Limnological study of Karoon River (Gotevand to Band-e-Ghir)

Because of the importance of Karoon river and its potential in fisheries, the project was carried out during one year period from march 1992 to march 1993. Physico-chemical and biological parameters were studied. We tried to collect general information about the ecosystem, aquatic organisms, physical and chemical changes, variation of living organisms in the superficial layer and bottom of the river. The study was carried out in a part of Karoon river (Gotevand to Band-e-Ghir) in which it is divided into two branches Shoteit and Gargar. This study was carried out in the land area of 205 km. Physico-chemical factors of water were: average annual transparency 20.43 cm, water temp. 21.7ºC, dissolved oxygen 9.29 mg/lit, pH 8.17 and salinity 0.404 ppt. The river hasn't any NH3, SH2 and CO2 gases, The highest frequency of phytoplankton has been observed in mid-summer and early autumn, and among them Bacillariophyceae being dominant. In general, amount of zooplanktons were lower than phyto.....