摘要
本文研究了东江水库建库3年后的水质变化,结果表明水质属中性偏碱,抗酸化能力弱的类型,符合《地面Ⅱ级水标准》,水体中绝大部份重金属元素,有机污染物都有不同程度的超标,As、Hg、Cu、Pb、酚和总磷的高含量是造成水体严重污染的最关健因素,重金属元素有较大的季节变化,并且在不同采样点之间分布很不均匀,预示着重金属元素在水体中传播有一定的困难,相比之下,有机污染物在全库区分布较均匀。
Through the detailed researches on water quality changes of Dongjiang Reservoir which was set up 3 years ago,this paper draws out these results:the water body belongs to natural but a little alikai,and is very weak to acidification.From the overall view,it can be classified to The Grade Ⅱ of Surface Water.Most of the heavy metal elements and organic pollutants in the water body surpassed,in different degree,the Government Standards.The high contents in As,Hg,Cu,Pb,Phenol and total P is the key reason of polluting the water body.There are greater changes of heavy metal contents in various seasons and sites,which infers the trans- portation difficulty of these elements in water body.However,the organic pollutants distribute very evenly in the reservoir.
