ENTER again after the primary display subarea display or St Johns River Water Management District 20 Guide for Use zoom reference display has been drawn The user is also given the option of exiting while being prompted to specify a method for defining the numerical ranges TURNING OFF MONITOR GRAPHICS MODE Running MODVIEW or ASPECT changes the normal operating mode of a monitor This change will result in a slowing of the scrolling function and sometimes in other abnormal monitor behavior when the monitor is used for other applications To restore normal operating mode the user should execute the DOS command MODE CO80 St Johns River Water Management District 21 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA PROGRAM PORTABILITY The MODVIEW source code was compiled using the WATFOR 77 FORTRAN compiler Coschi and Schueler 1986 and 1987 and WATCOM GKS graphics library Yach 1987 The resulting MODVIEW executable code will run on IBM compatible personal computers equipped with EGA VGA or SVGA color graphics cards and color monitors A UNIX version of MODVIEW for use on SUN workstations can be created for use with the SunGKS library of GKS functions Sun Microsystems 1990 MM St Johns River Water Management District 22 Summary E I
19. f the corresponding numerical ranges The low end of range one is then equated to the minimum value of the array of data The high end is calculated according to the following equation XHIGH XDOM x XPER XLOW where XHIGH is the high end of the numerical range XDOM is the difference in maximum and minimum values of the array of data XPER is the specified decimal fraction and XLOW is the low end of the numerical range The low end of range number two is defined by equating it to the high end of range number one The high end of range number two is determined according to the stated equation This procedure is repeated until the high and low ends of all the numerical ranges have been calculated St Johns River Water Management District 29
20. n image On some monitors a switch for controlling the width of the screen image is provided also The ratio of the height of the screen image to the width of the screen image is the screen aspect ratio The aspect ratios of finite difference grids drawn by MODVIEW are dependent on the screen aspect ratio By using the program ASPECT which is included on the enclosed diskette with MODVIEW the aspect ratios of grids plotted by MODVIEW can be properly adjusted to a given setting of the screen aspect ratio The ASPECT program causes a horizontal line and a vertical line to be drawn at a right angle to one another To adjust the aspect ratio of MODVIEW grids the user should measure the lengths of the lines with a ruler When making the measurements the ruler should be held parallel to the panel that frames the glass portion of the monitor not bent to match the curvature of the screen The measurements should be entered into an ASCII input file called Aspect in the following order HORIZL VERTL HORIZL The length of the horizontal line VERTL The length of the vertical line St Johns River Water Management District 19 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA These measurements can be stated in any unit system The file Aspect should be placed in the DOS directory from which MODVIEW is to be executed During each run MODVIEW will search for this file only in the current directory If the file Aspect is present MOD
21. ne whether or nor this is the case MODVIEW first calculates the mean and standard deviation of the A array It then determines the upper and lower bounds of the interval of data values within one standard deviation of the mean as follows XHSTD ACAV STDEV XLSTD ACAV STDEV where XHSTD and XLSTD are the upper and lower bounds respectively of the interval of data values within one standard deviation of the mean ACAV is the mean of the array of data and STDEV is the standard deviation of the array of data If XHSTD is less than the maximum value and XLSTD is greater than the minimum value of the array of data then the minimum and maximum values of the A array are more than one standard deviation from the mean and the first approach is used to define the numerical ranges In this approach the sizes of the 14 numerical ranges are determined as follows St Johns River Water Management District 27 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA Ranges 1 through 4 XLSTD AMIN 4 0 XINTER Ranges 5 through 10 XHSTD XLSTD 6 0 XINTER Ranges 11 through 14 AMAX XHSTD 4 0 XINTER where XINTER is the size of the numerical ranges and AMIN and are the minimum and maximum values of the A array respectively A larger number of ranges is devoted to the interval of data values within one standard deviation of the mean because in this approach a relatively large number of data values are
22. ost applicable for use in viewing the same array of data more than once Relative control input files are most applicable for viewing several different arrays of data Absolute Control Input Files In absolute control input files numerical ranges are stated as absolute numerical values Figure 3 Information is entered in the following order 1 HEADER a 2 3 XH 1 XL NRANGE XH NRANGE St Johns River Water Management District 8 wM 42213 5 15 6 File Contents Explanations Header indicating absolute control file Number of numerical ranges Range number 1 Range number 2 Range number 3 Range number 4 Range number 5 Color corresponding to range Color corresponding to range Color corresponding to range Color corresponding to range Color corresponding to range Number of plot text strings Example MODVIEW Plot Plot text string 1 i Derived using an absolute Plot text string 2 control file Plot text string 3 i 2 Number of legend text strings Hydraulic Head Residuals Legend text string 1 feet Legend text string 2 Figure 3 Sample absolute control input file asf MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA 4 NCOLOR 1 NCOLOR NRANGE 5 NUMTITE1 6 PTIILE 1 PTITLE NUMTITE1 7 2 8 LTITLE 1 LTITLE NUMTITE2 a Alphanumeric character denoting that the file is an absolute control input file NRANG
23. ree different methods 1 automatic definition by MODVIEW 2 interactive definition by the user or 3 external definition by the user through the use of control input files MODVIEW St Johns River Water Management District 6 Guide for Use prompts the user to choose one of these options after reporting the minimum and maximum values of the A array Automatic Definition of Numerical Ranges To choose automatic definition the user should select option 1 in response to the prompt to select a method for defining the numerical ranges and assigning colors MODVIEW then prompts the user to indicate whether or not titles for the overall plot and or legend are desired If the user indicates that titles are desired MODVIEW prompts the user to specify them The A array is then displayed as 14 numerical ranges Interactive Definition of Numerical Ranges To define the numerical ranges interactively the user should select option 2 in response to the prompt to choose a method for defining numerical ranges MODVIEW will then prompt the user to enter the number of numerical ranges to be defined Next MODVIEW prompts the user to begin entering the numerical ranges starting with range one Once all the numerical ranges are defined MODVIEW prompts the user to specify the colors that are to be used to represent the numerical ranges The colors are specified by entering representative numbers displayed next to the names of the colors 1 blu
24. rs representing inactive grid cells which are described later Therefore if members of an A array are less than the low end of the first numerical range or greater than the high end of the last numerical range a run time error will result To help prevent this MODVIEW determines and reports the minimum and maximum values of each A array prior to prompting the user to define the numerical ranges For an array of residuals of hydraulic head in which the minimum data value is 5 2 feet ft and the maximum data value is 10 3 ft the value of 5 2 ft would be assigned to the first numerical range in the set of numerical ranges defined above and the value of 10 3 ft would be assigned to the fifth numerical range If the minimum value were 5 0 ft instead of 5 2 ft however this value would be assigned to the second numerical range and no values would be assigned to the first numerical range If the maximum value of the dataset were 15 0 ft instead of 10 3 ft it would still be assigned to the fifth numerical range however A run time error would result if the minimum data value were number less than 10 0 ft or if the maximum data value were a number greater than 15 0 ft because such values would not fall into one of the defined numerical ranges Redefinition of the first and or fifth numerical range would be required in such a case Options for Defining Numerical Ranges The numerical ranges and corresponding colors can be defined by th
25. s MODVIEW is intended primarily to provide a convenient means of viewing MODFLOW McDonald and Harbaugh 1988 input and output datasets and thus to make calibrating and evaluating MODFLOW ground water flow models more efficient MODVIEW is particularly useful for viewing distributions of aquifer and confining unit properties that in many cases do not lend well to contouring Examples of such distributions are leakance and transmissivity distributions Figure 1 Other types of datasets that are well suited for viewing with MODVIEW include distributions of simulated hydraulic head hydraulic head residuals drawdowns well withdrawal rates and recharge discharge rates MODVIEW displays a given dataset by determining the range into which each data value falls and then filling the corresponding cell of the model finite difference grid with a color that has been specified to represent the determined range MODVIEW then superimposes the model finite difference grid onto the resulting patterns of ranges labels the finite difference grid with row and column numbers and displays the specified ranges and the corresponding representative colors in an accompanying legend It can enlarge zoom specified subregions of a finite difference grid for detailed viewing to better accommodate finite difference grids that consist of relatively large numbers of rows and columns Hard copies of MODVIEW output can be produced through the use of screen capture programs
26. s arranged in a format of rows and columns to be viewed as colored patterns of numerical ranges The St Johns River Water Management District extensively uses the U S Geological Survey model MODFLOW a ground water flow model in performing ground water studies MODFLOW input and output data files consist largely of two dimensional arrays These types of arrays are used in MODFLOW to represent spatially distributed values of hydraulic parameters such as transmissivity leakance and hydraulic head MODVIEW is intended primarily to provide a convenient means of viewing MODFLOW datasets and thus to make calibrating and evaluating MODFLOW ground water flow models more efficient MODVIEW screen output consists of three types of displays 1 a primary display 2 subarea displays and 3 zoom reference displays The primary display shows the entire model grid Subarea displays show enlargements of specified subareas of the model grid Zoom reference displays show the position of a zoomed subarea with respect to the entire model grid MODVIEW will run on IBM compatible personal computers equipped with EGA VGA or SVGA color graphics cards and color monitors Hard copy plots of MODVIEW output can be produced with the use of screen capture programs such as Pizzaz Plus Screen capture programs enable MODVIEW output to be produced in black and white or in color Output can be printed on dot matrix laser or color printers a a MC A
27. sition of a zoomed subarea with respect to the entire model finite difference grid The user instructs MODVIEW to draw a zoom reference display by pressing ENTER typing zr and pressing ENTER again after the zoomed subarea has been drawn The user recovers the corresponding subarea display by pressing ENTER typing b and pressing ENTER again after the zoom reference display has been drawn St Johns River Water Management District 15 A PROGRAM FOR EVALUATING MODFLOW DATA MODVIEW Example Plot Derived using an absolute control file NNSNNSNNNNSNNNNNRNNNNN Hudraulic Head Residuals Feet wl E n m l a s m m m SAS ws SBBE4B1 gt B 3BBE4D1 81 lt lt B DOBE DD 3 ex DBBE BB DB 2BBE D1i 2 QBBE4BL lt D 4BDE4Di B nact 22 gs 1ve m _ Primary display corresponding to the sample input file of Figure 2 and the absolute control input file of Figure 3 Figure 5 St Johns River Water Management District 16 Guide for Use Derived using an absolute control file Example MODUIEM Plot Hudraulic Head Residuals feet a Li e m in m 1 x m a m a SBBE BL B 3BBE4B4 3BBE4D1 B BBBE OR BBBE DD 200 01 gt NC B nacti ve 24 1 4BBE 3 200 01 NAAN
28. the entire MODFLOW finite difference grid superimposed onto the colored pattern of numerical ranges labeled with row and column numbers and accompanied by a legend in which the numerical ranges are referenced to the colors used to represent them Plot and or legend titles are displayed as well if specified Subarea displays consist of a specified subarea of the MODFLOW finite difference grid superimposed onto a corresponding colored pattern of numerical ranges labeled with row and column numbers and St Johns River Water Management District 23 MODVIEW A PROGRAM FOR EVALUATING MODFLOW DATA accompanied by a legend and if specified plot and or legend titles Zoom reference displays consist of the overall MODFLOW finite difference grid with only the zoomed subarea filled in with colors an accompanying legend and if specified plot and or legend titles MODVIEW will run on IBM compatible personal computers equipped with EGA VGA or SVGA color graphics cards and color monitors Hard copy plots of MODVIEW output can be produced with the use of screen capture programs such as Pizzaz Plus Screen capture programs enable MODVIEW output to be produced in black and white or in color Output can be printed on dot matrix laser or color printers ____________________________ __ ______________________ _ St Johns River Water Management District 24 References a a ae Ge EN REFERENCES Application
Download Pdf Manuals
Related Search