Abstract
The paper discusses the result of systematic measurement of activity concentration of radon in ground water and surface water samples of two major rivers of coastal Karnataka, namely, Kali and Sharavathi. Water radon concentrations were measured using an Alpha Guard PQ2000Pro (Genitron GmbH) equipped with an appropriate unit (Aquakit), following a protocol proposed by the manufacturer. 222Rn concentration in bore well water was found to vary in the range of 0.91 – 15.86 Bq l - 1 , for open well water the 222Rn concentration was found to vary in the range of 0.33 – 9.70 Bq l - 1 in the catchment areas of Kali river. The 222Rn concentration was found to vary in the range of 1.07 – 10.72 Bq l - 1 and 2.01 – 10.02 Bq l - 1 for bore well and open well, respectively, in the catchment areas of Sharavathi river. In the surface water of Kali river the 222Rn concentration was found to vary in the range of 0.16 – 1.79 Bq l - 1 and for surface water of Sharavathi 222Rn concentration was found to vary in the range of 1.19 – 9.92 Bq l - 1 , respectively.
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