FIELD OBSERVATION OF SEASONAL VARIATION OF RIVER MOUTH BAR OF SMALL RIVERS FLOWING INTO PACIFIC OCEAN

Abstract

 Field observations on the seasonal variation of the river mouth bars were carried out at the Choja River mouth located on the Emi-Wada coast and the Yonaga and Tenjin Rivers on the Kamogawa coast. The change in the river mouth bar was measured using aerial photographs and GPS. A method estimating longshore sand transport at a river mouth was proposed using the change in river mouth bar and the foreshore slope.