In the heavy snow fall area, Yonezawa, Nagaoka, etc., they have taken a good use of snow melting pipes. But these are not sufficiently familiar to that district, for the water supply is poor. And so we have had an idea of a use of a stratum for a regenerator by artificial recharge and a reuse of repumped water for snow melting pipes. Injecting cooling waste water has been investigated since before, but water surface up-lift effects when restoration of injection and quantitative analysis for heat storage are not successfully studied.
We have injected at rate of 0.7m⁸/min for a month, and examined ( i ) the reason why we could inject, (ii) the up-lift effect near wells, and (iii) the regenerating effect, from isotrapy of the peameable, comparing the experimental piezometric surface with the ideal, and water quality and temperature change.
The experimental field is situated in a southern part in Yarnagata basin. The aquifers are 40m and 80m in depth. The injection, the observation and the discharge wells are drilled at the corners of the 22.4m equilateral triangle. In isotrapic confined aquiefers if the flow is subject to Darcy's law and the deficiency of the boreholes is negligible, thg steady state piezometric surface is given by equation ( 4 )

抄録全体を表示

In the spring of 1968, the deep well in Tuna town was significantly polluted with sea water, We have performed hydrogeological investigation to solve the cause of the sea-water pollution.
The results showed that the sea-water intrusion occurred primarily in the basal conglomerate bed of the Osaka Group through an active fault as a result of over pumping of the deep wells nos.3 and 7.

抄録全体を表示

A method for determining effective thermal conductivity of an aquifer is developed in this study. The analytical and experimental studies were conducted by using one-dimensional flow model.
The experimental equipment is shown in Fig.2. The pipe packed with glass-beases was used as a porous media. The dimensionless groups of temperature, distance and effective thermal conductivity were defined in Eq. ( 2 ), Eq. (3 ) and Eq. ( 5 ), respectively. The thermal comductivity may be predicted by using Fig.1 shown the relationship between dimensionless groups. Although the study was based on one-dimensional flow model, the results may be extended for on aquifer in a field.

抄録全体を表示