Study of Andimeshk's Drinking Water Resources in Iran

Abstract

This study was conducted to evaluate the application of different indices for the quality evaluation of eight groundwater resources of Andimeshk city on three months. Six corrosion indices of Langelier saturation index, Ryznar (saturation) index, calcium carbonate precipitation potential, Puckorius scaling index, Aggressiveness index and Larson-Skold corrosive index, were determined. Most of these resources had a high amounts of sulfate and affected the Laurence corrosion index, however were not exceeded the WHO standards. In the view of Larson-Skold corrosive index these water resources are corrosive for water facilities affected by chloride and sulphate, such as mild steel facilities. This index caused different results among other indices. From other indices, Ryznar (saturation) index and Puckorius scaling index indices showed different results among other indices and while other indices defined some resources as a non-corrosive, Ryznar (saturation) index and Puckorius scaling index predicted as a corrosive. In just one of the water resources, all the six indices had same results (moderately corrosive). Application of one index may not be able to predict water corrosivity, some factors such as water quality and water installation material should be regarded too. Some of those resources had high amounts of nitrate and phosphate which were contaminated by agricultural and domestic wastewaters.