The following factors should be carefully studied for ground water development in hard rock areas: 1. In the conditions existing in hard rock areas shallow small diameter wells can at best yield 4 GPM or 250 GPH. The larger diameter wells can store up to 20,000 to 30,000 gallons in a day. A bore well drilled to a depth of [...]
Subsurface water can be mainly divided into two zones viz.: 1. Zone of Aeration 2. Zone of Saturation. 1. Zone of Aeration: In this zone the soil pores are partially filled with water. The space between the ground surface and the water table is the zone of aeration. Zone of aeration can be further divided into three zones: i. Soil [...]
Based on the property on which the method depends the geophysical techniques can be broadly classified as: 1. Gravity Prospecting 2. Magnetic Prospecting 3. Electrical and Electro-Magnetic Prospecting 4. Seismic Prospecting 5. Well Logging Techniques. 1. Gravity Prospecting Method: The gravity method of geophysical prospecting is based on the fact that the gravitational attraction of sub-surface bodies directly up on [...]