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The amount of recharge that occurs in the San Joaquin Valley is very dependent on the amount of rain received in winter and spring months and county policy. Roughly 55% of groundwater in the San Joaquin Valley is recharged via local precipitation, while 45% is recharged via river water recharge.
San Joaquin Valley surface change. The arid areas of the world are requiring more and more water for growing populations and agriculture. In the San Joaquin Valley of the United States, groundwater pumping for crops has gone on for generations. This has resulted in the entire valley sinking an extraordinary amount, as shown in the figure. [4]
Land elevation loss from excessive ground water pumping is memorialized in the telephone pole photo taken in the San Joaquin Valley. [10] The yellow sign he is holding reads, "San Joaquin Valley California BMS661 Subsidence 9M 1925-1977." This photo shows 28 feet of lost surface level altitude over a 52-year period. [11]
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.
California water regulators are cracking down on a second farming area in the San Joaquin Valley for failing to take adequate steps to curb overpumping that is depleting groundwater, causing the ...
From October 2011 to September 2015 measurements made on groundwater levels in the San Joaquin Valley's aquifers recorded a loss of 14 km 3 /year, a total of 56 km 3. [26] During this same period up to 1,000 mm of land subsidence was measured in the San Joaquin Valley. [26]
Importation of surface water to agricultural areas in the San Joaquin Valley, California, via the California Aqueduct from the late 1960s. [78] [79] [34] Shanghai, China Marine sediments 87 (2019-2020) Groundwater extraction The economic loss caused by ground subsidence in Shanghai from 2001 to 2020 amounted to over 24.57 billion yuan.
An 1873 map shows Tulare Lake prior to shrinkage from large-scale agriculture.. The San Joaquin Valley is the southern half of California's Central Valley. [4] It extends from the Sacramento–San Joaquin River Delta in the north to the Tehachapi Mountains in the south, and from the California coastal ranges (Diablo and Temblor) in the west to the Sierra Nevada in the east.