What happens if the ground water is used in excess?
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Groundwater depletion is primarily caused by sustained groundwater pumping. Some of the negative effects of groundwater depletion:
Excessive pumping can lower the groundwater table, and cause wells to no longer be able to reach groundwater.
As the water table lowers, the water must be pumped farther to reach the surface, using more energy. In extreme cases, using such a well can be cost prohibitive.
Groundwater and surface water are connected. When groundwater is overused, the lakes, streams, and rivers connected to groundwater can also have their supply diminished.
Land subsidence occurs when there is a loss of support below ground. This is most often caused by human activities, mainly from the overuse of groundwater, when the soil collapses, compacts, and drops.
Excessive pumping in coastal areas can cause saltwater to move inland and upward, resulting in saltwater contamination of the water supply