Groundwater supply from rainfall to the Kakamigahara groundwater reservoir, Gifu prefecture, Nippon

摘要

A new estimation method for the water supply to a groundwater reservior from rainfall is proposed in this report. In the Kakamigahara City area, it is observed that rainfall of 10 mm upheaves 4.5-4.6 cm of groundwater level through analysis of a 8 years record. In this area, the average annual rainfall is about 2000 mm and the groundwater level upheaves 10 m every year.