Hydrological Assessment of Multifractal Space-Time Rainfall Downscaling Model: Focusing on Application to the Upstream Watershed of Chungju Dam
Hydrological Assessment of Multifractal Space-Time Rainfall Downscaling Model: Focusing on Application to the Upstream Watershed of Chungju Dam
复制标题
多重分形时空降雨降尺度模型水文评估：以忠州大坝上游流域应用为重点
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Tae‐Woong Kim
中科院分区：
文献类型：
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作者：
Hoyong Song;Dongkyun Kim;Byung;S. Hwang;Tae‐Woong Kim
In this study, a space-time rainfall grid field generation model based on multifractal theory was verified using nine flood events in the upstream watershed of Chungju dam in South Korea. For this purpose, KMA radar rainfall data sets were analyzed for the space-time multifractal characteristics. Simulated rainfall fields that represent the multifractal characteristics of observed rainfall field were reproduced using the space-time rainfall grid field generation model with log-Poisson distribution and three-dimension wavelet function. Simulated rainfall fields were applied to the S-RAT model as input data and compared with both observed rainfall fields and low-resolution rainfall field runoff. Error analyses using RMSE, RRMSE, MAE, SS, NPE and PTE indicated that the peak discharge increases about 20.03% and the time to peak decreases about 0.81%. keywords : downscaling, multifractal, S-RAT model, space-time rainfall field ..............................................................................................................................................................................................
