The present study was aimed in finding geomorphological impacts on the groundwater quality along the Bay of Bengal of north coastal districts of Andhra Pradesh, India.
Groundwater samples were collected and assessed to identity various geomorphological impacts on the quality of groundwater along the coast. Groundwater samples along the coast of north coastal districts of Bay of Bengal of Andhra Pradesh were collected for two seasons in April and November of 2015. 66 groundwater samples of bore and open wells along the coast for two seasons (Pre and Post Monsoon) were systematically analyzed for their physio-chemical parameters. The results were interpreted for various geochemical assessments with correlative approach for finding the impacts on the groundwater quality.
The correlated statistical analysis showed that there are deviations in some parameters from the prescribed WHO and ISI standards of potable water. Some parameters were found relatively high in the Post Monsoon season than in the Pre Monsoon. The mechanisms controlling the groundwater chemistry can be attributed to the rock weathering. The geochemical evolution of the zones indicates that there was much movement in the groundwater under the influence of the local topography and thus at times favoring the development of intrusion zones along the coast. The hydro-geochemical facies with respect to the flow pattern indicate that the groundwater’s due suffer the impacts of the elevated as the study area is topographically a low lying area.
It can be concluded that the groundwater along the Bay of Bengal coast in the north coastal districts of AP, India has been under sever geological and chemical impacts from the local and elevated lands. The recent geomorphological changes that took place along the coast has impacted its quality and the development of intrusion zones is evident.