tucson.ars.ag.govSouthwest Watershed Research Center : USDA ARS

Research : USDA ARS -- Skip to main content An official website of the United States government Here's how you know The .gov means it’s official. Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. Menu Agricultural Research Service U.S. DEPARTMENT OF AGRICULTURE Southwest Watershed Research Center: Tucson, AZ Research Research Projects Publications Collaborations News Software People Staff Listing Careers About SWRC Search small Search ARS Home About ARS Contact Us -- Photo Carousel Links Mission: To develop knowledge and technology for sound management of water, plants and soil in semiarid regions Search through our publications list Our technology transfer tools make a difference The SWRC operates the Walnut Gulch Experimental Watershed in southeastern Arizona as an outdoor laboratory for studying semiarid rangeland hydrologic, ecosystem, climate, and erosion processes. Access our data using our DAP web application. The Walnut Gulch Experimental Watershed is part of the Long-term Agroecosystem Research Network -- Recent Publications • Comparative analysis of water budgets across the U.S. Long-Term Agroecosystem Research network • Ecosystem carbon and water cycling from a sky island montane forest. • Improving snow water equivalent maps with machine learning of snow survey and LiDAR measurements. • Multiparameter regression modeling for improving quality of measured rainfall and runoff data in densely instrumented watersheds. • Hydrologic model parameterization using dynamic Landsat-based vegetative estimates within a semiarid grassland. • A daily spatially explicit stochastic rainfall generator for a semi-arid climate. • Evaluating the reliability of the U.S. Cooperative Observer Program precipitation observations for extreme events analysis using the LTAR network. • Critical zone water balance over thirteen years in a semiarid savanna. • Long-term evidence for fire as an ecohydrologic threshold reversal mechanism on woodland-encroached sagebrush shrublands. • Vegetation, Hydrologic, and Erosion Responses of Sagebrush Steppe 9 Yr Following Mechanical Tree Removal. • Estimating forage utilization with drone-based photogrammetric point clouds. • Intensification of the North American Monsoon rainfall as observed from a long-term high-density gauge network. • The impacts of porous rock check dams on a semiarid alluvial fan. • Comparative analysis of water budgets across the U.S. Long-Term Agroecosystem Research network • Trans Situ Conservation of Crop Wild Relatives • Intensification of the North American Monsoon rainfall as observed from a long-term high-density gauge network. • Velocities of shallow overland flow on semiarid hillslopes. • The geomorphic legacy of water and erosion control structures in a semiarid rangeland watershed. • The Rangeland Hydrology and Erosion Model: A dynamic aproach for predicting soil loss on rangelands. • Slope-Velocity-Equilibrium and evolution of surface roughness on a stony hillslope • Application of ecological site information to transformative changes on Great Basin sagebrush rangelands. • Terrestrial carbon balance in a drier world: the effects of water availability in southwestern North America. • Impacts of hydraulic redistribution on grass-tree competition versus facilitation in a semiarid savanna. -- Quick Links • SWRC Data Access Project • SWRC Scientific Modeling Tools (Software) • Publication Search • Webcams • Videos • Time-lapse Videos • SWRC/Walnut Gulch Brochure • Software -- The Southwest Watershed Research Center is located in Tucson, AZ and is part of the Pacific West Area . The Research Leader is Philip Heilman. Email: phil.heilman@usda.gov Phone: (520) 647-9202 Fax: 520-670-6493 USDA, ARS, SW WATERSHED RES 2000 EAST ALLEN ROAD Tucson, AZ 85719 Connect with ARS Sign up ARS Home USDA.gov Plain Writing Policies & Links Contact Us FOIA Accessibility Statement Privacy Policy Non-Discrimination Statement Quality of Information USA.gov WhiteHouse.gov...