自じ噴ふん井せい

noun

artesian well

Geological term for a well from which water flows naturally under pressure without pumping.

• この地ち域いきには自じ噴ふん井せいが多おおく、地ち下か水すいが自し然ぜんに湧わき出でている。

  There are many artesian wells in this area, and groundwater flows out naturally.