RECHARGE RATIO OF SURFACE WATER INFILTRATION OF RIVERSIDE WELL FIELDS ALONG THE HARBIN SECTION OF THE SONGHUA RIVER
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摘要: 在松花江哈尔滨段某傍河水源地开展抽水试验,采用水动力学解析法和以保守组分为示踪剂的环境示踪法,估算该傍河水源地地表水的补给比例,分析其在开采过程中的变化。结果表明:傍河水源地在开采过程中,地表水补给比例随着地下水位下降而增加,在流场稳定后,比例趋近稳定。当研究区开采水位稳定时,采用2种方法估算傍河开采水中地表水的占比均约为60%,2种方法相互佐证。傍河水源地的调蓄作用明显,地表水对其补给量对江河的影响很小,不会威胁地表水的安全与稳定。该研究成果可为松花江沿岸条件类似地区建设傍河水源地提供决策支持和实践参考。Abstract: The pumping test is carried out in a riverside well field along the Harbin section of the Songhua River. The recharge ratio of surface water infiltration of a riverside well field was estimated by using hydrodynamic analytical method, and environmental tracing method, and its changes during pumping were analyzed. The results showed that the recharge ratio of surface water increased with the decrease of groundwater level when pumping in the riverside well field, and tended to be stable after the flow field got stable. When the groundwater level in the study area was stable, it was estimated that the surface water captured by pumping accounted for about 60% of the yield by the two methods, and the two methods supported each other. The storage function of the riverside well field was obvious. The pumping impact on surface water was small, and the safety and stability of surface water wouldn't not be affected. The research can provide decision support and practical reference for the construction of riverside well fields along the Songhua River with similar conditions.
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