Premium
SUMMARY OF MODIFICATIONS OF THE U.S. GEOLOGICAL SURVEY MODULAR, FINITE‐DIFFERENCE, GROUND‐WATER FLOW MODEL TO READ AND WRITE GEOGRAPHIC INFORMATION SYSTEM FILES 1
Author(s) -
Orzol Leonard L.,
McGrath Timothy S.
Publication year - 1993
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1993.tb03243.x
Subject(s) - modflow , geological survey , modular design , variable (mathematics) , computer science , database , directory , groundwater flow , groundwater , engineering , programming language , operating system , geology , mathematics , geotechnical engineering , paleontology , mathematical analysis , aquifer
The U.S. Geological Survey modular, three‐dimensional, finite‐difference, ground‐water flow model, commonly called MODFLOW, has been modified so that it can read and write files used by a geographic information system (GIS). The modified model program is called MODFLOWARC. The design of MODFLOWARC parallels the design of the ground‐water flow model program MODFLOW. The names of the variables, modules, and submodules used to explain the operations of MODFLOWARC were derived from the names used in MODFLOW. During the data input phase, MODFLOWARC reads array control records similar to the original control records of MODFLOW, except an additional variable is added. This additional variable is the name of the computer files containing array data in GIS format. Data output is achieved by setting record/input flags and by supplying a variable that is the name of the directory where the output data will be recorded. The modifications to MODFLOW were minimized so that MODFLOWARC will operate on an existing ground‐water flow model without modifying array control records.