Click on “Download PDF” for the PDF version or on the title for the HTML version.
If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.
Use of SWAT to Quantify TMDL Load Allocations for a Large Watershed in Western Ohio (USA)
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 232-232 in Total Maximum Daily Load (TMDL) Environmental Regulations–II Proceedings of the 8-12 November 2003 Conference (Albuquerque, New Mexico USA), Publication Date 8 November 2003. .(doi:10.13031/2013.15564)
Authors: D.A. White and K.W. King
A 4500 sq.km watershed in western Ohio (USA) was modelled using SWAT (v 2000) to
understand the variation in stressors that induce super-enrichment of waterbodies from nutrients.
The watershed is composed primarily of a large number of animal feeding operations
(incorporates a county with the second highest number of operations in Ohio), and intense rowcrop
agriculture of corn/soybean with mixtures of perennial grasses and winter wheat. The
watershed is listed in Section 303(d) and TMDL load allocations were made to assign
responsibility of target restoration to various sectors of stakeholders. The SWAT model was
calibrated to three long-term USGS flow gauges situated in the watershed and showed very
reasonable matching to observed data. The project demonstrates the following aspects of TMDLs
and water quality modeling: