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http://dx.doi.org/10.15681/KSWE.2011.27.1.2

Optimal Volume Estimation for Non-point Source Control Retention Considering Spatio-Temporal Variation of Land Surface  

Choi, Daegyu (Department of Environmental System Engineering, Pukyong National University)
Kim, Jin Kwan (Department of Civil and Environmental Engineering, Korea University)
Lee, Jae Kwan (Nakdong River Water Environmental Research Center, National Institute of Environmental Research)
Kim, Sangdan (Department of Environmental System Engineering, Pukyong National University)
Publication Information
Journal of Korean Society on Water Environment / v.27, no.1, 2011 , pp. 9-18 More about this Journal
Abstract
In this study the optimal volume for non-point source control retention is estimated considering spatio-temporal variation of land surface. The 3-parameter mixed exponential probability density function is used to represent the statistical properties of rainfall events, and NRCS-CN method is applied as rainfall-runoff transformation. The catchment drainage area is divided into individual $30m{\times}30m$ cells, and runoff curve number is estimated at each cell. Using the derived probability density function theory, the stormwater probability density function at each cell is derived from the rainfall probability density function and NRCS-CN rainfall-runoff transformation. Considering the antecedent soil moisture condition at each cell and the spatial variation of CN value at the whole catchment drainage area, the ensemble stormwater capture curve is established to estimate the optimal volume for an non-point source control retention. The comparison between spatio-temporally varied land surface and constant land surface is presented as a case study for a urban drainage area.
Keywords
Non-point source management; NRCS-CN; Stormwater capture curve; Urban hydrology;
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Times Cited By KSCI : 2  (Citation Analysis)
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