Abstract
For the development of geothermal energy, many observations to determine the hydrolgical relatinship between the thermal water and stream water have been carried out at seven sites in the lower reach of the Fukiage River on March to July,1975.
The principal factors to be considered are the discharges, temperature and chloride contents of both waters.
From interpreting these data, it was able to know a part of hydrological system of the thermal water into the Fukiage River from Fukiage Hot Springs.
