Volume No. 7 Issue No.: 1 Page No.: 10-23 July-September, 2012

 

evaluation of groundwater pollution of sangamner area, ahmednagar district, maharashtra, india

 

Deshmukh K.K.

Sangamner Nagarpalika Arts, D.J. Malpani Commerce and B.N. Sarda Science College, Sangamner, Ahmednagar, Maharashtra (India)

 

Received on : April 05,2012

 

ABSTRACT

 

Sangamner is located in the Northern part of Ahmednagar district of Maharashtra, India. Several dams and weirs were constructed on Pravara river which drains Sangamner area. Due to overuse of irrigation water and chemical fertilizers coupled with increase in agro-based industries has started deteriorating the soil and water resources. In the present study attempt was made to evaluate groundwater pollution by analyzing 68 groundwater samples collected covering the entire study area during pre - monsoon and post – monsoon. All the samples were analyzed for pH, EC, TDS, Na+, K+, Ca2+, Mg3+, Cl, HCO3, SO43–, NO3, PO43– silica and boron. pH is alkaline and slightly higher in summer June 2009 than winter Decembar 2008. Higher EC values are observed in the low lying alluvial part of the Pravara basin, which is due to higher residence time, sluggish groundwater movement and intensive water – rock interactions in alluvial aquifer. Brief review of temporal variations of cationic and anionic parameters of groundwater was taken. Higher boron and nitrate content was observed in the irrigated agriculture. Suitability of groundwater for irrigation was evaluated based on Sodium Adsorption Ratio (SAR), Soluble Sodium Percentage (SSP), Residual Sodium Carbonate (RSC), Kelly’s Ratio (KR) and Permeability index (PI). U.S. Salinity Laboratory’s diagram suggesting that majority of the samples of groundwater from study area lies in C4S1, C4S2 and C4S3 categories satisfactory for salt tolerant crops on soils of good permeability with special leaching. The study would be useful in educating farmers, creating awareness among the local people about groundwater pollution and preventing further degradation of groundwater resources in the area.

 

Keywords : Overuse of irrigation, Temporal variations, Sodium adsorption ratio, Soluble sodium percentage, Residual sodium carbonate, USSL diagram

 

 

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