Singh V S
National Geophysical Research Institute, Hyderabad, AP, India.
J Environ Manage. 2008 Oct;89(1):58-62. doi: 10.1016/j.jenvman.2007.01.049. Epub 2007 May 16.
The aquifer and groundwater regime has been affected by the earthquake and tsunami of December 26, 2004, particularly on the islands and coastal regions of India. The groundwater regime on many islands of Andaman and Nicobar islands, which is the only source of fresh water on the islands, has been found to be deteriorated. Detailed hydrogeological studies have been carried out at one of the tiny islands of Andaman, namely Neill Island, and results have been compared with prior observations. It has been found that the shell limestone aquifer at a few places has developed cracks due to the earthquake and these openings have allowed quick movement of seawater into the aquifer resulting into deterioration of groundwater quality. In the places where the aquifer is at sea level, the tsunami waves have caused seawater ingress. Most parts of the island which have hard mudstone as a base and where the aquifer lies much above sea level, did not show any change in groundwater regime.
2004年12月26日的地震和海啸对含水层及地下水状况产生了影响，在印度各岛屿及沿海地区尤为如此。安达曼和尼科巴群岛的许多岛屿上，作为岛上唯一淡水来源的地下水状况已被发现恶化。在安达曼的一个小岛尼尔岛上开展了详细的水文地质研究，并将结果与之前的观测数据进行了比较。结果发现，一些地方的贝壳灰岩含水层因地震出现了裂缝，这些开口使得海水迅速流入含水层，导致地下水水质恶化。在含水层位于海平面的地方，海啸波引发了海水倒灌。该岛大部分地区以硬泥岩为基底，含水层位于海平面以上较高位置，地下水状况未出现任何变化。
