EXAMINATION OF ASSUMED INUNDAITON DUE TO LARGE SCALE FLOODS IN FUTURE FORECASTS

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  • 将来予測における大規模洪水を対象とした想定浸水の検討

Abstract

<p> Recently, large scale inundation has occurred frequently. In addition, in the study of flood in consideration of climate change, the occurrence of extremely large floods has also been calculated. If large flood and large scale urban inundation occur, the flood water flows to the lower part of the urban area. Then amount of flood water may flow into the underground spaces, human damages and economic damages may be extremely large. In this study, inundation analysis in Shonai River basin will be performed using the future forecast flood discharge obtained by Tachikawa et al., and its inundation characteristics will be clarified. As a result, there was time delay on the temporal change of flood in the case of inundation consideration in upstream region, but the peak discharge did not change. In addition, on the inundation of the downstream region, it was shown that the underground inundation increases, although there is no big difference in the state of inundation on the land in the analysis conditions considering levee breach.</p>

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