This article throws light upon the top seven methods used for construction of wells. The methods are: 1. Digging 2. Boring 3. Driving 4. Jetting 5. Cable Tool Drilling 6. Direct Rotary Drilling 7. Reverse Rotary Drilling. Method # 1. Digging: Wells in shallow and unconsolidated glacial and alluvial aquifers can be dug by hand using a pick and shovel. [...]
The major types of variable displacement pumps are as follows: 1. Centrifugal Pumps 2. Jet Pumps 3. Air-Lift Pumps. Type # 1. Centrifugal Pumps: Centrifugal pumps are the most popular types of variable displacement pumps. They are capable of delivering large volumes of water against high as well as low heads with good efficiency. Besides, these pumps are relatively simple [...]
Flow of ground water through porous medium is governed by well-known Darcy's law which states that the rate of flow, Q through a saturated porous medium is: (i) Proportional to the difference in hydraulic head Ah between the two flow sections, (ii) Proportional to the area of flow cross-section A, and (iii) Inversely proportional to the length, L between the [...]