Ground water table may be lowered by method

Explanation:

Groundwater Lowering Method :

The groundwater table can be lowered by methods

• Ditches and dumps.
• Well, point system.
• Shallow good system.
• Deep well system.
• Vacuum method.
• Electro-osmosis method.

Additional Information Deep Wells: 

• These wells are as deep as 70 to 300 meters and tap more than one aquifer. Such wells may yield as high as 200 to 225 liters/sec. The general average yield from the standard tube wells is about 40 to 45 liters/sec.

Shallow Wells: 

• These wells have a depth of about 20 to 70 meters and tap only one aquifer. Such wells may yield as high as 15 to 20 liters/sec.

∴ Deep wells have greater yields (discharge) as compared to shallow wells.

 Confusion Points

Although most of the time, the deeper well has deeper depth, sometimes a well with high discharge and lesser depth is classified as a deep well. So deep well is always deeper than a shallow well may not hold true always.