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The Evaluation of TOPLATS Land Surface Model Application for Forecasting Flash Flood in mountainous areas
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 Title & Authors
The Evaluation of TOPLATS Land Surface Model Application for Forecasting Flash Flood in mountainous areas
Lee, Byong Jua; Choi, Su Mina; Yoon, Seong Sima; Choi, Young Jean;
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The objective of this study is the generation of the gridded flash flood index using the gridded hydrologic components of TOPLATS land surface model and statistic flash flood index model. The accuracy of this method is also examined in this study. The study area is the national capital region of Korea, and 38 flash flood damages had occurred from 2009 to 2012. The spatio-temporal resolutions of land surface model are 1 h and 1 km, respectively. The gridded meteorological data are generated using the inverse distance weight method with automatic weather stations (AWSs) of Korea Meteorological Administration (KMA). The hydrological components (e.g., surface runoff, soil water contents, and water table depth) of cells corresponding to the positions of 38 flood damages reasonably respond to the cell based hourly rainfalls. Under the total rainfall condition, the gridded flash flood index shows 71% to 87% from 4 h to 6 h in the lead time based on the rescue request time and 42% to 52% of accuracy at 0 h which means that the time period of the lead time is in a limited rescue request time. From these results, it is known that the gridded flash flood index using the cell based hydrological components from land surface model and the statistic flash flood index model have a capability to predict flash flood in the mountainous area.
TOPLATS land surface model;statistic flash flood index model;gridded flash flood index;
 Cited by
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