The water present in the subsurface is considered as a high treasured water source. The present study deals with the delineation of groundwater potential zone in Tirunelveli Taluk, Tamil Nadu, South India. The study area lies between longitude 77°32′16″ to 77°48′8″E and latitude 8°40′12″ to 8°56′34″N with an area of 558.42 km². The groundwater potential zone of the Tirunelveli Taluk was inferred by the following layers, namely geology, geomorphology, lineament density, drainage density, rainfall, slope, soil and land use/land cover. These layers are digitized with the scale of 1:50,000 in GIS environment from the spatial data sources such as SOI topographic maps, GSI geology map, LANDSAT 8 satellite image, SRTM DEM, Tamil Nadu Agricultural Department daily rainfall data and available existing maps. The weights of the feature layers and ranking of each feature classes arrive from the pairwise comparison techniques of AHP technique. The prepared thematic maps are reclassified based on the influence of the layers feature classes on the groundwater availability. Finally, the reclassified layers are overlaid using weighted overlay tool to prepare groundwater prospect map. The finally this study resulted that 5.76 km² of the study area is identified as very high groundwater potential. The high potential area covers 382.9 km², and medium potential zone covers 169.72 km².

存在于地下的水被认为是珍贵的水源。本研究涉及印度南部泰米尔纳德邦蒂鲁内尔维利·塔卢克（Tirunelveli Taluk）地下水潜力区的划分。研究区域位于东经77°32′16″至77°48′8″ E和北纬8°40′12″至8°56′34″ N之间，面积558.42 km ²。Tirunelveli Taluk的地下水潜力区由以下几层来推断，即地质，地貌，线质密度，排水密度，降雨，坡度，土壤和土地利用/土地覆盖。在GIS环境中，这些图层已通过空间数据源（如SOI地形图，GSI地质图，LANDSAT 8卫星图像，SRTM DEM，泰米尔纳德邦农业部每日降雨量数据和可用的现有地图）以1：50,000的比例进行了数字化。要素层次的权重和每个要素类的排名来自AHP技术的成对比较技术。根据图层要素类对地下水可利用性的影响，对准备好的专题图进行重新分类。最后，使用加权叠加工具叠加重分类的图层，以准备地下水前景图。研究区域的^2个被确定为地下水潜力很高。高电位区域覆盖382.9公里²，和中势带盖子169.72公里²。