AN ATTEMPT FOR INTEGRATED STOCHASTIC EVALUATION OF VEGETATION OVERGROWTH TENDENCY AND FLOOD PROTECTION SAFETY IN RIVER CHANNELS

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  • 河川水系の複数河道における樹林化傾向・治水安全性の統合的確率評価の試み
  • カセン スイケイ ノ フクスウ カドウ ニ オケル ジュリンカ ケイコウ ・ チスイ アンゼンセイ ノ トウゴウ テキカクリツ ヒョウカ ノ ココロミ

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Abstract

Vegetation overgrowth on sand bars and floodplains has been a serious engineering problem for both flood protection and ecological conservation in many river basins in Japan. This paper tries to evaluate both vegetation overgrowth tendency and flood protection safety in an integrated manner for several vegetated channels in Kako river basin. The evaluation employs a stochastic process model, which has been developed for statistically evaluating flow and vegetation status on a floodplain through the Monte Carlo simulation. The result shows that the river channels with high flood protection priority are extracted from the several channel sections with the corresponding vegetation status.

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