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Use of a watershed model to characterize the fate and transport of fluometuron, a soil-applied cotton herbicide, in surface water

January 1, 2007

The Soil and Water Assessment Tool (SWAT) was used to characterize the fate and transport of fluometuron (a herbicide used on cotton) in the Bogue Phalia Basin in northwestern Mississippi, USA. SWAT is a basin-scale watershed model, able to simulate hydrological, chemical, and sediment transport processes. After adjustments to a few parameters (specifically the SURLAG variable, the runoff curve number, Manning's N for overland flow, soil available water capacity, and the base-flow alpha factor) the SWAT model fit the observed streamflow well (the Coefficient of Efficiency and R2 were greater than 60). The results from comparing observed fluometuron concentrations with simulated concentrations were reasonable. The simulated concentrations (which were daily averages) followed the pattern of observed concentrations (instantaneous values) closely, but could be off in magnitude at times. Further calibration might have improved the fit, but given the uncertainties in the input data, it was not clear that any improvement would be due to a better understanding of the input variables. ?? 2007 Taylor & Francis.

Citation Information

Publication Year 2007
Title Use of a watershed model to characterize the fate and transport of fluometuron, a soil-applied cotton herbicide, in surface water
DOI 10.1080/03067310701627819
Authors R.H. Coupe
Publication Type Article
Publication Subtype Journal Article
Series Title International Journal of Environmental Analytical Chemistry
Series Number
Index ID 70031528
Record Source USGS Publications Warehouse
USGS Organization