| Evaluating conservation program success with Landsat and SWAT. | |
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MedLine Citation:
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PMID: 20213232 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In the United States, many state and federally funded conservation programs are required to quantify the water quality benefits resulting from their efforts. The objective of this research was to evaluate the impact of conservation practices subsidized by the Oklahoma Conservation Commission on phosphorus and sediment loads to Lake Wister. Conservation practices designed to increase vegetative cover in grazed pastures were evaluated using Landsat imagery and the Soil and Water Assessment Tool (SWAT). Several vegetative indices were derived from Landsat imagery captured before and after the implementation of conservation practices. Collectively, these indicators provided an estimate of the change in vegetative soil cover attributable to conservation practices in treated fields. Field characteristics, management, and changes in vegetative cover were used in the SWAT model to simulate sediment and phosphorus losses before and after practice implementation. Overall, these conservation practices yielded a 1.9% improvement in vegetative cover and a predicted sediment load reduction of 3.5%. Changes in phosphorus load ranged from a 1.0% improvement to a 3.5% increase, depending upon initial vegetative conditions. The use of fertilizers containing phosphorus as a conservation practice in low-productivity pastures was predicted by SWAT to increase net phosphorus losses despite any improvement in vegetative cover. This combination of vegetative cover analysis and hydrologic simulation was a useful tool for evaluating the effects of conservation practices at the basin scale and may provide guidance for the selection of conservation measures subsidized in future conservation programs. |
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Authors:
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Michael J White; Daniel E Storm; Philip Busteed; Scott Stoodley; Shannon J Phillips |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2010-03-07 |
Journal Detail:
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Title: Environmental management Volume: 45 ISSN: 1432-1009 ISO Abbreviation: Environ Manage Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-05-17 Completed Date: 2010-08-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703893 Medline TA: Environ Manage Country: United States |
Other Details:
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Languages: eng Pagination: 1164-74 Citation Subset: IM |
Affiliation:
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USDA-ARS Grassland, Soil, and Water Research Laboratory, Temple, TX 76502-6712, USA. mike.white@ars.usda.gov |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Agriculture
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economics,
standards Conservation of Natural Resources / economics, legislation & jurisprudence, methods* Financing, Government Fresh Water / analysis* Geologic Sediments / analysis Models, Theoretical Oklahoma Phosphorus / analysis Program Evaluation* Water Pollution / analysis, prevention & control* Water Supply / economics, legislation & jurisprudence, standards* |
| Chemical | |
Reg. No./Substance:
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7723-14-0/Phosphorus |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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