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Mega Flood Simulation Assuming Successive Extreme Rainfall Events
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  • Journal title : Journal of Wetlands Research
  • Volume 18, Issue 1,  2016, pp.76-83
  • Publisher : Korean Wetlands Society
  • DOI : 10.17663/JWR.2016.18.1.076
 Title & Authors
Mega Flood Simulation Assuming Successive Extreme Rainfall Events
Choi, Changhyun; Han, Daegun; Kim, Jungwook; Jung, Jaewon; Kim, Duckhwan; Kim, Hung Soo;
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 Abstract
In recent, the series of extreme storm events were occurred by those continuous typhoons and the severe flood damages due to the loss of life and the destruction of property were involved. In this study, we call Mega flood for the Extreme flood occurred by these successive storm events and so we can have a hypothetical Mega flood by assuming that a extreme event can be successively occurred with a certain time interval. Inter Event Time Definition (IETD) method was used to determine the time interval between continuous events in order to simulate Mega flood. Therefore, the continuous extreme rainfall events are determined with IETD then Mega flood is simulated by the consecutive events : (1) consecutive occurrence of two historical extreme events, (2) consecutive occurrence of two design events obtained by the frequency analysis based on the historical data. We have shown that Mega floods by continuous extreme rainfall events were increased by 6-17% when we compared to typical flood by a single event. We can expect that flood damage caused by Mega flood leads to much greater than damage driven by a single rainfall event. The second increase in the flood caused by heavy rain is not much compared to the first flood caused by heavy rain. But Continuous heavy rain brings the two times of flood damage. Therefore, flood damage caused by the virtual Mega flood of is judged to be very large. Here we used the hypothetical rainfall events which can occur Mega floods and this could be used for preparing for unexpected flood disaster by simulating Mega floods defined in this study.
 Keywords
Continuous extreme rainfall events;Extreme Flood;Inter Event Time Definition;Mega Flood;
 Language
Korean
 Cited by
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