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http://dx.doi.org/10.3741/JKWRA.2009.42.2.161

Assessment of Probability Flood according to the Flow Regulation by Multi-purpose Dams in Han-River Basin  

Kim, Nam-Won (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Construction Technology)
Lee, Jeong-Eun (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.42, no.2, 2009 , pp. 161-168 More about this Journal
Abstract
The purpose of this study is to evaluate the variation of probability flood according to the flow regulation by multi-purpose dams (Soyang and Chungju) in the Han-river basin, Korea. SWAT-K (Soil and Water Assessment Tool-Korea) was used in order to generate regulated and unregulated daily streamflows upstream of Paldang dam. Simulated flow regulated by the Soyang and Chungju dams was calibrated by comparison with the observed inflow data at Paldang reservoir. Generally the ratio of flood flows to daily streamflows is known to decrease with drainage area in a watershed. Regulated and unregulated flood flows were obtained from the relationship between flood flows and daily streamflows. Extreme Type-I distribution was applied for flood frequency analysis and L-moment method was used for parameter estimation. This is a novel approach capable of understanding the variation in flood frequency with dam operation for the relatively large watershed scale, and this will helps improve the applicability of daily stream flow data for use in flood control as well as in water utilization.
Keywords
SWAT-K; Regulated and unregulated streamflows; Flood frequency analysis; L-moment method;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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