Monitoring the chemical quality (Potassium, Calcium, Chloride, Electrical Conductivity) of drinking water in Chalderan, West Azerbaijan province, Iran, during 2003-2013

Background and Aim: Analysis, monitoring and control of water quality, including water and sanitation and health care are the duties of companies. The aim of this study was to evaluate the changes in the physicochemical quality of groundwater watershed in Chalderan during a ten-year period (2003-2013). Materials and Methods: The results of water physicochemical parameters analysis were obtained from the regional water authority. The annual average of parameters were determined using descriptive statistics in SPSS Ver.21 by applying Friedman Test and measure with significant level alpha=0.05. The annual parameters changes were compared and zoning of different parameters for groundwater quality of Chalderan watershed was determined through ArcGIS9.3 software. Results: The results showed that physicochemical parameters had an increasing trend during the first five years while in the next five years despite annual fluctuations a decreasing trend was observed. No significant correlation was found in annual variation of potassium, calcium, chloride, and conductivity (P =0.05). Geographically, density and high concentration of chemical compounds in groundwater was seen more in north west, west and south west areas. The most increases of cation and anion concentrations were observed between 2007-2010. Conclusion: The results showed that most of the groundwater watershed contained Conductivity, and the changes in chemical composition of groundwater watershed depended on rain fall, water harvesting, and type of soil.

کلیدواژه ها:

Water quality ، Geographic zoning ، Chalderan ، Iran