Volume No. 6 Issue No.: 1 Page No.: 41-50 July-Sept 2011

 

HYDRO-GEOCHEMICAL CHARACTERIZATION OF GROUNDWATER OF NAGAON DISTRICT OF ASSAM, INDIA

 

M. M. Saikia*1 and H. P. Sarma2

1. Department of Chemistry, Dhing College, Nagaon, Assam (INDIA)
2. Department of Environmental Science, Gauhati University, Assam (INDIA)

 

Received on : May 03, 2011

 

ABSTRACT

 

Hydrogeochemical studies were carried out in Nagaon district of Assam to identify and delineate the important geochemical processes which were responsible for the evolution of chemical composition of groundwater. The major cationic dominance pattern, is in the decreasing order of Ca> Mg> Na> K, Ca> Na> Mg> K, Na> Ca> Mg> K, Na> Mg> Ca> K, Mg> Ca> Na> K and Mg> Na> Ca> K respectively and the anionic concentration indicates that the majority of groundwater samples belongs to HCO3> Cl> SO4> NO3 -type. The modified Piper diagram reflects that the water belongs to Ca2+ -Mg2+-HCO3, Na+-HCO3 and Ca2+-Mg2+-Cl- -facies. The interpretation of plots for different major ions and molar ratios suggest that carbonate and silicate weathering controlled the hydrochemistry of the aquifer.

 

Keywords : Ground water, Nagaon district, Hydrochemistry, Water-rock interaction, Geochemical process

 

 

BACK