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http://dx.doi.org/10.3741/JKWRA.2020.53.3.225

Development of flood forecasting system on city·mountains·small river area in Korea and assessment of forecast accuracy  

Hwang, Seokhwan (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Yoon, Jungsoo (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Kang, Narae (Flash Flood Research Center, Korea Institute of Civil Engineering and Building Technology)
Lee, Dong-Ryul (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korea Water Resources Association / v.53, no.3, 2020 , pp. 225-236 More about this Journal
Abstract
It is not easy to provide sufficient lead time for flood forecast in urban and small mountain basins using on-ground rain gauges, because the time concentration in those basins is too short. In urban and small mountain basins with a short lag-time between precipitation and following flood events, it is more important to secure forecast lead times by predicting rainfall amounts. The Han River Flood Control Office (HRFCO) in South Korea produces short-term rainfall forecasts using the Mcgill Algorithm for Precipitation-nowcast by Lagrangian Extrapolation (MAPLE) algorithm that converts radar reflectance of rainfall events. The Flash Flood Research Center (FFRC) in the Korea Institute of Civil Engineering and Building Technology (KICT) installed a flash flood forecasting system using the short-term rainfall forecast data produced by the HRFCO and has provided flash flood information in a local lvel with 1-hour lead time since 2019. In this study, we addressed the flash flood forecasting system based on the radar rainfall and the assessed the accuracy of the forecasting system for the recorded flood events occurred in 2019. A total of 31 flood disaster cases were used to evaluate the accuracy and the forecast accuracy was 90.3% based on the probability of detection.
Keywords
Urban basins and small mountain basins; Flash flood forecasting system; Flash flood information with local size and 1 hour ago; Forecast accuracy;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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