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http://dx.doi.org/10.3741/JKWRA.2008.41.12.1231

Estimation of Runoff Curve Number for Chungju Dam Watershed Using SWAT  

Kim, Nam-Won (Hydrology Research Div., Korea Institute of Construction Technology)
Lee, Jin-Won (Hydrology Research Div., Korea Institute of Construction Technology)
Lee, Jeong-Woo (Hydrology Research Div., Korea Institute of Construction Technology)
Lee, Jeong-Eun (Hydrology Research Div., Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.41, no.12, 2008 , pp. 1231-1244 More about this Journal
Abstract
The objective of this study is to present a methodology for estimating runoff curve number(CN) using SWAT model which is capable of reflecting watershed heterogeneity such as climate condition, land use, soil type. The proposed CN estimation method is based on the asymptotic CN method and particularly, it uses surface flow data simulated by SWAT. This method has advantages to estimate spatial CN values according to subbasin division and to reflect watershed characteristics because the calibration process has been made by matching the measured and simulated streamflows. Furthermore, the method is not sensitive to rainfall-runoff data since CN estimation is on a daily basis. The SWAT based CN estimation method is applied to Chungju dam watershed. The regression equation of the estimated CN that exponentially decays with the increase of rainfall is presented.
Keywords
runoff curve number; SWAT; asymptotic CN method;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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