MONITORING OF THE WIND DISTRIBUTION ON A RESERVOIR AND A SIMPLE ESTIMATION METHOD OF WIND SPEED

Abstract

 A monitoring system of wind direction and wind speepd were developed to investigate wind distribution on a meandering reservoir. Small anemometer with compasses for leisure use was attached to the tip of the buoy-system, and it was deployed in eight stations in the Ogouchi Reservoir. The data obtained during three months were compared with the wind data of AMeDAS in the lakefront. It was found that the wind speed measured on the reservoir was approximately two times higher than the wind of AMeDAS, wind blows along a valley, and the ratio of wind speed increased in propotion to the wind fetch. A simple method to estimate a wind speed on the researvoir using AMeDAS data, the ratio of wind speed and the wind fetch was proposed. The estimated wind speed agreed with the meadured wind speed well.