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

Research : USDA ARSAn official website of the United States government Here’s how you know Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( Lock A locked padlock ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. 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 UsPhoto Carousel Links Mission: To develop knowledge and technology for sound management of water, plants and soil in semiarid regions The Walnut Gulch Experimental Watershed is part of the Long-term Agroecosystem Research Network 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. Our technology transfer tools make a difference Search through our publications listRecent Publications • Rangeland Brush Estimation Tool (RaBET): An Operational Remote Sensing-Based Application for Quantifying Woody Cover on Western Rangelands • Advances in soil erosion research: processes, measurement, and modeling – A Special Issue in Honor of Dr. Mark Nearing. • Quantitative Representativeness and Constituency of the Long-Term Agroecosystem Research Network and Analysis of Complementarity with Existing Ecological Networks. • Gridded 20-year climate parameterization of Africa and South America for a stochastic weather generator (CLIGEN) • Curating 62 Years of Walnut Gulch Experimental Watershed Data: Improving the Quality of Long-Term Rainfall and Runoff Datasets • Assessing runoff and erosion on woodland-encroached sagebrush steppe using the Rangeland Hydrology and Erosion Model • Streamflow Response to Wildfire Differs With Season and Elevation in Adjacent Headwaters of the Lower Colorado River Basin • Five Decades of Observed Daily Precipitation Reveal Longer and More Variable Drought Events Across Much of the Western United States • The USDA‐ARS Experimental Watershed Network: Evolution, Lessons Learned, Societal Benefits, and Moving Forward • Climate benchmarks and input parameters representing locations in 68 countries for a stochastic weather generator, CLIGEN • Montane forest productivity across a semiarid climatic gradient • The Ecology, History, Ecohydrology, and Management of Pinyon and Juniper Woodlands in the Great Basin and Northern Colorado Plateau of the Western United States • 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. Quick Links • SWRC Data Access Project (DAP) • SWRC Scientific Tools (Software) • SWRC Outreach Tools • Publication Search • Videos describing our research • Webcams • Research Insights in Semiarid Ecosystems (RISE) • ARS Water Research Vision 2050 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 upARS Home USDA.gov Plain Writing Policies & Links Civil Rights Statements FOIA Accessibility Statement Privacy Policy Non-Discrimination Statement Quality of Information USA.gov...