海岛淡水透镜体形成及倒锥演变规律分析

• 作 者: 赵军 温忠辉 束龙仓 甄黎 周从直
• 机 构: 水文水资源与水利工程科学国家重点实验室河海大学,解放军后勤工程学院,
• 出 处: 工程勘察
• 发表日期: 2009年05期
• 关键词: 透镜体 淡水 室内实验 过渡带 电导率值 开采强度 倒锥 降雨入渗 观测孔 潜水面

本文采用自制的室内物理模型,对海岛淡水透镜体的演变过程进行了模拟实验。为了避免电导率测定值受自然因素等的影响,实验采用观测孔测得的电导率值与海水电导率值的相对值作为刻画淡水透镜体形状的手段。实验结果表明:降雨强度越大,则降雨入渗量越大、淡水透镜体越厚,透镜体厚度最终稳定在22cm;开采强度越大,透镜体越易被击穿。这一结果不仅为海岛淡水资源的开发利用提供了理论基础,同时为国内外开展相关研究提供参考。

In this paper, a self-made indoor physical model was used to simulate the evolution of island freshwater lens. In order to avoid the influence of natural factors on the measured value of conductivity, the relative value of conductivity and seawater conductivity measured by observation hole was used as a means to characterize the shape of freshwater lens. The experimental results show that the larger the rainfall intensity is, the larger the infiltration is. The thicker the freshwater lens body is, the thickness of the lens body finally stabilizes at 22cm. The larger the mining intensity is, the easier the lens body penetrates. This result not only provides a theoretical basis for the development and utilization of island freshwater resources, but also provides a reference for the relevant research both at home and abroad.