急流河川における高水敷上の自然段差を利用した堤防侵食対策工法の検討

抄録

The Jyoganji river is one of the most rapid stony rivers in Japan. The energy of flood stream is so large that bank erosion is much greater than that of gentle flow rivers. It is difficult to imagine flow attack points where bank erosion occurs. Therefore, after the flood, we have taken measures by constructing new revetments or underpinning works. However, it takes enormous expense and time to strengthen riverbanks or embankments.

In this paper, we performed field experiments to fmd a simple and efficient bank protection method for the steep river in a meandering channel dug on a bar of the Jyoganji river. We found a useful technique against the bank erosion by putting stones in order along natural ground steps on the flood plain. The field design is presented for applying to the Jyoganji river.