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首页> 美国政府科技报告 >Impact of Improved Agricultural Water Use Efficiency on Reservoir Storage in Sub-Humid Areas
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Impact of Improved Agricultural Water Use Efficiency on Reservoir Storage in Sub-Humid Areas

机译：提高农业用水效率对亚湿润地区水库蓄水量的影响

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Surface water yield from semiarid and subhumid regions of the Great Plains have been decreasing since the 1950s. Changes in agricultural technology on non-irrigated areas including practices which permanently retain water (ponds and level terraces) and increase infiltration (residue management) are the main factors. Development of irrigation from surface water supplies and withdrawals of groundwater from alluvial aquifers are also important. The work used methodology developed previously to estimate the effects of agricultural technology developments, particularly on non-irrigated areas, to reduce streamflow in a subhumid region. Current net reduction in the lower portion of the Republican River basin was estimated to be 15 percent of total potential streamflow and will increase to 22 percent by 2025. About 25 percent of the gross reduction in surface runoff from these areas is expected to subsequently become streamflow or to satisfy depletions of streamflow.

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