Saltwater Upconing Below a Pumping Well in an Inland Aquifer: a Theoretical Modeling Study on Testing Different Scenarios of Deep Saline-Groundwater Pathways
Saltwater Upconing Below a Pumping Well in an Inland Aquifer: a Theoretical Modeling Study on Testing Different Scenarios of Deep Saline-Groundwater Pathways
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内陆含水层抽水井下方盐水上升：测试深层盐水-地下水通道不同情景的理论模型研究
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发表时间：
2014
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影响因子：
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通讯作者：
Michael Schneider
中科院分区：
文献类型：
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作者：
Jialiang Cai;T. Taute;Michael Schneider
迄今为止，尚未发表关于内陆含水层地质条件的研究报告，这些地质条件导致深层含盐地下水因抽水而上涌。因此，本文根据德国柏林西南部Beelitzhof水厂的现场情况，进行了理论模拟研究，提出了导致内陆含水层中抽水井下方盐水上升的深层盐水-地下水通道的两个假设，定义如下：（1）在Rupelian粘土中存在由冰川侵蚀造成的窗口，其位置不确定，（2）粘土中没有窗口，但由于冰川的侵蚀，粘土会部分变薄，但不会完全消失，因此盐只能通过扩散向上穿过粘土，最终积聚在粘土的顶部。这些假设进行了测试，以证明在粘土和井，以及作为盐通过粘土的扩散取决于其厚度的盐水入侵在抽水井的横向距离之间的影响，分别使用密度相关的地下水流和溶质运移模型。假设1验证了四种情况下，窗口可能出现在粘土在现场，他们的位置在某些条件下可以显着导致盐水入侵，而假设2可以排除，因为盐扩散通过粘土厚度大于1米的网站是不能够引起盐水入侵。
To date, studies on the geological conditions in inland aquifers leading to pathways for upwelling deep saline groundwater due to pumping have not been published yet. Therefore, this paper conducted a theoretical modeling study to raise two hypotheses about deep saline-groundwater pathways leading to saltwater upconing below a pumping well in an inland aquifer based on the field situation at the Beelitzhof waterworks in southwestern Berlin (Germany), defined as follows: (1) there are windows in the Rupelian clay caused by glacial erosion, where their locations are uncertain, and (2) there are no windows in the clay, but the clay is partially thinned out but not completely removed by glacial erosion, so salt can merely come through the clay upward by diffusion and eventually accumulate on its top. These hypotheses were tested to demonstrate the impact of the lateral distance between windows in the clay and the well, as well as salt diffusion through the clay depending on its thickness on saltwater intrusion in the pumping well, respectively, using a density-dependent groundwater flow and solute transport model. Hypothesis 1 was validated with four scenarios that windows could occur in the clay at the site, and their locations under some conditions could significantly cause saltwater intrusion, while hypothesis 2 could be excluded, because salt diffusion through the clay with thickness greater than 1 m at the site was not able to cause saltwater intrusion.