A simple model of leakage induced by deep pumping and its application to pollution beneath a city in Thailand
A simple model of leakage induced by deep pumping and its application to pollution beneath a city in Thailand
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DOI：
10.1007/s10040-008-0277-2
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发表时间：
2008-05-01
影响因子：
2.8
通讯作者：
Lawrence, Adrian R.
中科院分区：
文献类型：
--
作者：
Barker, John A.;Lawrence, Adrian R.
发展中国家的许多城市依赖地下水供水。这种地下水通常是从冲积层的半封闭含水层中抽取的。这些较深的含水层往往被认为是通过插入渗透性较低的层而免受污染的浅水的影响。然而，如果从城市正下方的半承压含水层抽取地下水，则可能会导致受污染的浅水发生重大渗漏。这可能导致较深含水层的水质长期严重恶化。已经开发了一个简单的模型，它提供了深入了解这种半封闭含水层的水质水力控制。该模型为初步评估和预测城市化对地下水水质的影响提供了工具。此外，该模型通过一个单一的参数，这里称为“城市渗漏系数”，它可以用来评估泄漏污染的脆弱性的关键水文地质行为的特点。泰国一个城市的案例研究说明了这种模式的使用。
Many cities in developing countries are dependent upon groundwater for water supply. Frequently this groundwater is pumped from semi-confined aquifers in alluvial deposits. These deeper aquifers are often considered to be protected from polluted shallow water by intervening less-permeable layers. However, where groundwater is pumped from a semi-confined aquifer immediately beneath a city, significant induced leakage of contaminated shallow water can occur. This may lead to a serious deterioration of water quality in deeper aquifers in the longer-term. A simple model has been developed which provides insight into the hydraulic controls on water quality in such semi-confined aquifers. The model provides a tool for the initial assessment and prediction of the impact of urbanization on groundwater quality. Also, the model characterizes the key hydrogeological behaviour through a single parameter, here termed the 'city leakage factor', which can be used to assess the vulnerability to contamination by leakage. A case study of a city in Thailand illustrates the use of this model.