How Has The Sustainability Of North American Aquifers Changed In Recent History
periodical article
Proceedings of the National University of Sciences of the United States of America
Published By: National University of Sciences
https://world wide web. jstor .org/stable/41602661
Aquifer overexploitation could significantly impact crop production in the United States considering 60% of irrigation relies on groundwater. Groundwater depletion in the irrigated Loftier Plains and California Central Valley accounts for ~l% of groundwater depletion in the United States since 1900. A newly adult Loftier Plains recharge map shows that loftier recharge in the northern High Plains results in sustainable pumpage, whereas lower recharge in the central and southern High Plains has resulted in focused depletion of 330 km³ of fossil groundwater, more often than not recharged during the past 13,000 y. Depletion is highly localized with almost a third of depletion occurring in 4% of the High Plains land area. Extrapolation of the electric current depletion rate suggests that 35% of the southern High Plains will be unable to support irrigation inside the next xxx y. Reducing irrigation withdrawals could extend the lifespan of the aquifer but would not effect in sustainable direction of this fossil groundwater. The Central Valley is a more dynamic, engineered organisation, with n/south diversions of surface water since the 1950s contributing to ~7× higher recharge. Even so, these diversions are regulated because of impacts on endangered species. A newly developed Central Valley Hydrologie Model shows that groundwater depletion since the 1960s, totaling 80 km³, occurs mostly in the south (Tulare Basin) and primarily during droughts. Increasing h2o storage through bogus recharge of excess surface water in aquifers by upwardly to 3 km³ shows promise for coping with droughts and improving sustainability of groundwater resources in the Central Valley.
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Source: https://www.jstor.org/stable/41602661
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