越流侵食・浸透のメカニズムを把握するための小型堤防による越流侵食実験

抄録

There is not enough of the necessary scientific and technical data and method to enhance the measures against seepage of river embankment due to high water-level and against its erosion due to overtopping of river water. This experimental study was done to understand mechanisms of river embankment deformation by seepage flow and erosion due to overtopping water by using small-scaled physical model (height of embankment is one meter). Experiments were carried out under the several hydraulic and soil conditions such as overflow depth, degree of soil compaction, moisture content in the embankment, etc.

From those experiments, it was found that wet condition in the embankment significantly effects on the eroded locations, resulting shapes and sediment volume yielded that is strongly depend on the degree of soil compaction. It was, therefore, shown that operation and management of embankment, especially soil property, is very important to keep embankment safe from seepage and erosion due to overtopping.