Journal of Applied Geochemists
Year : 2010, Volume : 12, Issue : 2
First page : ( 272) Last page : ( 281)
Print ISSN : 0972-1967.

Hydrogeological studies of Degana block of the Nagaur District, Central part of Rajasthan, India

Vyas Arun

Department of Geology, Govt. Bangur College, Didwana (Nagaur) Rajasthan, India. avyasgeo@yahoo.com

Received:  23  November,  2006; Revised:  31  May,  2010.

Abstract

Rajasthan, the largest state of the country having an area of 3, 42, 239 sq. km is situated in the western part of the country. Due to scarcity of surface water resources, inhabitants are dependent largely on groundwater for drinking and agriculture purposes. The available ground water has impurities like fluoride nitrate, chloride, sulphate and total dissolved solid [T.D.S.] etc. 20% of the fluoride affected villages of the world are in India. Out of 33211 fluoride affected villages in the country, Rajasthan has 16560 villages i.e. > 50%. 30 districts out of 32 districts of the State are facing the fluoride problem. Nagaur district of Rajasthan is one such area where the effects of high fluoride concentration in groundwater are very severe. High fluoride concentration in the district has been causing fluorosis problem. About 64% villages of the Nagaur district are endemic to fluoride related problems. Degana block lies in the central part of the Nagaur district. Groundwater quality vanes widely; it is saline in northern and central parts of Degana blocks. Depth to water varies considerably in the block. High concentration of T.D.S., nitrate and fluoride are major quality problems associated with ground water. High concentration of fluoride is present along the northwest flow direction of groundwater where hydraulic gradient is comparatively low and near the rocks, which are enriched in fluoride contents. Water table depleted due to overexploitation of groundwater resources therefore the area is recommended for adoption of adequate measures for conservation and judicious management of groundwater resources.

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Keywords

Groundwater, Rajasthan, Degana, Aquifers, Fluorosis.

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