57. Seasonal Changes in the Groundwater-Seawater Interaction and Its Relation to Submarine Groundwater Discharge, Ise Bay, Japan

The purpose of this study is to elucidate the conditions of seasonal changes in the fresh and salt water distribution, and the control factors of the relationship between the groundwater flow system and submarine groundwater discharge (SGD) at Ise Bay, Japan. The results indicate that the groundwater levels and qualities have different seasonal change patterns in each depth at the measurement sites. Deep freshwater discharges as SGD in the irrigation season. The water quality of the SGD changes is affected by groundwater-seawater interaction. Seasonal changes in the groundwater-seawater interaction are controlled by geology, recharge water, and tidal conditions.