Department of Geology, Anna University, Chennai, India.
Environ Sci Pollut Res Int. 2019 Nov;26(31):31592-31608. doi: 10.1007/s11356-019-06103-z. Epub 2019 Sep 9.
Intrusion of seawater into the coastal aquifers is a major concern as it affects the quality of groundwater. The objective of this study is to delineate the extent of seawater intrusion in the Indian coast based on previous studies and estimate the area as well as locations of seawater intrusion and submarine groundwater discharge based on the groundwater level of the years 2007 and 2017. Several researchers have reported seawater intrusion in the coastal regions of India by different methods of investigation. These studies indicate that the east coast of India is affected greater than the west coast by seawater intrusion. The maximum extent (about 14 km) of seawater intrusion in India is reported in regions north of Chennai. It is estimated that around 7% of the total coastal area is affected by seawater intrusion, where groundwater is below mean sea level. Around 57% of the coastal area of India has groundwater level in the range from 0 to 10 m msl. Future research needs to focus on the areas where seawater intrusion and submarine groundwater discharge were identified based on this study.
海水入侵沿海含水层是一个主要关注点，因为它会影响地下水的质量。本研究的目的是根据以往的研究，描绘印度海岸海水入侵的范围，并根据 2007 年和 2017 年的地下水位估计海水入侵和海底地下水排泄的面积和位置。几位研究人员通过不同的调查方法报告了印度沿海地区的海水入侵。这些研究表明，印度东海岸受海水入侵的影响大于西海岸。据报道，印度海水入侵的最大范围（约 14 公里）在钦奈以北的地区。据估计，大约 7%的沿海地区受到海水入侵的影响，那里的地下水低于平均海平面。印度约 57%的沿海地区的地下水位在 0 到 10 米之间。未来的研究需要集中在根据本研究确定了海水入侵和海底地下水排泄的地区。
