http://droughtreporter.unl.edu/

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Excessive groundwater pumping and resulting land subsidence has two Merced County men, a farmer and the general manager of San Luis Canal Co., working together, recruiting area farmers to create solutions that prevent additional subsidence but meet water needs. Shifting soils have caused area wells to collapse, and three feet of subsidence in the last five years will force the San Luis Canal Co. to rebuild part of Sack Dam if it is to hold water rather than spill it. Some mitigative efforts could include absorbing more rainwater in fallow fields for storage underground, storing floodwater, using highly efficient irrigation methods, lobbying for new reservoirs and possibly regulating California groundwater. San Francisco Chronicle (SFGate.com), July 26, 2014