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A Simple Method for Locating the Fresh Water-Salt Water Interface Using Pressure Data

机译：利用压力数据定位淡水-盐水接口的简单方法

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摘要

Salt water intrusion is a key issue in dealing with exploitation, restoration, and management of fresh ground water in coastal aquifers. Constant monitoring of the fresh water-salt water interface is necessary for proper management of ground water resources. This study presents a simple method to estimate the depth of the fresh water-salt water interface in coastal aquifers using two sets of pressure data obtained from the fresh and saline zones within a single borehole. This method uses the density difference between fresh water and saline water and can practically be used at coastal aquifers that have a relatively sharp fresh water-salt water interface with a thin transition zone. The proposed method was applied to data collected from a coastal aquifer on Jeju Island, Korea, to estimate the variations in the depth of the interface. The interface varied with daily tidal fluctuations and heavy rainfall in the rainy season. The estimated depth of the interface showed a good agreement with the measured electrical conductivity profile.
机译：咸水入侵是处理沿海含水层中淡水开采，恢复和管理的关键问题。为了适当管理地下水资源，必须不断监测淡水-盐水接口。这项研究提出了一种简单的方法，可以使用从单个钻孔内的淡水和盐渍区获得的两组压力数据来估算沿海含水层中淡水-盐水界面的深度。这种方法利用了淡水和盐水之间的密度差，可以实际用于沿海淡水层，这些淡水具有相对较尖的淡水-盐水界面和较薄的过渡带。拟议的方法应用于从韩国济州岛的一个沿海含水层收集的数据，以估计界面深度的变化。界面随每日潮汐波动和雨季大雨而变化。界面的估计深度与测得的电导率曲线显示出良好的一致性。

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