ESTIMATION OF THE EXTREME RIVER DISCHARGE BY MARKS OF THE TOPOGRAPHY AND GEOLOGY IN VALLEY BOTTOM PLAIN
2016 Volume 22 Pages 25-30
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2016 Volume 22 Pages 25-30
The estimation of possible maximum flood discharge due to the climate change is an important issue in order to consider measures for the disaster prevention and reduction in the river basin.
In the previous paper, the authors looked on river width of stable channel formation and estimated erosion width by large flood.
The purpose of this paper is to verify the validity of the results for the previous paper using the same method in Kurokawa river flowing through the valley plains like Yosasagawa river, for evaluating possibility of the extremal discharge by stepped topography in the valley bottom. And, extremal discharge in the Yosasagawa river was verified by investigating marks of soils remained in flood flow deposits. The possibility was not recognaized in the present study that mud flows accompanying with the snow melting triggered by volcano eruptions was related to the extremal dischrge in the Yosasagawa river basin.
