地ち下か水すい面めん

noun

water table; groundwater level

Geological term for the upper surface of groundwater. Used in scientific and environmental contexts.

• この地ち域いきでは地ち下か水すい面めんが年ねん々ねん低てい下かしている。

  In this area, the water table has been dropping year by year.

• 井い戸どを掘ほる前まえに地ち下か水すい面めんの深ふかさを調しらべた。

  Before digging the well, we checked the depth of the groundwater level.