Limnological Study in Upstream and Downstream Degala Basin Water Body within Erbil City-Iraq

Abstract

The Degala Basin is one of the water reservoirs in the heart of the Degala sub-district, roughly 50 kilometers east of Erbil City. Samples were collected monthly from different sites of Degala Basin during October 2020 to August 2021 to determine physicochemical and biological properties EC, TDS, Chloride, Na, K, Ca hardness, total alkalinity, nitrate, and DO, pH, total hardness, Mg hardness, and Sulfate. The statistical analysis of the data revealed that there were significant differences in physico-chemical parameters between the two sites, with high significant relationships for (EC, TDS, chloride, Na, K, Ca hardness, total alkalinity, nitrate, and DO) and low significant relationships for (pH, total hardness, Mg hardness, and Sulfate) at the (p ≤ 0.05) for all parameters studied different algal species obtained from all sampling sites in Degala basin revealed the presence of a variety of algal species. There is small change in the pH value during the observation period among upstream, basin and downstream. Different genera of algae found in Degala basin.