3.1. Location
The study area (Wellpoint) is situated beside the Bay of Bengal. The longitude and lattitude of the studied area are 92°03’ to 92°12’ and 21°08’ to 21°21’, respectively. It is situated on the last corner of Ukhia Upazila, Cox’s Bazar (Fig. 1). The humidity is very high in this area. Every year (July-September) different disasters attacked this area. Tidal saline water from the sea is another problem in the studied area. The temperature of seasonal variation in winter to summer is considered around 12-42 degrees. The rainy season occurs stay in high time because of the seasonal monsoon every year. Sometimes heavy rainfall is formed seasonal characterization bay of Bengal. In summer, the temperatures are also high (over 42 degrees). The borehole areas was selected to reach the maximum number of water supply without any risk of flooded away during the rainy season and the land was not stored any stagnant water. In the north-western zone, this wellpoint area is one of the most readily available fo the water supply in these areas for agriculture. As this area is the coastal part of Bangladesh therefore, safe groundwater evaluation is the urgent need of this area.