SWAT groundwater input data
File type: Various data file
A gw file extension identifies a groundwater input file used by SWAT (Soil & Water Assessment Tool).
The file supplies groundwater-related data for a SWAT watershed model.
File type category:
Various data file
Date updated: October 22, 2026
SWAT (Soil & Water Assessment Tool) is watershed and water-resource simulation software developed by the USDA Agricultural Research Service and Texas A&M AgriLife Research. The Windows version uses several text-based input files, including files with the gw file extension.
A gw file contains groundwater information for a subbasin, including data about its shallow and deep aquifers. SWAT reads this information as part of the model input used to simulate the watershed.
Use SWAT on Microsoft Windows to use a gw file as part of a watershed model. The file is an input file rather than a document intended for standalone viewing.
Because SWAT input files are text-based, a plain-text editor can generally display the contents, but editing values outside SWAT can affect the model.
SWAT is capable of exporting *.gw files to other formats.
Software applications that handle other tasks involving gw files:
Microsoft Windows
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