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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

International Journal of Environmental Analytical Chemistry

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DOI: 10.1080/03067310701627819

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Abstract

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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Use of a watershed model to characterize the fate and transport of fluometuron, a soil-applied cotton herbicide, in surface water
Series title:
International Journal of Environmental Analytical Chemistry
DOI:
10.1080/03067310701627819
Volume
87
Issue:
13-14
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
International Journal of Environmental Analytical Chemistry
First page:
883
Last page:
896