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Abstract:

Water samples from selected sites in the Buchan area were collected on two different occasions (survey 1 and survey 2) in an preliminary attempt to characterise the samples taken in terms of chemical composition. Chemical constituents such as Ca++, Mg++, and titration alkalinity (as mg/l CaCO3) varied considerably and ranged from 9.0 - 187.0 mg/l, 2.5 - 43.3 mg/l and 27 - 417 mg/l (survey 1) and 3.5 - 188.7 mg/l, 3.5 - 40.0 mg/l and 44 - 424 mg/l (survey 2) respectively. This range in values is attributed to the differing lithology of the sample sites chosen and reflects the geological control on water chemistry of karst landscapes. A computer program for determining equilibrium speciation of aqueous solutions was used to calculate partial pressure of carbon dioxide and saturation indices with respect to calcite and dolomite.