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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : On the use of flood index as a tool in flood risk management
On the use of flood index as a tool in flood risk management
Author : BISWA BHATTACHARYA(1) & ASADUSJJAMAN SUMAN(2)
ABSTRACT
Due to climatological characteristics there are catchments where flood forecasting may have a relatively limited role and
flood event management may have to be trusted upon. For example, in flash flood catchments, which often may be tiny
and un-gauged, flood event management often depends on approximate prediction tools such as flash flood guidance
(FFG). There are catchments fed largely by flood waters coming from upstream catchments, which are un-gauged or due
to data sharing issues in transboundary catchments the flow of information from upstream catchment is limited.
Hydrological and hydraulic modelling of these downstream catchments will never be sufficient to provide any required
forecasting lead time and alternative tools to support flood event management will be required. In FFG, or similar
approaches, the primary motif is to provide guidance by synthesising the historical data. We follow a similar approach to
characterise past flood hydrographs to determine a flood index (FI), which varies in space and time with flood magnitude
and its propagation. By studying the variation of the index the pockets of high flood risk, requiring attention, can be
earmarked beforehand. This approach can be very useful in flood risk management of catchments where information
about hydro-meteorological variables is inadequate for any forecasting system. This paper presents the development of FI
and its application to the Oc-gok catchment in the Republic of Korea.
File Size : 302,843 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 18/08/2015
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