Sediment database, Walnut Gulch Experimental Watershed, Arizona, United States

Improving the scientific understanding of erosion and sedimentation processes within semiarid rangeland watersheds has been a primary objective of data collection on the Walnut Gulch Experimental Watershed since its establishment in 1953. Sampling instruments and techniques are described, including the traversing slot sediment sampler, pump samplers on both V notch weirs and H flumes, and stock tank sedimentation surveys. Sediment collected at the outlets of seven small watersheds and long-term data collected through stock tank sedimentation surveys at eight sites dating from the 1950s are described. Data are available at http://www.tucson.ars.ag.gov/dap/.