A status investigation of water quality and eutrophication in Jingbo Lake

An investigation of water quality and eutrophication in Jingbo Lake was conducted once a month from April to July of 2007 in the Jingbo Lake.Water transparency,COD,total nitrogen(TN) and total phosphorus(TP) were measured,and the water quality was analyzed and divided into five categories according to surface water environmental functions and the protection targets.It was shown that water transparency was lower,COD was higher,and the pH value was lower than 7,which caused the lake to be slightly acidic.TN and TP values reached higher levels.The content of TN significantly exceeded the standards.The water quality of Jingbo Lake was category Ⅴ.The lake had a rather poor water quality and was in a state of serious eutrophication.