HR: 0800h
AN: H21A-0191    [Abstracts]
TI: Modeling Surface Runoff in the Mustang Creek Basin, California, Using the Soil and Water Assessment Tool (SWAT)
AU: * Saleh, D K
EM: dsaleh@usgs.gov
AF: US Geological Survey, Placer Hall 6000 J Street, Sacramento, CA 95819-6129, United States
AU: Kratzer, C R
EM: ckratzer@usgs.gov
AF: US Geological Survey, Placer Hall 6000 J Street, Sacramento, CA 95819-6129, United States
AB: A study was made of the Mustang Creek Basin, a small agricultural basin within the Merced River Basin of the San Joaquin Valley, California, using the 2005 version of the Soil and Water Assessment Tool (SWAT). This research is part of a national study being conducted by the National Water-Quality Assessment program of the U.S. Geological Survey on the processes affecting agricultural chemical movement through hydrologic systems. The SWAT model was used to simulate streamflow in the Mustang Creek Basin using a set of model inputs derived and modified from various data sources. These data sources include soils, land use, precipitation, and elevation data. The model was calibrated using daily-flow data for 29 days in February 2004, and validated using daily-flow data for 58 days in January and February 2005. Measured streamflow from a U.S. Geological Survey gaging station on Mustang Creek was used for calibration and validation. Results of the simulated monthly streamflow had a Nash Sutcliffe efficiency (NSE) value during the calibration period of 0.72, indicating a reasonable fit (the best fit will have a NSE of 1). However, the model was unsuccessful in simulating streamflow during the validation period, with a NSE value of 0.33. This lack of a successful simulation is probably due to the limited quantity and quality of measured streamflow data available for model validation. This application of the SWAT model did not simulate daily discharge on Mustang Creek well; however, additional daily-flow data for a longer period of record may enhance the capability of adequately simulating streamflow in the watershed.
DE: 1847 Modeling
DE: 1860 Streamflow
DE: 1865 Soils (0486)
DE: 1876 Water budgets
SC: Hydrology [H]
MN: 2007 Fall Meeting