On the Effect of Sand Storm in Controlling the Mouth of the Kiku River

Abstract

As the mouth of the Kiku River flowing into the Sea of Ensyū always moves, being blockaded in some cases, due to the sand-drift in the sea and on the coast by monsoons in winter, the raised water level in the river mouth gives unfavorable effects to the upstream side of the river. Therefore, the control project to maintain the river mouth and prevent it from blockading is becoming a pending problem of the river. It is very difficult to solve this kind of problem satisfactorily, and it is necessary to start fundamental researches in order to obtain a clue to settle this problem. Thus, in this paper, we tackled the effect of sand storm on the coast by wind, that is, estimating the sand quantity moved by sand storm in a year based on the data of wind-velocity, -direction and rainfall, we discussed the effect of sand storm on the movement and blockade of the river mouth from the point of view of civil engineering.