| || Salinity and Toxicological Studies of Waters of Rajasthan Desert
Author : Bhutra, Mankanwar ;Rai, Sushila;Ghosh, P.K.;Tak, T.C.;Bhati, O.P.;Bhargava, T.N.;Gopal, R.
Source : Defence Science Journal ; Vol:31(2) ; 1981 ; pp 105-108
Subject : 579 MicroBiology
Keywords : Sulphate reducing bateria ;Guinea worm;Dissolved solids;Fluorosis;Water borne diseases
Abstract : Detailed studies on quality of ground waters of Western Rajasthan have been carried out by analysing about 1500 water samples for presence of total dissolved solids (TDS) and other normal chemical constituents. 109 ground water samples were tested for presence of 8 toxic substances viz. As, Ba, Cd, Cr/sup +6/, Pb, Se, Ag, and CN and F and NO/sub 3/. About 9 percent of the waters conform to the normal standards of drinking water i.e. contain less than 500 mg/l TDS. None of the water points has been found to be contaminated with toxic substances. However, fluoride and nitrate were present in all the samples. A survey of water-borne diseases, kidney diseases and fluorosis carried out to establish the possible correlation between prevailing diseases and dissolved solids in waters indicate that 82 percent of the reported cases are due to water-borne diseases. The guinea-worm (Dracunculus medinensis) has been found in the surface waters and sulphate reducing bacteria (Desulphovibrio desulphuricans) in the brackish water.
| || Appraisal of the Quality of Ground Waters in the Arid Zone of Rajasthan and Kutch
Author : Bhargava, T.N. ;Gopal, R.
Source : Defence Science Journal ; Vol:31(1) ; 1981 ; pp 73-86
Subject : 556 Hydrology
Keywords : Classification of waters ;Water borne diseases;Brackish water;Salinity and toxicological studies
Abstract : A survey and analyses of waters of arid zones of Western Rajasthan and Kutch have been presented. The data on physico-chemical characteristics of about 2000 ground water samples indicate that according to International Standards of drinking water as devised by WHO, 9 per cent waters in Rajasthan and 19 per cent in Kutch conform to permissible limits (TDS < 500 mg/l) and are suitable for drinking. Considering 2000 mg/l TDS, as maximum permissible level, 46 per cent of available waters in Western Rajasthan and 71 per cent in Kutch are potable. 38 and 57 per cent of waters have electrical conductivity less than 2250 micromhos/cm in Rajasthan and Kutch respectively. Salinity and toxicological studies of brackish waters and their remedial measures are also discussed. A tentative correlation between prevailing water-borne diseases, kidney diseases and fluorosis and dissolved solids in waters of Western Rajasthan has also been shown. The waters have been classified into various suitability classes depending upon their composition.