Indian Journal of Science and Technology
DOI: 10.17485/ijst/2008/v1i7.7
Year: 2008, Volume: 1, Issue: 7, Pages: 1-7
Original Article
V. Lenin Kalyana Sundaram*1 , G.Dinesh2 , G.Ravikumar3 and D.Govindarajalu4
1Centre for Water Resources, CEG, Anna University, Chennai – 600 025, India.
2Department of Ocean Engineering, Indian Institute of Technology, Chennai – 600 036.
3Department of Chemical Engineering, A.C.Tech, Anna University, Chennai – 600 025.
4Department of Civil Engineering, Pondicherry Engineering College, Pondicherry – 605 014.
*Author for the correspondence:
V. Lenin Kalyana Sundaram
Centre for Water Resources, CEG,
Anna University, Chennai – 600 025, India.
E-mail: [email protected]
An Indicator based model is described to assess and quantify the significance of vulnerability to seawater intrusion due to excessive ground water withdrawals: also to analyze the impact of artificial recharge in minimizing the seawater intrusion for coastal aquifers. Thematic maps of factors influencing the seawater intrusion and artificial recharge were prepared and overlaid using Geographical Information System (GIS). Based on GALDIT Index, the aquifer vulnerability index mapping was carried out. The distributions of the vulnerability areas for good, moderate and poor class are 32%, 45% and 23% respectively. These maps can be used as a tool for management of the coastal ground water resources. Further, the vulnerable areas are reclassified into two zones: good and poor potential areas (recharge zones). The influence of artificial recharge in pushing the freshwater-seawater interface towards the sea was simulated. For different options of surface water availability and artificial recharge, the possibility of remedial measures of seawater intrusion is estimated.
Keywords: Aquifer vulnerability mapping, Sea water intrusion, GALDIT Index, Artificial recharge, GIS, Overlay
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