Water quality assessment of Rawanduz River and Gali Ali Beg stream by applied CCME WQI with survey aquatic insects (Ephemeroptera)

Abstract

The population of Ephemeroptera was studied in three selected stations ofRawanduz River (Gali Ali Beg water fall, Rawanduz River and after the junction ofthese two waters) during the three seasons of spring, summer and autumn in 2016.In addition,sixteen physicochemical parameters (pH, EC, turbidity, DO, BOD5,NO3, TDN, TDP, HCO3-, Hardness, Ca2+, Mg2+, Na+, K+, Cl-, SO42-, Na% and SAR)of water in these stations were estimated and used to calculate the Canadian Councilof Ministers of the Environment Water Quality Index (CCME WQI). Elevenspecies of aquatic insects were identified,which belong to four families of the orderEphemeroptera. Three of the studied species are described for the first time.According to water quality index, the water was ranked as poor for drinking andmarginal for irrigation purposes.