부산대학교 도서관

Groundwater resources in special have been applied for drinking water use versus surface water in Iran. However, this groundwater withdrawal has not been monitored for its level and quality. The present study aimed at determining the qualitative changes of Hamedan groundwater resources using the Kriging and analysis of quality assurance approach. To investigate the spatial variations of water quality in Hamedan, the following physical parameters were taken into consideration: total dissolved solid and electrical conductivity; chemical agents including calcium, magnesium, sodium adsorption ratio, iron, fluoride, sulfate, nitrate, phosphate; residual concentrations of pesticides in drinking water, including organochlorine (difenoconazole and permethrin), organophosphate (chlorpyrifos, diazinon, and malathion), and pyrethroids (fenvalerate); and heavy metals including cadmium, lead, arsenic, mercury, chromium, copper, and zinc. The geographic information system (ArcGIS10.4) was used to draw the isopotential maps of the resources. Schuler, Piper, and Durov diagrams as well as AqQA software were used to determine the water quality. According to Shuler's diagram, samples of drinking water in Hamedan vary from moderate to good in terms of quality. The concentration of physicochemical parameters in the north, northwest, and northeast of Hamedan was higher than the World Health Organization (WHO) guidelines. The residual concentrations of pesticides, arsenic, mercury, chromium, and cadmium were lower than the WHO guidelines. However, the concentrations of copper and zinc in northern Hamedan were higher than the guidelines. According to the geological map of the plains of Hamedan, it can be concluded that the source rock mainly consists of dolomite and igneous rock is made of alkaline‐basaltic feldspar. Variations in the chemical composition of drinking water in Hamedan depend on the amount of precipitation, soil, water harvesting, excessive use of fertilizers and human activities. [ABSTRACT FROM AUTHOR]