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Land-Based Measures of BMP Performance

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008943.(doi:10.13031/2013.29767)
Authors:   Gene Yagow, Brian Benham, Erin James Ling
Keywords:   Metrics, BMPs, performance.

Typically, the effectiveness of agricultural and forestry BMPs is evaluated based on in-stream measurements of nutrients and sediment. However, as can be seen from the wide range of reduction efficiencies attributed to any BMP from published research, a large number of climatic, fate, and transport variables often obscure cause and effect relationships and the exact mechanisms responsible for load reduction. In-stream pollutant reductions from BMP implementation are also typically not immediate, but gradually accrue over time as vegetative BMPs mature, or while BMPs reduce nutrient build-up in the soil or bacteria attached to channel sediments. Because of these uncontrolled variables and time lags between BMP implementation and pollutant reduction, BMP performance efficiencies are difficult to evaluate.

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