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Groundwater pumping has been causing the land to sink at a record pace in California's San Joaquin Valley. New research suggests ways of addressing the problem. ... but over a shorter time ...
Groundwater-related subsidence is the subsidence (or the sinking) of land resulting from unsustainable groundwater extraction.It is a growing problem in the developing world as cities increase in population and water use, without adequate pumping regulation and enforcement.
It is a growing problem in the developing world as cities increase in population and water use, without adequate pumping regulation and enforcement. One estimate has 80% of serious U.S. land subsidence problems associated with the excessive extraction of groundwater. [21]
California’s San Joaquin Valley may be sinking nearly an inch per year due to the over-pumping of groundwater supplies, with resource extraction outpacing natural recharge, a new study has found.
The state groundwater law, which was signed nearly 10 years ago, requires local agencies in many areas to develop groundwater plans and curb overpumping by 2040.
In the United States, land subsidence from over pumping has affected 45 states and accounts for changes in over 17,000 square miles of land which is an area almost 10 times the size of Glacier National Park in Montana. [14] The process of compaction is reversible to a point. [15] Water acts as a filler in the space between soil particles.
Mayes told reporters Wednesday that the Arizona Legislature has done nothing to fix the groundwater problem despite knowing about the problem for years. “While laws regulating groundwater pumping could have prevented this situation, the legislature’s inaction has allowed the crisis to grow,” Mayes said.
The main contributor to groundwater drawdown since the 1960s is over-exploitation of groundwater resources. [2] Drawdown occurs in response to: pumping from the bore; interference from a neighbouring pumping bore; in response to local, intensive groundwater pumping; regional seasonal decline due to discharge in excess of recharge [3]