HYDROCHEMICAL PROVINCE OF INDIA

This has been classified on the basis of geo-chemical character and chemical composition of water influenced by Physiographic, Orographic, Geological and Climatologically conditions. Ground water occurring in sedimentary rocks of India has been divided into three major hydrogeochemical provinces namely Bicarbonates, Bicarbonate chloride and chloride

Bicarbonate Province

In this province ground water is characterized by high percentage of HCO3 ion generally exceeding 90% of the total ions. The ration of alkaline earth to Na is above 2. EC value 75 micro mho/cm.

Bicarbonate – Chloride Province

In this province HCO3- is dominant ion. The Cl- and Na, also become significant. The ration of Alkaline earth to Na+ falls below 1 and EC value reaching about 1500 micro mhos/cm.

Chloride Province

Chloride is dominant in this province and concentration of the Cl exceeds 50% of the total anions and exceeding of Na over alkaline earth Metal ions. EC value exceeds 1500 micro mho/cm.