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Abstract:
The physical and chemical characteristics of karst springs are not a sole function of flow path in the carbonatic rock mass. A number of other parameters, including the type of precipitation, soil cover morphology of the exposed area, and the hydrochemistry of the infiltrating water into the karst system also have their own contribution. In the present study, the Car and Barm-Firooz mountains me chosen to determine some of the governing factors of the physical and hydrochemical characteristics of karst springs. The following measurements were carried out: 1. Concentration of major ions and electrical conductivity of the fresh snow and snowpack. 2. Variation of discharge as a function of time at six sicking streams. 3. Time Variation of discharge, electrical conductivity, and air and water temperature of sinking streams at seven sinkholes. 4. Electrical conductivity and temperature of water at the surface and 40 cm beneath the soil cover. 5. Discharge, major ions, temperature and electrical conductivity of the Sheshpeer spring water were measured every twenty days for a period of three years. The results indicate that if the physical and chemical characteristics of a karst spring are going to be used to determine the characteristics of corresponding aquifer, first the effect of external factors on the outflow should be accounted for, and then the characteristics of the karst aquifer be determined