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2000 E.
Allen Rd. Tucson, Arizona 85719 PHONE 520 - 670 - 6381 FAX 520 - 670 - 5550 |
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Located in SE Arizona surrounding the historic city of Tombstone, the 150 sq. km. Walnut Gulch Experimental Watershed was established in the early 1950's to study the role of watershed treatments on downstream water yield. The site was deemed typical of the black grama grass-brush dominated areas of southern New Mexico and Arizona.
Beginning in 1954, a network of recording precipitation gages was established. Since then, the network of recording precipitation gages has grown to the nearly 100 gages currently maintained by SWRC staff. Complementary to the precipitation gages, 25 flumes and weirs have been established within the Walnut Gulch Experimental Watershed defining subwatersheds ranging in size from 112 sq. km. to 0.3 sq. km.
The resultant network of measuring devices therefore constructs a nested design of subwatersheds and associated flumes.
In addition to hydrological measurements, basic meteorological data (daily precipitation, daily temperature maximums and minimums) for the National Weather Service Tombstone, Arizona station has been maintained by SWRC personnel since the early 1960's.
Data currently available for the Walnut Gulch Experimental Watershed
(location #63 in the ARS Water Data Center database):
precipitation
runoff
meteorological
data
For more information, please contact our database administrator .
GIS coverages have been created for Walnut Gulch using advanced mapping techniques, including the integration of large-scale orthophotos, a high-resolution DEM, and innovative aerial characterization. Construction of this database was made in cooperation with the University of Arizona's Advanced Resource Technology Lab.
Channel Network
Digital Elevation
Model Orthophotograph
Soils
Range Sites
Geology
Vegetation
Ownership
Subwatersheds
In 1990, a multidisciplinary field campaign was conducted over the Walnut Gulch Experimental Watershed during the months of June through September. A primary objective of the combined ground, aircraft, and satellite campaign was to assess the feasibility of utilizing remotely sensed data coupled with water and energy balance modeling for large-area estimates of fluxes in semiarid rangelands. The data collected from this project--Monsoon '90--is available through the ARS Water Data Center.
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This page maintained by Scott Miller
| USDA-ARS Southwest Watershed Research Center Tucson, Arizona Last Modified 3/29/2004 |
