Environmental impact assessment of surface water and groundwater quality due to flood hazard in Adyar River Bank

Abstract

A study was conducted in Metro cities in Chennai handling Water quality problems due to increasing population and improper disposal of solid and liquid wastes. The research work carried out in Adyar River Basin (ARB) this river adjoining from both Chennai and Kanchipuram district, Tamilnadu. The main objective of the present study is to identify the processes controlling the geochemistry of surface water and groundwater due to impact of flood in Adyar River. Surface water and groundwater samples collected from either side of the river were analyzed during post-monsoon and pre-monsoon (2016) adopting the standard methods of (WHO). Dominance of cations are in the following order Ca > Na > Mg > K and anions Cl > HCO3 > SO4 during the study period. The analytical results shows higher concentration of TDS, EC, Na, Cl, which indicate signs of deterioration but in the values of pH, Ca and Mg, are within permissible limit as per standards. To understand the geochemical processes piper and gibbs plot has used for the study. Rock water interaction and anthropogenic processes were the major processes controlling groundwater chemistry in this area.