Development and Validation of Prevention Technique for Blown Sand by Natural Vegetations

Blown sand is a serious problem in the district facing the Japan Sea where seasonal wind is very strong in winter. In order to prevent the blown sand, the construction technique using natural vegetations had been developed. The growth of the natural vegetations is encouraged by the improvement of sand ingredients in this method. The effects of the method were investigated by the field survey and observation at the seashore in Kashiwazaki, Niigata Prefecture. As a result, the increase in the ground level by the sedimentary sand, which was caught by the vegetations, was observed in contrast with the natural beach. It was confirmed that this method is effective on the growth of the natural vegetations and the prevention of the blown sand.