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A cone of depression is a circular area surrounding a well where groundwater levels are reduced from pumping. [1] [2] In an unconfined aquifer (water table), this is an actual depression of the water levels. In confined aquifers , the cone of depression is a reduction in the pressure head surrounding the pumped well.
The Colorado River Aqueduct added six pumps to the original three at each of its five pumping stations. CRA pumping expanded from about 16,500 acre-feet (20,400,000 m 3) of water in 1950 to about 1,029,000 acre-feet (1.269 × 10 9 m 3) by 1960. On August 9, 1962, the Metropolitan set an all-time delivery record of 1,316,000,000 gallons of water ...
where s is the drawdown (change in hydraulic head at a point since the beginning of the test in units of distance), u is a dimensionless parameter, Q is the discharge (pumping) rate of the well (volume per unit time), T and S are the transmissivity and storativity of the aquifer around the well (distance squared per unit time and dimensionless ...
There is one provider of public education in the State of Hawaii, the Hawaii Department of Education (HIDOE), dependent on the Hawaiian state government. The word "school districts" in Hawaii is instead used to refer to internal divisions within HIDOE, and the U.S. Census Bureau does not count these as local governments.
Diversion dams, pumping plants, and aqueducts provide municipal water supply as well as irrigation of about 100,000 acres (4,000,000 dam 2). [562] The Red Bluff Diversion Dam diverts part of the Sacramento River [563] into the 110-mile (180 km) Tehama-Colusa Canal, the 21-mile (34 km) Corning Canal and a small reservoir formed by Funks Dam. [564]
The U.S. Geologic Survey measured a zero cubic feet per second discharge from the well. The recommended flow rate is 4 to 7 cubic feet per second.
Pumping Station No. 2: Van Ness Avenue and San Francisco Bicycle Route 2 in Fort Mason. Both stations are capable of pumping 10,000 US gallons per minute (38,000 L/min) of salt water at a pressure of 300 pounds per square inch (2,100 kPa) with on-site generators. Pumping Station No. 2 is listed on the National Register of Historic Places.
In hydrology, a well test is conducted to evaluate the amount of water that can be pumped from a particular water well.More specifically, a well test will allow prediction of the maximum rate at which water can be pumped from a well, and the distance that the water level in the well will fall for a given pumping rate and duration of pumping.