جستجوی مقالات مرتبط با کلیدواژه « Hydrochemical evolution » در نشریات گروه « آب و خاک »

The Halilrood River is the most important river in the Kerman province and plays an important role in supplying the water needs. Thus, the study of this river quality has a particular importance. This study investigates the hydrochemical evolution of surface waters in Halilrood river basin using chemical analysis of water samples in 12 hydrometric stations. The commonly used hydrochemical methods and statistical techniques were used to this aim. Hydrochemical diagrams such as Piper diagram and series plots were used to evaluate the water quality changes along the river course. The PHREEQC code was used to investigate the interaction between the rocks, sediments and river water. The saturation indexes were calculated for the most important dissolved minerals in river water. Also, the multivariate statistical techniques such as cluster analysis and factor analysis were used to determine factors affecting river water quality. The results of this study show that the total dissolved solids in the river water increases from the highlands to the plains (Due to the dissolution of the rocks and sediments in the river course). Based on the results of this study, the dissolution of rocks and sediments in river water, precipitation and surface evaporation are the most important factors affecting the surface waters quality in the study area.

In recent years, the new methods for assessment of groundwater resources quality have been developed extensively. In this research, the application of Entropy Theory to evaluate groundwater quality for drinking purposes is shown. In rural regions, the groundwater resources are the main source of drinking water. Also, the source of drinking water in Sarab plain is groundwater resources. The Entropy method was used, in order to prevent the individual judgments on determination weight of the parameters used in Water Quality Index Method. In this study, for evaluating Sarab Plain groundwater quality for drinking purposes through entropy weighted method, 12 groundwater parameters affecting the quality of drinking water, including bicarbonate, sulphate, chloride, calcium, magnesium, sodium, potassium, lithium, fluoride, nitrate, sillies and electrical conductivity, were used. Results showed that chloride had the highest impact on water quality of Sarab plain aquifers. Potassium, sodium and nitrate are the most unstable parameters among the studied parameters. The results showed 53 and 18 percent of groundwater samples were classified in group one and two respectively.