Behaviour of boron, calcium and magnesium in Purna and Auranga estuaries (Gujarat), west coast of India

Abstract

Ratios of B:Cl, Ca:Cl and Mg:Cl were generally within limit of river water at one end and seawater at the other. Percentage addition or removal (PA & PR) of B, Ca and Mg was calculated using the concept of the theoretical dilution line. High percentage of removal of B at low chlorinities indicated its rapid removal in the initial encounter of river water with seawater. On the contrary, Ca was preferentially added at low chlorinities. Addition decreased as the chlorinity increased and removal was observed near to seawater chlorinity. Mg was more conservative when compared to B and Ca