DEVELOPMENT OF FLOOD HAZARD INDEX BY USING A NON-EXCEEDANCE PROBABILITY OF ANNUAL MAXIMUM RIVER FLOW

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  • 年最大流量の非超過確率を用いた洪水危険度指標の開発の試み
  • ネン サイダイ リュウリョウ ノ ヒチョウカ カクリツ オ モチイタ コウズイ キケンド シヒョウ ノ カイハツ ノ ココロミ

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There is a basin rainfall index in one of the flood hazard index that has been used in Japan. However, basin rainfall index are having some problems. We propose the use of a non-exceedance probability of annual maximum river flow as a new flood hazard index. For this purpose,the Shinano river basin, large basin, is chosen as the study basin, and grid based distributed hydrological model that include high resolution river network, is constructed in the basin. We simulate a new flood hazard index at any grid (approximately 250m x 250m). It’s shown that a new danger risk index is clearly indicate potential flood disaster areas.

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