首页|Sensitivity evaluation of the flash flood warning system introduced to ungauged small mountainous basins in Korea

Sensitivity evaluation of the flash flood warning system introduced to ungauged small mountainous basins in Korea

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This study evaluates the uncertainty involved in the determination of the flash flood guidance (FFG) of the flash flood warning system (FFWS) for a small mountainous region (FFWS_MR) in Korea.The sensitivity is evaluated both at each step to determine the FFG and for all steps together.The results show that the relative difference of the FFG is about 50％ of the current system,most of which involves the channel width.Especially,the use of some specific empirical equations to estimate the major parameters results in a considerable amount of the relative difference of the FFG.In addition,though only four basins were field-surveyed,it is found that the indirect estimation of the major parameters always introduces some amount of additional uncertainty.In conclusion,accurate estimation of the major parameters must be the most important procedure to derive an accurate FFG,among which the channel cross-section at the exit of the basin lies at the center.

Flash flood warning systemFlash flood guidanceSensitivity analysis

YOO Chulsang、LEE Jinwook、CHANG Kwonhee、YANG Dongmin

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School of Civil, Environmental and Architectural Engineering, College of Engineering, Korea University, Seoul 02841,South Korea

NOAA SNC Co., Ltd., Seoul 08589, South Korea

This work is supported by the Korea Environmental Industry & Technology Institute (KEITI) grant funded by the Ministry of Enviroand by the National Institute for Disaster Prevention (NIDP) grant funded by Ministry of Public Administration and Security

Grant RE201902084NDMI-Basic-2017-16-01

2019

山地科学学报(英文版)
中国科学院水利部成都山地灾害与环境研究所

山地科学学报(英文版)

CSTPCDCSCDSCI
影响因子：0.228
ISSN：1672-6316
年,卷(期)：2019.16(5)
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