Assessment of Ground Water, Quality for Drinking Purposes of Jagdishpur Block of Bhagalpur District, Bihar-A Case Study

摘要

Quality of water is an important issue rises in present situation. Increase the demand of the water for drinking and other uses are reduce the quality as well as quantity of ground water due to increase the human population and increase the ground water contamination through natural and anthropogenic sources. Jagdishpur Block of Bhagalpur district which is situated in the Indogangetic plains of Bihar the present study was put forth. Global Positioning System (GPS) based 45 ground water samples were collected from the different areas of Jagdishpur Block of Bhagalpur district (N-25.10'57" E-086.58 '857 "), Bihar, India. The samples were slightly saline (EC 0.63-1.65dS m_l), in nature and alkaline in reaction (pH 7.32-8.67). The cationic elements Ca2+(52.1-151.5mgl-'), Mg2+ (21.7-88.9 mg l_l) were reported to be in excess of the permissible limits and Na+ (3.8-22.9 mg l_l) and K+ (0.50-5.1 mg P1) under the permissible limit. Anionic elements like C1~ (3.25-28.74 mg l_l) under the permissible level whereas C032 (0.0-0.0075 mg l"1), HCO_3 (0.0-0.0366 mg were under the permissible limits and F~ (0.3^.6 mg I"1) was higher in some of the areas. The fluoride content of some of the samples (25 samples) were found higher than the permissible limit (1.5 mg l_l, according to WHO standards) representing the fluoride contamination in the few villages of Jagdishpur Block. Regarding the irrigation water quality, S AR (Sodium adsorption ratio) and RSC (Residual sodium carbonate) value of water were 0.43-2.26 and -229.18 to -101.36 respectively, which are under safe category as per guidelines given by US Soil Salinity Laboratory.