The temperature distribution of groundwater in a confined aquifer was numerically analysis by the simulation model shown in Fig. -1.
These results offer substantial benefits when caning out hot water injection into water zone.

View full abstract

Volcano Aso is a depression caldera. In caldera the large quantities of ground wter flow to downward with slope. Then water quality of ground water change be caused by flow movement. Corresponding to change of water table elevation of ground water, we collected the sampling water each apuifer, and water analysis was done.
The following became clear after the investigation on the besis of the results. (1) Change of water temperature and electrical conductivity of groumd water show us difference of aquifers. (2) Variations of. composition in water samples, be caused by flow movement, are characteristic on anions and in general samples has qualitative character in volcanic basin.

View full abstract

Cross-plotting has been always used in doing the analysis of Oil-well logs.
This paper reports about two examples of cross-plots used in the water-well logs, as well as in the oil-well logs.
Their results clear that, high-permeable layer is extracted by Natural gamma-Resistivity crossplotting, and low-permeable layer (silt and/or clay) is extracted by Natural gamma-Density cross-plotting.

View full abstract

This paper discribes the theoretical and experimental study on the relation between the distribution of pumping intensity and the sea water intrusion through a unconfined aguifer in a 'coastal region. Both cases of the fresh water pumping and the salt water pumping are analyzed by applying Darcy's law and the equation of continuity under the assumption of the hydrostatic pressure distribution and two dimensional model. Analytical results agree well with experimental results in the tendency of the interface between sea water and fresh water corresponding to the various pumping conditions.

View full abstract