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Titolo:
Sensitivity considerations when modeling hydrologic processes with digitalelevation model
Autore:
Cho, SM; Lee, M;
Indirizzi:
Honam Univ, Dept Landscape Architecture, Kwnagsan Gu, Kwangju, South KoreaHonam Univ Kwangju South Korea cture, Kwnagsan Gu, Kwangju, South Korea Chonbuk Natl Univ, Dept Landscape Architecture, Chonju 506090, South KoreaChonbuk Natl Univ Chonju South Korea 506090 , Chonju 506090, South Korea
Titolo Testata:
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
fascicolo: 4, volume: 37, anno: 2001,
pagine: 931 - 934
SICI:
1093-474X(200108)37:4<931:SCWMHP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL DATA;
Keywords:
DEM; curve number; sensitivity analysis; runoff volume; water quality; calibration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Cho, SM Honam Univ, Dept Landscape Architecture, Kwnagsan Gu, 59-1 SeobongDong, Kwangju, South Korea Honam Univ 59-1 Seobong Dong Kwangju South Korea ju, South Korea
Citazione:
S.M. Cho e M. Lee, "Sensitivity considerations when modeling hydrologic processes with digitalelevation model", J AM WAT RE, 37(4), 2001, pp. 931-934

Abstract

The purpose of this paper is to investigate the sensitivity of a hydrologic models to the type of DEM used. This was done while modeling basin water quality with 1:24,000 and 1:250,000 U.S. Geological Survey DEMs as input tomodel hydrological processes. The manner in which the model results were sensitive to the choice of raster cell size (scale) is investigated in this study. The Broadhead watershed, located in New Jersey, USA, was chosen as astudy area. Curve numbers were estimated by a trial and error to match simulated and observed total discharge. Monthly runoff for the watershed was used in the calibration process. Higher runoff volumes were simulated by themodel when the 1:24,000 DEM were used as input data, probably due to the finer resolution which simulated increased average slope and hence higher estimated runoff from the watershed. As the simulated slope of the watershed is flatten with the 1:250,000 DEM, the response of stream flow was delayed and simulated less runoff volume.

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Documento generato il 26/11/20 alle ore 11:10:07