Continuous Monitoring of Salinity Structures and Coastal Environmental Study Using 2D –ERI in Vellappatti Beach, Thoothukudi, Tamilnadu

A. Antony Ravindran,* #N. Ramanujam And D. Juliya Damaris*

Department of Geology, Manonmaniam Sundaranar University, V.O.Chidamabaram College, Thoothukudi, 628002 (India)

 ^# Department of Coastal Disaster Management, Pondicherry University, Andaman (India)

Corresponding Author Email:antonicogeo@gmail.com   

Accepted 22 May, 2012

Abstract

The aim of  the study was to  asses the sea water intrusion  in  Vellappatti  Beach  .  The Continuous monitoring of seawater intrusions study using 2D ERI with Wenner array was conducted within the shoreline. The objective of the survey is to detect the seawater intrusion and beach morphodynamic changes in the study area. The study area are contains with sand, sand dunes, Shell fragments, wave and tide, clay deposits. The survey conducted using the equipment of imaging system and interpretation with help of Res2Dinv software. The interpretation of the resistivity data along the profiles shows different model of resistivity variation in sea water intrusions in the study area. The deformation in the layer continuity and direct contact between high resistivity (sand dunes or sand formation) and low resistivity (sea water intrusion) layers can appear in the study area. This interpretation is used  for resistivity difference  between  hydrological  salinity  and  geological  structure  of  the  study  area.  The  salinity a structure is mainly depends upon the mophodynamic of the beaches. The vertical and horizontal movements of the saltwater intrusion are determined through continuous monitoring of the 2-D Electrical resistivity imaging technique in the study area used for feature environmental application for freshwater pollution in the study area.

Keywords:  Resistivity, 2D ERI, Vellappatti, Seawater intrusion, Environmental Impact