Abstract
The population of Ephemeroptera was studied in three selected stations of Rawanduz River (Gali Ali Beg water fall, Rawanduz River and after the junction of these 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 Council of Ministers of the Environment Water Quality Index (CCME WQI). Eleven species of aquatic insects were identified,which belong to four families of the order Ephemeroptera. Three of the studied species are described for the first time. According to water quality index, the water was ranked as poor for drinking and marginal for irrigation purposes.
Highlights
Rivers are the human's most important freshwater resources
Several researches used the Canadian Water Quality Index to assess the quality of local water [3,4,5,6,7,8]
This study aimed to evaluate water quality of Rawanduz River for drinking and irrigation purposes by using the Canadian water quality index CCME WQI as well as surveyingthe community of benthic insect, those of the order Ephemeroptera
Summary
Rivers are the human's most important freshwater resources. Social, economic and political development has been largely linked to the availability and distribution of freshwater in river systems.River systems can be considered as the arteries of the land that supply life and give water to an abundance of organisms [1].Referring to the quality of water required for human use (i.e. drinking, agricultural and industrial purp oses), the term water quality was used. Rivers are the human's most important freshwater resources. Economic and political development has been largely linked to the availability and distribution of freshwater in river systems. River systems can be considered as the arteries of the land that supply life and give water to an abundance of organisms [1]. Referring to the quality of water required for human use (i.e. drinking, agricultural and industrial purp oses), the term water quality was used. This term is completely human for all aquatic organisms or ecosystems [2]. Water quality is important to preserve human health and the health of the ecosystem
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