红枫湖百花湖水质及浮游植物的变化

Changes of the Water Quality and Phyt oplankton in Hongfeng and Baihua Lake

对红枫湖、百花湖进行综合治理前后的水环境质量进行了调查,对水体的浮游植物的种类组成、季节变化、种群数量以及总氮、总磷、COD、硝态氮、亚硝态氮等指标的变化进行了考察和分析。结果表明,“两湖”治理后,水体的K、Na、Ca、Mg、HCO3-等化学成分含量没有明显的质的变化,总氮、总磷、COD、硝态氮等指标以及浮游植物的种类组成、季节变化、种群数量发生着较大的变化。治理后总氮、总磷、COD、硝态氮、亚硝态氮等含量显著减小,浮游植物的种类增加较大,红枫湖的种类数是治理前的1.72倍,百花湖的种类数是治理前的1.68倍,藻类密度也大幅度地减少。治理后未发现“黑湖”和“水华”现象,说明通过对红枫湖和百花湖的综合治理,改善了水质,继续加大对湖泊的综合治理力度,将有可能使湖泊水体远离富营养化。

The water quality and phytoplankto n of Hongfeng and Baihua Lake were investig ated before and after comprehensive treatment.Changes of water quality index su ch as phytoplankton species makes-up,seasonal variation,population quantity and total nitrogen,total phosphorus,COD,nitrate nitrogen,nitrite nitro gen w ere analyzed.After comprehensive treatment on Hongfeng and Baihua Lake,the con tents of chem ical composition,such as K,Na,Ca,Mg,HCO 3-in Hongfeng and Baihua Lake,had no obvious changes in water bodies,whi le the contents of total nitrogen,to tal phosphorus,COD,nitrate nitrogen and phy toplankton species makes-up,seasonal variati on,population quantities largel y c hanged.After treatment,the conten ts of total nitrogen,total phosphorus, COD and nitrate nitrogen reduced significantly,while phytoplankton species incr eased greatl y,being 1.72times and1.68times of those before treatment in Hongfeng Lake and Baihua Lake,respectively.Alga density also reduced largel y.“Black lake”and“water bloom”phenomena were not observed after co mprehens ive treatment,which indic ated that the water quality was improved through comp rehensive tre atment on Hongfeng and Baihua Lake an d further comprehensive trea tment m ight make lake water body far away from eutrophication.