Modeling Soil Erosion and Sediment Yield in Rangeland Environments
Southwest Watershed Research
Project Number: 5342-12660-005-08
Specific Cooperative Agreement
Start Date: Jul 01, 2013
End Date: Sep 30, 2014
The objectives of this cooperative research project are to develop new methods and technologies to improve the measurement and modeling of erosion and sediment yield at a range of scales, with an emphasis on the development of the Rangeland
Hydrology and Erosion Model (RHEM) and application to the Conservation Effects
Assessment Project (CEAP).
Develop methods and techniques for quantifying natural and anthropogenic induced
ephemeral-channel runoff and subsequent recharge in cooperation with U.S.
Geological Survey Tucson Science Center under current and projected climate
Develop methods and techniques to quantify and predict water budgets of riparian
ecosystems under current and projected climate scenarios through direct
measurements of evaporation and plant transpiration and predict water savings by
removal of invasive mesquite vegetation.
Develop methods and techniques to explicitly quantify the spatial and temporal
distribution of vegetation, land use, and infiltration reduction using remotely
sensed methods to improve prediction of basin scale semi-arid water budget
The RHEM model will be tested, and parameter estimation procedures will be
developed. A web-based interface will be constructed. The model will be linked to
NRCS databases included the National Resource Inventory (NRI), and methods will be
developed to assess the impact of conservation practices on natural resources, and
soil erosion in particular. Relative accuracy of the models will be compared and
documented, and models will be evaluated in terms of the type of information that
each model is able to provide.