PRECIPITATION AND ALTITUDE EFFECTS ON GROUNDWATER IRON AND MANGANESE DISTRIBUTION IN CHANDRAPUR DISTRICT, CENTRAL INDIA

Abstract

To ascertain the precipitation and altitude effects on groundwater iron and manganese distribution in Chandrapur district, central India 36 groundwater sampling locations by stratified sampling methodology were identified. Water sampling was carried out by grab sampling methodology and heavy metals concentrations were analyzed by acid digestion method with the help of ICP-OES. The results revealed precipitation affects the distribution of groundwater iron and 1601-1700 mm precipitation range has a maximum effect (n=4 sampling locations have reported an increase in concentration in post-monsoon season). The minimum effect was observed in the precipitation range of 1801-1917 mm (n=1 sampling location has reported an increase in concentration). In the case of groundwater manganese, a similar trend as of groundwater iron was recorded. The distribution of iron and manganese concerning altitude has maximum sampling locations (n=25) in the medium attitude range (198-242 m asl). The average iron and manganese concentration concerning altitude is in the order of high > low > medium and medium > low > high respectively. It can be concluded that precipitation and altitude affect the distribution of groundwater iron and manganese from the study area. The plausible reasons for this perhaps may be the dissolution of these heavy metals in groundwater and their distribution in the earth crust at various altitudes. Inhabitants from these types of precipitation and altitude ranges should use groundwater cautiously if the presence of iron and manganese is reported from the groundwater samples.

Key Words: Altitude, Central India, Chandrapur, Iron, Manganese, Precipitation

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