CHED 1153 |
| Total Maximum Daily Load (TMDL) is a term used to describe the amount of pollution a stream can receive and still meet water quality standards. Computer models are often used to evaluate if TMDLs are being met. Agricultural Non-Point Source (AGNPS) is a data intensive watershed model that routes sediment and nutrients through a watershed by utilizing land uses and topography. Since Phosphorus (P) is considered an essential algal nutrient and thus a major contributor to water resource eutrophication, P is an essential nutrient input parameter of AGNPS. Based on the results generated from AGNPS, Best Management Practices (BMPs) are implemented in the critical areas to alleviate P loading to watershed outlets. There is little total P data available for the representative soils of this region. Consequently, total P was determined for select mollisol soils of South Dakota and Western Minnesota. Total P was determined using mixed sulfuric and hydrofluoric acid digestion and ascorbic acid colorimetric procedures. Total P values relative to the current AGNPS watershed model and their correlation to the standard Olsen-P index for agronomic P are discussed. |
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Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |