A nine-year assessment of annual changes in chemical and physical parameters of Karun River’s water
Paper Details
A nine-year assessment of annual changes in chemical and physical parameters of Karun River’s water
Abstract
Rivers are of the major sources of surface waters. The quality of water of these resources depends on different factors, including hydrological, physical, chemical and biological factors. The aim of this project was to study the annual variations of physical and chemical parameters of the water in Karun River for a nine-year period since 2003 to 2011. It was found that in 2010, a large number of factors have had increased concentrations, which cause can be attributed to the drought occurred during this year. Also, among the studied factors, the COD factor has had the most changes during different years, so that from the concentration of 6.7 mg/l in 2003 has reached to 12.4 mg/l in 2011. Instead, the CO3– factor has remained without changes and at about zero in all these years. Also, review of pH factor shows that the region water has had basic features in all years of the study. It was found in review of correlations between factors during various years that the EC factor has a significant negative correlation with pH at 5% level as well as a negative correlation with the BOD factor. The TDS factor is negatively correlated with factors of pH and RSC at 99% level. The TH factor has negative correlation with factors of pH, RSC and COD at 1% level. The factors, including H CO3–, Cl–, SO42-, Na+, Ca2+ and Mg2+ are in a same situation. The BOD factor is also negatively correlated with factors of pH, SAR, SSP, RSC and COD.
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