Determination of the distance of the fresh water–salt water interface extending into coastal confined aquifers
Determination of the distance of the fresh water–salt water interface extending into coastal confined aquifers
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DOI：
10.1007/s12665-013-2537-2
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发表时间：
2014-02
影响因子：
2.8
通讯作者：
Xun Zhou
中科院分区：
文献类型：
--
作者：
Xun Zhou
在沿海地区，了解淡水-盐水界面的距离及其向内陆的延伸对于防止海水入侵是重要的。本文介绍了根据海底淡水排泄量计算滨海承压含水层淡水-咸水界面距离的估算方法。这种地下水排泄不仅受含水层性质和水头差的控制，而且还受海岸带淡水-盐水界面位置的控制。考虑了均质各向同性的滨海承压含水层，认为承压含水层中的地下水流处于稳定状态。在海岸带界面趾距计算中，需要在垂直于海岸线的剖面上设置两个不同距离的威尔斯观测井。四个沿海承压含水层水平和倾斜的封闭床和不同厚度的也被认为是。通过实例说明了方法的应用，得到了合理的结果。该方法需要两口威尔斯井的水头和承压含水层的厚度，但不需要承压含水层的导水率和新鲜地下水流量。
In a coastal zone an understanding of the distance of the fresh water–salt water interface and its extension inland is important for prevention of sea water intrusion. In this article estimating methods are described for calculating the distance of a fresh water–salt water interface in a coastal confined aquifer based on the submarine fresh groundwater discharge. This groundwater discharge is controlled not only by the aquifer properties and hydraulic head difference, but also by the position of the fresh water–salt water interface in the coastal zone. A homogeneous and isotropic coastal confined aquifer is considered and fresh groundwater flow in the confined aquifer is thought to be at a steady state. Two observation wells at different distances in a profile perpendicular to the coastline are required in calculation of the distance of the interface toe in the coastal zone. Four coastal confined aquifers with horizontal and sloping confining beds and with varying thickness are also considered. Reasonable results are obtained when examples are used to illustrate the application of the methods. The methods require hydraulic head data at the two wells and thickness of the confined aquifers, but the hydraulic conductivity and fresh groundwater flow rate of the confined aquifers are not needed.