Subsidence from overpumping aquifers can lead to land sinking due to pore collapse and compression. Groundwater mining causes subsidence by depleting clay layers and allowing saltwater intrusion. Areas like Arizona and California experience subsidence from the solid skeleton of aquifers bearing more load.
Subsidence can occur when too much water is removed from aquifers, leading to the collapse of pores in the aquifer and causing the land surface to sink. This is particularly risky in areas with unconsolidated sediments that can compact, such as those with multiple layers of clay.
One consequence of groundwater mining is the depletion of clay layers within aquifers, leading to compression of the aquifer and resulting in subsidence. Overpumping of fresh water aquifers near ocean coastlines can also lead to saltwater intrusion, contaminating the aquifer and causing further subsidence.
Regions experiencing subsidence due to groundwater mining include Arizona, California, Texas, and other areas, where the load on the solid skeleton of the aquifer increases, causing the land surface to sink.
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