Volume No. 9 Issue No.: 2 Page No.: 298-305 October-December 201

 

GROUNDWATER QUALITY OF PRAVARA SUB BASIN, AHMEDNAGAR, MAHARASHTRA, INDIA

 

Kulkarni P.S. *, Malik M.A. 1 and Masoom S.M. 2

1. Department of Geology, Maulana Azad College, Dr. Rafiq Zakaria Campus, Aurangabad, Maharashtra (INDIA) 2. Department of Geology, Godavari Khore Irrigation, Aurangabad, Maharashtra (INDIA)

 

Received on : July 10, 2014

 

ABSTRACT

 

Paravara Sub basin is a part of Ahmednagar district Maharashtra, India comprising Deccan lava flows composed of basaltic rocks. The Sub basin comprises 16 watersheds covering an area of 3506 sq. km. In the present research work the groundwater quality assessment of drinking water supply wells of all the 18 watersheds has been undertaken. The results obtained through chemical analyses for the assessment of water quality are TDS (mg/L) in all the watersheds except GV110,118 and 123 is within tolerable limit. In GV110,118 and 123 watersheds, it is more than 2000 mg/L hence preventive measures are necessary to be undertaken. In all watersheds pH is ranging between 7.4 and 8, which is found to be alkaline and within tolerable limit but above permissible limit. Hardness in watersheds Nos. GV 110,118,119 and 123 is more than 600 mg/L indicating above tolerance limit. Magnesium content in watershed No. GV 123 is as high as 151 mg/L which is exceptionally high and require further treatment to reduce the percentage of magnesium. Sulphate in most of the watersheds is traced up to 530 mg/L. Such an anomaly is attributed to excessive use of fertilizers and pesticides. It is generally observed that the values of the parameters have crossed the permissible limit and the ground water quality is getting deteriorated due to overuse of chemical fertilizers. The groundwater quality in most of the area is not advisable for drinking purposes. Hence, the domestic water supply dependent on groundwater source will be minimized in future and the use of surface water supply for drinking purposes is the need of the hour.

 

Keywords : Groundwater quality, Pravara Sub basin, pH , Watershed, Chemical pesticides, Chemical fertilizers

 

 

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