TY - JOUR
T1 - Sensitivity evaluation of the flash flood warning system introduced to ungauged small mountainous basins in Korea
AU - Yoo, Chulsang
AU - Lee, Jinwook
AU - Chang, Kwonhee
AU - Yang, Dongmin
N1 - Funding Information:
This work is supported by the Korea Environmental Industry & Technology Institute (KEITI) grant funded by the Ministry of Environment (Grant RE201902084), and by the National Institute for Disaster Prevention (NIDP) grant funded by Ministry of Public Administration and Security (NDMI-Basic-2017-16-01).
Publisher Copyright:
© 2019, Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - 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.
AB - 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.
KW - Flash flood guidance
KW - Flash flood warning system
KW - Sensitivity analysis
UR - http://www.scopus.com/inward/record.url?scp=85065446666&partnerID=8YFLogxK
U2 - 10.1007/s11629-018-4984-4
DO - 10.1007/s11629-018-4984-4
M3 - Article
AN - SCOPUS:85065446666
VL - 16
SP - 971
EP - 990
JO - Journal of Mountain Science
JF - Journal of Mountain Science
SN - 1672-6316
IS - 5
ER -