STUDY ON DRIFT CHARACTERISTICS OF THE DRIFTAGE IN YATSUSIRO SEA

Abstract

 Yatsushiro Sea is a closed water area, and the wave height is low. Therefore, the sea water exchange with open area is not good. Furthermore, the driftage is running from Kumagawa River, and they drift with the tidal current and wind effect. In this study, drift characteristics of the driftage in Yatsushiro Sea are investigated by a drifting small buoy system equipped a GPS receiver, numerical analysis, a field work, inspection and a questionnaire survey. As a result, it was confirmed that the direction of the wind have a great influence on the drift characteristics of the driftage.