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http://dx.doi.org/10.3741/JKWRA.2015.48.11.925

A Study on the Effectiveness of Radar Rainfall by Comparing with Flood Inundation Record Map Using KIMSTORM (Grid-based KIneMatic Wave STOrm Runoff Model)  

Ahn, So Ra (Dept. of Civil and Environmental System Engineering, Konkuk University)
Jung, Chung Gil (Dept. of Civil and Environmental System Engineering, Konkuk University)
Kim, Seong Joon (Dept. of Civil and Environmental System Engineering, Konkuk University)
Publication Information
Journal of Korea Water Resources Association / v.48, no.11, 2015 , pp. 925-936 More about this Journal
Abstract
The purpose of this study is to explore the effectiveness of dual-polarization radar rainfall by comapring with the flood inundation record map through KIMSTORM(Grid-based KIneMatic wave STOrm Runoff Model). For Namgang dam ($2,293km^2$) watershed, the Bisl dual-polarization radar data for 3 typhoons (Khanun, Bolaven, Sanba) and 1 heavy rain event in 2012 were prepared. For both 28 ground rainfall data and radar rainfall data, the model was calibrated using observed discharge data at 5 stations with $R^2$, Nash and Sutcliffe Model Efficiency (ME) and Volume Conservation Index (VCI). The calibration results of $R^2$, ME and VCI were 0.85, 0.78 and 1.09 for ground rainfall and 0.85, 0.79, and 1.04 for radar rainfall respectively. The flood inundation record areas (SY and MD/SG district) by typhoon Sanba were compared with the distributed modeling results. The spatial distribution by radar rainfall produced more surface runoff from the watershed and simulated higher stream discharge than the ground rainfall condition in both SY and MD/SG district. In case of MD/SG district, the stream water level by radar rainfall near the flood inundation area showed 0.72 m higher than the water level by ground rainfall.
Keywords
radar rainfall; KIMSTORM; distributed rainfall-runoff model; storm runoff modeling; flood record map;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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