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Watershed Scale Impacts Of Buffers And Upland Conservation Practices On Agrochemical Delivery To Streams, Thomas G. Franti, Dean E. Eisenhauer, Mary Carla Mccullough, L. M. Stahr, Mike Dosskey, D. D. Snow, Roy F. Spalding, Alan L. Boldt
Watershed Scale Impacts Of Buffers And Upland Conservation Practices On Agrochemical Delivery To Streams, Thomas G. Franti, Dean E. Eisenhauer, Mary Carla Mccullough, L. M. Stahr, Mike Dosskey, D. D. Snow, Roy F. Spalding, Alan L. Boldt
USDA Forest Service / UNL Faculty Publications
Conservation buffers are designed to reduce sediment and agrichemical runoff to surface water. Much is known about plot and field scale effectiveness of buffers; but little is known about their watershed scale impact. Our objective was to estimate the watershed scale impact of grass buffers by comparing sediment and agrichemical losses from two adjacent 141-165 hectare watersheds, one with conservation buffers and one without. Rainfall derived runoff events from 2002-2003 were monitored for water runoff, TSS, phosphorous and atrazine loss. A conservation-watershed included 0.8 km of grass buffers and 0.8 km of riparian forest buffer, ridge-tilled corn, corn-beans-alfalfa rotation, terraces …