わが国における地質別の崩壊特性と貯水池堆砂 (その2) : 崩壊土砂の貯水池堆砂に対する寄与

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The Part 1 paper shows that the volumes of slope failure products have a good positive correlation with those of sediment-loads in reservoirs in a relatively long term such as a decade. The present study examines the relationship between both parameters in a relatively short term such as a flood duration in order to clarify the contribution of slope failure volumes to reservoir sedimentation. A simulation method is applied to this study. The main results obtained are as follows. (1) A physically based river-bed fluctuation simulation method was applied to the A dam drainage basin, which is characterized with high rainfall in Japan, in order to estimate volumes of sediment-loads in reservoirs during actual floods. Three flood cases of the four showed that such calculated values were in good accordance with the comparable actual ones. Therefore, this result proved that the simulation method could properly reappear the reservoir sedimentation. (2) By using the simulation method proposed here as a methodology the volumes of sediment-loads in reservoirs of two cases, one case considering the volume of slope failure products and the other not, were compared with each other. This was done to examine a contribution ratio of slope failure volumes to those of sediment-loads in reservoirs. The result of this case study applied to the A dam drainage basin showed that the average contribution ratio was about 5-10% during a flood.
一般社団法人日本応用地質学会の論文
1997-02-10

わが国における地質別の崩壊特性と貯水池堆砂 (その2) : 崩壊土砂の貯水池堆砂に対する寄与

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