Land forms and geomorphological features in the lalgudi taluk, Tiruchirappalli District in Tamilnadu - using spatial technologies

Water is renewable resource occurs in three forms viz, Liquid, solid, vapor (gaseous), all these tree forms of water are extremely useful to man. No life can exist without water. Since, water is an essential for life as like that of air, it has been estimated that in the human body two-third portion is constituted by water. The water is not only essential for survival of human beings, but also for animals, plants and other living beings. The present study is attempted to identify the groundwater potential zones using remote sensing and GIS techniques. Using sequential by preparing of thematic maps like geomorphology, Stratigraphy, Transport, Drainage, lithology and soil map and managing these GIS layers in Geo-database and assigning weightages based on the correlative factors that appear to be important in holding / processing of recharge of water and ground water potential content. By integration of weightages to acquire more effective score to discriminately demarcate the ground water potential zone in the present land units. The study of soil is added as an important theme/ data since it beholds the infiltration limitation through monsoon precipitation and in granulizing the effect of surface runoff based on their material content. By keeping all these facts a predominant speckle to identify the groundwater potentiality the weightages analysis helped in achieving the goal by the basic hydrological knowledge, through field exploration and GIS capabilities. This study helped to delineate the potentiality as moderate potential, and some part have been classified as high potential zones, low and very low potential zones and only few areas have been classified as very high groundwater potential zones.