• S.Sivakumar

The magnitude of salinity intrusion in coastal areas depend on sensible balance between fresh water flow and saltwater from the sea. The interface between freshwater and saline water is influenced by geology, hydrogeology, ground water heads and groundwater well pumping rates. However, fresh water is plays a key role to counterbalance the salinity intrusion at the upstream water intake. Saline water intrusion is the main problem in the south-eastern zone. This salinity is caused by cyclone and storm surges, high spring tide inundation and capillary actions. It affects the soil surface and root zones. The increase of salinity intrusion and decrease of arability will be prevailing due to climate change effect and reducing of flood plain and it may propagate in all over the country. To quantify that required fresh water, indeed detailed understanding of the physical phenomena is a prerequisite. Ground water data for various major and minor ions over the area for a period of 10 years were collected. The approximate population in the coastal area is 2 million and they are very much vulnerable to the natural disaster along the about 20 km coastal line. The current study aims to demarcate the seawater intruded areas of coastal aquifers located South-east of Chennai, India with the mission of saline water mapping using Arc GIS software

"Vulnerability Assessment of Salinity Intrusion in Coastal Aquifers of Chennai Using Arc GIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 2, page no.205-212, February-2018, Available :http://www.jetir.org/papers/JETIR18MG041.pdf

"Vulnerability Assessment of Salinity Intrusion in Coastal Aquifers of Chennai Using Arc GIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 2, page no. pp205-212, February-2018, Available at : http://www.jetir.org/papers/JETIR18MG041.pdf