Study of Regulation Lake’s Water Quality of Mosul Dam

After impoundment in the main lake of Mosul dam, water quality for regulation lake have been evaluated in addition to the enumeration of phytoplankton through examination of water samples collected in seven successive months from January to July 2000 to give an idea about water quality. Variation in parameter values were noticed in the studied period and the phytoplanktons were belongs to three divisions Bacillariophyta (60%), chlorophyta (30%) and pyrrophyta (10%). It was noticed also that the values of most studied parameters were higher than the results obtained by previous study carried out on the same lake in (1988). The data of all measured properties were within the limited of water quality criteria for Iraqi systems for water and river conservation (1967).