WATER QUALITY OF THE SHITOUKOUMEN RESERVOIR

The pattern and contributing factors of water quality of annual and seasonal variation in Shitoukoumen reservoir is discussed based on the continuous water quality monitoring between 1996 and 2000 in Changchun city. The reservoir has been at the phase of medium eutrophication. Affected by extra origin water supply and temperature, the changes of water quality indexes of the reservoir are different seasonally. Most water quality indexes of the reservoir fluctuate yearly. pH and BaP of the reservoir keep constant, while iron and total phosphorus increase gradually.