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	Provedor de dados AgEcon (1) Autor Arnold, Jeffrey G. (1) Gassman, Philip W. (1) Gu, Roy (1) Jha, Manoj K. (1) Secchi, Silvia (1) Palavra-chave AVSWAT (1) Modeling of sediment yield (1) Resource /Energy Economics and Policy (1) SWAT (1) Soil and Water Assessment Tool (1) Threshold subwatershed size (1) Watershed subdivision (1) Mais... Tipo do documento Working or Discussion Paper (1) Ano 2002 (1) País United States (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última IMPACT OF WATERSHED SUBDIVISION LEVEL ON FLOWS, SEDIMENT LOADS, AND NUTRIENT LOSSES PREDICTED BY SWAT AgEcon Jha, Manoj K.; Gassman, Philip W.; Secchi, Silvia; Gu, Roy; Arnold, Jeffrey G.. The size, scale, and number of subwatersheds can affect a watershed modeling process and subsequent results. The objective of this study was to determine the appropriate level of subwatershed division for simulating sediment yield. The Soil and Water Assessment Tool (SWAT) model with a geographic information system interface (AVSWAT) was applied to four Iowa watersheds that varied greatly in drainage area. Annual output was analyzed from each simulation, which was executed for 30 years using climatic data representing the 1970 to 2000 period. The optimal threshold subwatershed size of the total drainage area to adequately predict sediment yield was found to be around 3 percent. Decreasing the size of subwatersheds beyond this level does not significantly... Tipo: Working or Discussion Paper Palavras-chave: AVSWAT; Modeling of sediment yield; SWAT; Soil and Water Assessment Tool; Threshold subwatershed size; Watershed subdivision; Resource /Energy Economics and Policy. Ano: 2002 URL: http://purl.umn.edu/18487 Registros recuperados: 1 Primeira ... 1 ... Última

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