Data Access Science & Research Publications Annual Reports Contacts 2000 E. Allen Rd. Tucson, Arizona 85719 PHONE 520 - 670 - 6381 FAX 520 - 670 - 5550

Overview

The USDA ARS SWRC maintains two principle geographic information systems (GIS) covering the Walnut Gulch Experimental Watershed and the Santa Rita Experimental Range, both of which are located in southern Arizona. These GIS databases have been constructed with a high resolution using orthogonalized aerial photography and advanced surface modeling in cooperation with the University of Arizona.

SWRC Database Locations

Walnut Gulch Experimental Watershed Santa Rita Experimental Range

Coverages

I. Walnut Gulch

Channel Network Digital Elevation Model Orthophotograph Soils Range Sites Geology Vegetation Ownership Subwatersheds

II. Santa Rita Experimental Range

SWRC SRER page

Lansat Images

Walnut Gulch Experimental Watershed (courtesy of the SALSA project). Santa Rita Experimental Range (courtesy of the U of A College of Ag).

GIS Data Sources

We have recently completed a survey of available GIS data for hydrologic modeling of the Lower Colorado River Basin. This page contains many links to outside data sources.

GIS Data Sources

In order to provide for maximum flexibility and integration with other software, the GIS databases maintained by the SWRC are in both ARC/INFO and GRASS. In the future, these GISs will be integrated with hydrologic simulation models and serve to parameterize our Decision Support System, currently under development.

SWRC home page Walnut Gulch GIS page SRER GIS page