抄録
Observations in the Nabebuta and Kaioku districts show that the deep artesian water is not contaminated by the sea water, despite of the saline damage in the ground surface owing to the saline water percolation through the earth dam. The artesian heads in those areas are measured to be always lower than the sea level. These results suggest the existence of the impermeable layer between the aquifer and the sea water. Tidal changes in the water levels of four artesian wells are observed and are found the results corresponding with theoretically presented by the author under the assumption that the tidal effect on the artesian head is only due to the fluctuations in the loading weight upon the submarine aquifer. Some of the values which represent the characteristics of the aquifer are computed in using the analytical treatment from the observed results.
