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本文通过对石家庄平原区粮食产量和地下水开采量及埋深动态变化特征的分析,揭示了粮食产量增加对地下水的影响机制。结果表明,除丰水年和枯水年份外,研究区地下水埋深不随主要补给项降水量的增减而表现出明显的增减变化,而与主要排泄项开采量关系密切,表现出明显的开采特性。小麦玉米产量的增加是驱动地下水开采量和埋深变化的根本动因,1982年以前,小麦玉米产量每增加1×104t,开采地下水量将增加1400×104m3,地下水埋深增加0.0448m;从1982年开始,小麦玉米产量每增加1×104t,地下水累积超采量平均增加3000×104m3,地下水埋深增加0.0705m。
In this paper, through analyzing the characteristics of dynamic changes of grain yield, groundwater extraction and burial depth in the plain of Shijiazhuang, the mechanism of the effect of grain yield increase on groundwater is revealed. The results showed that the groundwater depth of the study area did not change significantly with the increase or decrease of precipitation of major recharge items, except for the wet years and the dry years, but closely related to the main drainage items, showing obvious Mining characteristics. Increasing output of wheat and corn is the fundamental driving force for the change of groundwater extraction and burial depth. Before 1982, the output of wheat and corn increased by 1 × 104t and the groundwater exploitation increased by 1400 × 104m3 and the groundwater depth increased by 0.0448m. From 1982 At the beginning, for every increase of 1 × 104t of wheat and corn production, the cumulative over-extraction of groundwater increased by 3000 × 104m3 on average, and the groundwater depth increased by 0.0705m.