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KMID : 1024520200290010015
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Journal of the Environmental Sciences
2020 Volume.29 No. 1 p.15 ~ p.23
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Impact of Different Green-Ampt Model Parameters on the Distributed Rainfall-Runoff Model FLO-2D owing to Scale Heterogeneity
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Hwang Ji-Hyeong
Lee Khil-Ha
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Abstract
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The determination of soil characteristics is important in the simulation of rainfall runoff using a distributed FLO-2D model in catchment analysis. Digital maps acquired using remote sensing techniques have been widely used in modern hydrology. However, the determination of a representative parameter with spatial scaling mismatch is difficult. In this investigation, the FLO-2D rainfall-runoff model is utilized in the Yongdam catchment to test sensitivity based on three different methods (mosaic, arithmetic, and predominant) that describe soil surface characteristics in real systems. The results show that the mosaic method is costly, but provides a reasonably realistic description and exhibits superior performance compared to other methods in terms of both the amount and time to peak flow.
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KEYWORD
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Green-Ampt, Scaling effect, FLO-2D, Yongdam catchment infiltration
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