Record Search Query: [Keyword='Ground Water']
MODTOOLS: Computer Programs for Translating Ground-Water Model Data Into a Geographic Information System
Entry ID: USGS_MODTOOLS
Abstract: MODTOOLS is a set of computer programs for translating data of the ground-water
model, MODFLOW, and the particle-tracker, MODPATH, into a Geographic
Information System (GIS). MODTOOLS translates data into a GIS software called
ARC/INFO. MODFLOW is the recognized name for the U.S. Geological Survey Modular
Three-Dimensional Finite-Difference Ground-Water Model. MODTOOLS uses the data
arrays input ... to or output by MODFLOW during a ground-water flow simulation to
construct several types of GIS output files. MODTOOLS can also be used to
translate data from MODPATH into GIS files. MODPATH and its companion program,
MODPATH-PLOT, are collectively called the U.S. Geological Survey
Three-Dimensional Particle Tracking Post-Processing Programs. MODPATH is used
to calculate ground-water flow paths using the results of MODFLOW and
MODPATH-PLOT can be used to display the flow paths in various ways. MODTOOLS
uses the particle data calculated by MODPATH to construct several types of GIS
MODTOOLS uses particle information recorded by MODPATH such as the row, column,
or layer of the model grid, to generate a set of characteristics associated
with each particle. The user can choose from the set of characteristics
associated with each particle and use the capabilities of the GIS to
selectively trace the movement of water discharging from specific cells in the
model grid. MODTOOLS allows the hydrogeologist to utilize the capabilities of
the GIS to graphically combine the results of the particle-tracking analysis,
which facilitates the analysis and understanding of complex ground-water flow
[Summary provided by the USGS.]
ISO Topic Category
Access Constraints MODTOOLS is written in standard Fortran 77 and, generally, easily installed.
MODTOOLS requires the use of ARC/INFO software to run a set of AML programs to
create GIS output.
Harbaugh, A.W., 1990, A simple contouring program for gridded data:
U.S.Geological Survey Open-File Report 90144, 37 p.
Harbaugh, A.W., and McDonald, M.G., 1996, User's documentation for
MODFLOW96, an update to the U.S. Geological Survey modular finite-difference ground-water flow model: U.S. Geological Survey Open-File Report 96485, 56 p.
Hinkle, S.R., and Snyder, D.T., 1997, Comparison of
chlorofluorocarbon-age dating with particle- tracking results of a regional
ground-water flow model of the Portland Basin, Oregon and Washington: U.S.
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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. A1, 586 p.
Orzol, L.L., and Truini, M., in press, Evaluation of factors that
influence estimated zones of transport for six municipal wells in Clark County,
Washington: U.S. Geological Survey Water-Resources Investigations Report
97-4224, 114 p.
Pollock, D.W.,1994, User's guide for MODPATH/MODPATH-PLOT, version 3-A
particle tracking post-processing package for MODFLOW, the U.S. Geological
Survey finite-difference ground-water flow model: U.S. Geological Survey
Open-File Report 94464, [variously paged].
Snyder, D.T., Wilkinson, J.M. and Orzol, L.L., 1996, Use of a
ground-water flow model with particle tracking to evaluate ground-water
vulnerability, Clark County, Washington: U. S. Geological Survey Open-File
Report 96328, 71 p
Creation and Review Dates