Track: Agriculture
Spatial Prediction of Irrigation Efficiency with the UnsatchemGeo Model
Peter VaughanDonald Suarez , Dennis Corwin, James Rhoades
Effective water management in agriculture is important for both efficiency in production and control of pollutants in drainage water. But informed water management requires knowledge of water flow in the subsurface after irrigation as well as coupled processes, notably root water uptake and multicomponent solute transport. The UnsatchemGeo numerical model of such processes is tightly coupled to ArcInfo allowing deterministic spatial predictions of soil water content, surface water flux, drainage from the root zone, soil salinization, and transport of solutes. An application of UnsatchemGeo, to be discussed, is estimation of spatial variation of irrigation efficiency. UnsatchemGeo is available from the U.S. Salinity Laboratory.
Peter Vaughan
U.S. Salinity Laboratory, USDA-ARS
450 W. Big Springs Road
Riverside, CA 92507
USA
Telephone: (909) 369-4875
Fax: (909) 342-4962
E-mail: pvaughan@ussl.ars.usda.gov