GENERAL GEOLOGY

Detailed explanation-1: -Water below the ground is available in four zones, viz., soil zone, intermediate zone, capillary zone and saturation zone. The zone where water is available is called the zone of aeration.

Detailed explanation-2: -Subsurface Water Water beneath the land surface occurs in two principal zones, the unsaturated zone and the saturated zone (Figure A-1). In the unsaturated zone, the voids–that is, the spaces between grains of gravel, sand, silt, clay, and cracks within rocks–contain both air and water.

Detailed explanation-3: -ZONE OF AERATION: The area of an unconfined aquifer above the water table where the pore spaces among soil particles and rock formations are filled with air.

Detailed explanation-4: -The vadose water is further subdivided into three zones, i.e., soil water zone, intermediate zone and capillary zone.

Detailed explanation-5: -The zone of aeration consists of three parts: the belt of soil water, the intermediate belt, and the capillary fringe. The belt of soil water, lying just below the land surface, consists of soil and loose materials from which water may be discharged into the atmosphere by plant transpiration or by direct evaporation.