南水北调输水对梁济运河区域地下水位的影响

Influence of Delivering Water of the South-to-North Water Transfer Project on the Groundwater Level in Liangji Canal Zone

以南水北调东线工程输水前后,梁济运河区地下水位、降水、地下水埋深和输水时间作为研究要素,运用灰色关联分析方法对南水北调输水对梁济运河区地下水位的影响进行了分析。结果表明:1输水后,降水对地下水位的影响减弱,其与地下水位变幅之间的关联度由输水前的0.8降至输水后0.69左右;2南水北调输水对地下水位的影响较大,其与地下水位变幅之间的关联度达到0.71;3在输水时间增长的情况下,输水与地下水位变幅之间的关联程度呈现出递增趋势;4南水北调输水对梁济运河二岸6.6km区域内地下水位的影响明显大于6.6km之外的区域。

The influence of the South-to-North Water Transfer Project on the groundwater level was analyzed by using the gray correlation analysis method,and groundwater levels,precipitation,groundwater depth and water delivering time were selected as research elements in Liangji Canal Zone according to the before and after water delivery on the East Route of the South-to-North Water Transfer Project.The results showed that the influence of the precipitation on the groundwater level subsided,and the correlation degree between the precipitation and the amplitude of the groundwater level decreased from 0.8before water delivery to 0.69 after water delivery;the influence of the water diversion by the South-to-North Water Transfer Project on the groundwater level was high,and the correlation degree between the water delivery and the amplitude of the groundwater level was up to 0.71;in the case of increasing the water delivering time,the correlation degree between the water delivery and the amplitude of the groundwater level was increased progressively;the effect of the groundwater level in the 6.6km area of the two sides of Liangji Canal Zone was significantly higher than that of beyond it due to delivering water of the South-to-North Water Transfer Project.