Groundwater Environment Research Center, Climate Change Response Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, Republic of Korea.
Department of Geology, College of Natural Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea.
Ground Water. 2024 Jul-Aug;62(4):635-644. doi: 10.1111/gwat.13366. Epub 2023 Oct 31.
Coastal aquifers are complex systems governed by fresh-saline water interactions and ocean tidal effects. The vertical electrical conductivity (EC) and temperature (T) are general indicators for detecting the fresh-saline water interface (FSI) and sea water intrusion in groundwater wells located in coastal aquifers. In this method brief, we developed a cost-effective Arduino-based automatic-vertical profile monitoring system (A-VPMS) to continuously record vertical EC and T in groundwater wells, with the aim of testing its effectiveness in spatiotemporal monitoring of the FSI in a coastal aquifer located in eastern Korea. By analyzing the high-density EC and T data obtained by the A-VPMS, we evaluated the characteristics of the FSI, such as depth and spatial distribution. Our established EC and T data collection method using the A-VPMS proved to be efficient and reliable, providing an excellent tool for fine-scale temporal and spatial understanding of sea water intrusion. The results of this study demonstrate the potential of the A-VPMS for continuous monitoring of the FSI in coastal aquifers, which is crucial for sustainable management of groundwater resources.
沿海含水层是由淡水-盐水相互作用和海洋潮汐影响控制的复杂系统。垂直电导率 (EC) 和温度 (T) 是探测位于沿海含水层中的地下水井中淡水-盐水界面 (FSI) 和海水入侵的常用指标。在本方法简介中，我们开发了一种具有成本效益的基于 Arduino 的自动垂直剖面监测系统 (A-VPMS)，以连续记录地下水井中的垂直 EC 和 T，目的是测试其在韩国东部沿海含水层中 FSI 的时空监测中的有效性。通过分析 A-VPMS 获得的高密度 EC 和 T 数据，我们评估了 FSI 的特征，例如深度和空间分布。我们使用 A-VPMS 建立的 EC 和 T 数据采集方法证明是高效和可靠的，为精细时空理解海水入侵提供了极好的工具。本研究的结果表明，A-VPMS 具有在沿海含水层中连续监测 FSI 的潜力，这对于地下水资源的可持续管理至关重要。
