宝鸡市城市河道人工水面水质现状调查及评价

Survey and Evaluation of Quality of Artificial Surface Water in Baoji Urban Reach

以渭河宝鸡市城市河道典型人工水面(金渭湖、石鼓山1号橡胶坝蓄水区)为例,对其水质指标氮、磷、COD进行监测,并采用算术平均法对各断面水质进行了评价。结果表明:人工水面水质在监测期间,4月初达Ⅳ类,甚至超过Ⅴ类水质指标,11月初和6月初部分断面可达到Ⅲ类水质,蓄水时间对人工水面水质影响作用较大;主干流河道水受污染程度较支流轻,应加强支流水质监测及周边污染源排放口的控制与管理;湿地水生植物对氮、磷、有机污染消减作用明显。

The levels of nitrogen,phosphorus and COD in the typical artificial surface water（Jinwei Lake,Shigushan No.1 rubber dam） in Baoji urban reach were monitored,and the water quality was evaluated by using arithmetic average method.The results showed that the water quality of each section reached grade Ⅳ or even exceeded grade Ⅴ in early April;while the water quality of some sections reached grade Ⅲ in early November and early June,which indicated that the water storage time had great influence on the artificial surface water quality.The water of the main stream river was more lightly polluted than that of the branch river,so we should strengthen the monitoring of water quality of the branch river,as well as the control and management of its surrounding pollution sources.The aquatic plants in wetland had significant attenuation effect on nitrogen,phosphorus and COD pollution.