Water environment of Shahu's sewage outlet in Wuhan

Based on researches of domestic and international relevant lakes,we did the experiments of Shahu's sewage outlet.Dependent on Ground water environmental quality standard (GB3838-2002),the quantitative relationship among different water quality index of Shahu and and water eutrophication were analysed.There were some results:(1)The major waste water index of the sewage outlet exceeded standard values,especially NH3-N,TP,CODcr;(2)Observed data of CODcr,BOD5,NH3-N,TN and TP of Shahu were larger than corresponding standard values greatly,some index have already reachedⅤ,or even lower thanⅤ,that did not accord with water qualityⅣof function section of Shahu;(3)There were the significantly positive correlation between TP and chl a;(4) Shahu has already reached middle eutrophication level,and the eutrophication value in dry season is obviously much higher than that in wet season.