z-logo
open-access-imgOpen Access
Evaluation of flash flood severity in K orea using the modified flash flood index ( MFFI )
Author(s) -
Kim BS.,
Kim HS.
Publication year - 2014
Publication title -
journal of flood risk management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.049
H-Index - 36
ISSN - 1753-318X
DOI - 10.1111/jfr3.12057
Subject(s) - flash flood , flood myth , environmental science , hydrology (agriculture) , surface runoff , flash (photography) , magnitude (astronomy) , intensity (physics) , geology , geography , ecology , physics , biology , geotechnical engineering , archaeology , quantum mechanics , astronomy , optics
This paper was initially motivated by a flash flood index ( FFI ) study performed by B haskar et al . and others that explained flash floods using a runoff perspective by extracting a rising curve gradient, the flood magnitude ratio, and flood response time variables from runoff hydrograph. However, the runoff data are not sufficient to estimate a robust flood magnitude ratio in K orea. In addition, the existing model is not able to consider high rainfall intensity, which is an important flash flood characteristic in K orea. Flood magnitude ratio variables, thus, were replaced by rainfall intensity variables. Then, the results were compared with the existing FFI . The spatial distribution of the flood event in the H an R iver basin that occurred in J uly 2006 showed that a modified FFI , which reflects rainfall characteristics, outperformed in representing damaged (flash flood occurrence) areas in the past. Furthermore, the FFI for three different time windows (early, middle, and late periods) for the H an R iver basin during the localised intensive rainfall in J uly 2006 were analysed. Analysis of spatiotemporal distribution showed that sudden intensity was pronounced in the S eoul area during the first 10 days of J uly. During the second 10 days of J uly, a probable high‐intensity flash flood appeared in the G angwon‐do area. Meanwhile, an onsite survey of the G angwon‐do area showed that the actual occurrences of a high‐intensity flash flood were largely in agreement with the predictions made by the model.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.
Having issues? You can contact us here