A water quality assessment of the import of turfgrass sod grown with composted dairy manure into a suburban watershed

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Title: A water quality assessment of the import of turfgrass sod grown with composted dairy manure into a suburban watershed
Author: Richards, Chad Edward
Abstract: Concentrated animal feeding operations (CAFOs ) have caused water quality concerns in many rural watersheds , sometimes forcing the State of Texas to conduct Total Maximum Daily Load (TMDL ) assessments of stream nutrients such as nitrogen (N ) and phosphorus (P ) . One suggested Best Management Practice (BMP ) is the export of phosphorus (P ) through turfgrass sod produced with composted dairy manure from an impaired rural watershed to an urban watershed . The manure -grown sod releases P slowly and would not require additional P fertilizer for up to 20 years in the receiving watershed . This would eliminate P application to the sod and improve the water quality of urban streams . The Soil and Water Assessment Tool (SWAT ) was used to model a typical suburban watershed that would receive the transplanted sod . The objective of the modeling was to determine the water quality changes due to the import of sod transplanted from turf fields and grown with composted dairy manure . The SWAT model was calibrated to simulate historical flow and sediment and nutrient loading to Mary's Creek . The total P stream loading to Mary's Creek was lower when manure -grown sod was imported instead of commercial sod grown with inorganic fertilizers . Yet , flow , sediment yield , and total N yield increased equally for both cases at the watershed outlet . The SWAT simulations indicate that a turfgrass BMP can be used effectively to import manure P into an urban watershed and reduce in -stream P levels when compared to sod grown with inorganic fertilizers .
URI: http : / /hdl .handle .net /1969 .1 /1427
Date: 2005-02-17

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A water quality assessment of the import of turfgrass sod grown with composted dairy manure into a suburban watershed. Available electronically from http : / /hdl .handle .net /1969 .1 /1427 .

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