1999 Volume 41 Issue 3 Pages 177-191
Phosphorus concentration in the underground and spring waters used for tap water in Yamanashi and Shizuoka prefecture was studied and distinct differences of phosphorus concentration between two areas were found. Specifically, the underground and spring waters at the foot of Mt. Fuji have high phosphorus concentrations (0.089mg/l - 0.212mg/l ) and the underground and spring waters in the Kofu basin have low phosphorus concentrations (0.003mg/l -0.082mg/l).
The strata at the foot of Mt. Fuji mainly consist of basaltic rocks and sediments. On the other hand, the strata of the Kofu basin generally consist of andesitic and granitic rocks and sediments. It is well known that basalt has a high concentration of phosphorus, followed by andesite with moderate concentrations and granite which has poor phosphorus concentration.
We conclude that the regional differences of phosphorus concentration in the underground and spring waters located at the foot of Mt. Fuji and in the Kofu basin can be explained by geochemical conditions rather than artificial effects.
