GEOLOGY

Detailed explanation-1: -Groundwater is all the water that has penetrated the earth’s surface and is found in one of two soil layers. The one nearest the surface is the “zone of aeration", where gaps between soil are filled with both air and water.

Detailed explanation-2: -Groundwater is found in two zones. The unsaturated zone, immediately below the land surface, contains water and air in the open spaces, or pores. The saturated zone, a zone in which all the pores and rock fractures are filled with water, underlies the unsaturated zone.

Detailed explanation-3: -Water beneath the surface can essentially be divided into three zones: 1) the soil water zone, or vadose zone, 2) an intermediate zone, or capillary fringe, and 3) the ground water, or saturated zone.

Detailed explanation-4: -the pore spaces in the saturated zone are completely full of water; the pore spaces in the unsaturated zone are not completely full of water.