Nonuniformity of Wind Distribution Over Lake Suwa and Their Effect on Lake Current

Abstract

Wind has an important role in the behavior of lake current. In this study, the field measurement of wind and current distribution was performed simultaneously in Lake Suwa. The results proved the spatially nonuniformity of wind distribution over the lake and counterclockwise horizontal water circulation in the lake when the strong north-west wind was observed. It was examined the effect of spatially non-uniform wind on the lake current using a quasi 3-D numerical model by comparing with the calculation result when the spatially uniform wind all over the lake was assumed. In result, the horizontal water circulation obtained by the field measurement was recognized by considering the measured wind distribution. This showed that spatially nonuniformity of wind distribution had a great influence on the movement of lake current.