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Application of GIS in the Investigation of Groundwater Level and Fluctuation in Tiruchirappalli District, Tamil Nadu Palanichamy Alaguraja Post Doctoral Fellow, UGC-Dr. S. Radhakrishnan, Department of Geography, School of Earth and Atmospheric Sciences, Madurai Kamaraj University, Madurai, Tamil Nadu. alagugeo@gmail.com Online published on 14 November, 2017. Abstract Ground water occurs under phreatic to semi confined conditions in the inter-granular pore spaces in sands and sandstones and the bedding planes and thin fractures in shales. In the area underlain by Cretaceous sediments, ground water development is rather poor due to the rugged nature of the terrain and the poor quality of the formation water. Water level fluctuations of the observation wells between two periods over the area indicates the net changes in the ground water regime during the period in response to the recharge and discharge components and it is an important parameter for planning sustainable ground water development. Tiruchchirappalli district, one of the three districts carved out of the composite district of the same name is located in the central part of Tamil Nadu between 100 18’ and 110 25’ north latitudes and 780 08’ and 790 0’ east longitudes. The groundwater data were analysed for their long-term pattern, and were interpreted graphically to understand the dynamics of the groundwater level and. The average water level depths and fluctuation. The spatial variation maps of the same were generated using spline interpolation technique in Arc GIS software. The groundwater level of the study area for both the seasons from 1990 to 2011was interpreted. During the pre monsoon season the groundwater level varied from 4 metres to 12 metres in depth and during the post monsoon season the groundwater level was found to be from 3 metre to 9 meters. Top Keywords Groundwater, Fluctuation, Post and Premonsoon water level and Average. Top | |
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