高松平野における被圧地下水の水位上昇の機構

抄録

Continuous measurement at four stations in Takamatsu plain demonstrates that the confined groundwater levels in the central part of the plain has been recovering over the last decade. The present study aims to clarify its mechanism to provide fundamental information for the water resources. development Two-dimensional numerical simulation is carried out for the confined groundwater using the estimated groundwater withdrawals, the measured unconfined groundwater levels and the interpolated hydrogeologic parameters. The numerical results are found to well reproduce the trends in water level at four stations as well as the water levels at other points that were measured this year. The increase in groundwater level can be explained by the reduction in pumpage by some factories located in the central part of the plain.