Director Dallas L Peck

JR Manuel Lujan

Peter F Frenzel

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LISTINGS OF MODEL-INPUT VALUES FOR THE SIMULATION 
OF GROUND-WATER FLOW IN THE MESILLA BASIN, 
DOftA ANA COUNTY, NEW MEXICO, AND 
EL PASO COUNTY, TEXAS
Supplement to Water-Resources Investigations 
Report 91-4155 and to Open-File Report 88-305 
By Peter F. Frenzel
U.S. GEOLOGICAL SURVEY 
Open-File Report 91-455
Prepared in cooperation with the
U.S. SECTION, INTERNATIONAL BOUNDARY AND WATER COMMISSION-
UNITED STATES AND MEXICO
Albuquerque, New Mexico 
1992
U.S. DEPARTMENT OF THE INTERIOR 
MANUEL LUJAN, JR., Secretary
U.S. GEOLOGICAL SURVEY 
Dallas L. Peck, Director
For additional information 
write to:
District Chief
U.S. Geological Survey
Water Resources Division
Pinetree Corporate Centre
4501 Indian School Road NE, Suite
Albuquerque, New Mexico 87110
200
Copies of this report can 
be purchased from:
U.S. Geological Survey
Books and Open-File Reports
Federal Center
Box 25425
Denver, Colorado 80225
CONTENTS
Page 
Abstract................................................................. 1
Introduction............................................................. 1
Listings of model-input values........................................... 2
References cited......................................................... 4
 iii
LISTINGS OF MODEL-INPUT VALUES FOR THE SIMULATION OF GROUND-WATER 
FLOW IN THE MESILLA BASIN, DONA ANA COUNTY, NEW MEXICO,
AND EL PASO COUNTY, TEXAS
Supplement to Water-Resources Investigations 
Report 91-4155 and to Open-File Report 88-305 
by Peter F. Frenzel
ABSTRACT
This report contains listings of model input values (two diskettes) for 
the simulation of ground-water flow in the Mesilla Basin in Dona Ana County, 
New Mexico, and El Paso County, Texas. This simulation used the code for a 
modular, three-dimensional, finite-difference, ground-water flow model 
previously developed by the U.S. Geological Survey; the code also contains an 
added river package (RIV2). This report also contains a listing of the 
Fortran 77 code for the RIV2 package.
INTRODUCTION
This report contains listings of model input values (two diskettes) for 
the simulation of ground-water flow in the Mesilla Basin in Dona Ana County, 
New Mexico, and El Paso County, Texas. This simulation was done by Frenzel 
(1992) using the code for a modular, three-dimensional, finite-difference, 
ground-water flow model developed by McDonald and Harbaugh (1988) as altered 
by Miller (1988). Miller's (1988) RIV2 package was used in place of the river 
package of McDonald and Harbaugh (1988). In addition to required model input, 
this report contains a listing of the Fortran 77 code for the RIV2 package. 
The listings in this report are on 360-kilobyte IBM-PC* compatible diskettes.
*Use of trade names in this report is for identification purposes only and 
does not constitute endorsement by the U.S. Geological Survey.
LISTINGS OF MODEL-INPUT VALUES
Anticipated ground-water withdrawals in the Mesilla Basin might decrease 
streamflow in the Rio Grande and thus decrease the quantity of water that is 
available to downstream users. A previous model (Frenzel and Kaehler, 1990) 
was revised to assess the effects of existing ground-water withdrawals on 
streamflow in the Rio Grande and to provide a tool for the assessment of the 
effects of future ground-water withdrawals. The revision included a 10-year 
extension, from 1975 through 1985, of the original simulation period and a 
decrease in the simulated depth of the basin fill that is based on recent 
geologic interpretations.
The basin forms a three-dimensional ground-water system. The lateral 
extent and depth of the system are defined by bedrock that has values of 
hydraulic conductivity that are much less than those of the basin fill. Most 
flow into and out of the ground-water system occurs at or near land surface in 
the Mesilla Valley and is the result of a complex interaction of the river, 
drains, canals, evapotranspiration, and water withdrawals from wells (Frenzel 
and Kaehler, 1990).
The model has 4 layers, 36 rows, and 64 columns, and features a stream 
boundary that keeps an account of the simulated streamflow of the river and 
drains. The simulated river and drains gain and lose flow at various places 
along their length, and losses at any point are limited to no more than the 
simulated streamflow at that point.
Each input listing in this report contains values for a particular 
modular-model package as defined and described by McDonald and Harbaugh (1988) 
with the exception of the "river package." River input is for the RIV2 
package developed by Miller (1988). Listing names on the diskettes have a 
numeric suffix. Listing 1 is the Fortran 77 source code for the RIV2 package. 
Model-input values for the steady-state simulation are contained in 
listings 2-8, and input values for the transient simulation are contained in 
listings 9-14. Listing 6 is for both simulations.
Listing
name Description
RIV2.L1 Fortran 77 program for the RIV2 package 
Input for the steady-state simulation:
SSBASIC.L2 Basic package
SSBCFIN.L3 Block-centered flow package
SSET.L4 Evapotranspiration package
SSRIVER.L5 RIV2 river package
SSSIPIN.L6 Strongly Implicit Procedure package
SSWELLS.L7 Well package
SZOCTRL.L8 Basic package output, control option
Input for the transient simulation:
TRBASIC.L9 Basic package
TRBCFIN.L10 Block-centered flow package
TRET.L11 Evapotranspiration package
TRRIVER.L12 RIV2 river package
TRWELLS.L13 Well package
TZOCTRL.L14 Basic package output control option
REFERENCES CITED
Frenzel, P.F., 1992, Simulation of ground-water flow in the Mesilla Basin, 
Dona Ana County, New Mexico, and El Paso County, Texas (Supplement to 
Open-File Report 88-305): U.S. Geological Survey Water-Resources 
Investigations Report 91-4155, 152 p.
Frenzel, P.F., and Kaehler, C.A., 1990, Geohydrology and simulation of ground- 
water flow in the Mesilla Basin, Dona Ana County, New Mexico, and El Paso 
County, Texas, with a section on Water quality and geochemistry, by S.K. 
Anderholm: U.S. Geological Survey Open-File Report 88-305, 179 p. (also 
to be available as U.S. Geological Survey Professional Paper 1407-C [in 
press]).
McDonald, M.G. , and Harbaugh, A.W., 1988, A modular three-dimensional finite- 
difference ground-water flow model: U.S. Geological Survey Techniques of 
Water-Resources Investigations, book 6, chap. Al, various pagination.
Miller, R.S., 1988, User's guide for RIV2--A package for routing and 
accounting of river discharge for a modular, three-dimensional, finite- 
difference, ground-water flow model: U.S. Geological Survey Open-File 
Report 88-345, 33 p.


LISTINGS OF MODEL-INPUT VALUES FOR THE SIMULATION OF GROUND-WATER FLOW IN THE MESILLA BASIN, DOftA ANA COUNTY, NEW MEXICO, AND EL PASO COUNTY, TEXAS Supplement to Water-Resources Investigations Report 91-4155 and to Open-File Report 88-305 Open-File Repor

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LISTINGS OF MODEL-INPUT VALUES FOR THE SIMULATION OF GROUND-WATER FLOW IN THE MESILLA BASIN, DOftA ANA COUNTY, NEW MEXICO, AND EL PASO COUNTY, TEXAS Supplement to Water-Resources Investigations Report 91-4155 and to Open-File Report 88-305 Open-File Repor

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