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THE CALIBRATION VALIDATION AND SENSITIVITY ANALYSIS OF GEORGIA DOSAG: AN IN-STREAM DISSOLVED OXYGEN MODEL
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Watershed Management to Meet Water Quality Standards and Emerging TMDL (Total Maximum Daily Load) Proceedings of the Third Conference 5-9 March 2005 (Atlanta, Georgia USA) Publication Date 5 March 2005 701P0105.(doi:10.13031/2013.18088)
Authors: A. M. Cathey, G. Vellidis, M. C. Smith, R. Lowrance, and R. Burke
Keywords: Dissolved oxygen, DoSag, calibration, validation, sensitivity analysis, long-term BOD, TMDL
Eighty four percent of dissolved oxygen (DO) impaired streams in Georgia occur within five
physiographic regions: the Tifton Upland, Vidalia Upland, Okefenokee Basin, Bacon Terraces,
and the Barrier Islands Sequence. Such a high number poses the question; is the average daily
level of DO in these streams naturally less than the water quality standard of 5.0 mg L-1? Streams
in southern Georgia display several characteristics causing low levels of DO. Typically, the
streams have low gradient channels, experience high temperatures and low to zero flow in the
summer, and initial evidence shows that sediment oxygen demand (SOD) may be high.