摘要
为探究城市景观湖泊水质特征,以昆明翠湖为研究对象对该区域的水体进行景观水体水质分析和评价。根据2022年1月至12月水温、pH值、DO、I_(Mn)、COD_(Cr)、BOD_(5)、NH_(3)-N、TP、TN等浓度监测值,运用综合污染指数法、综合营养状态指数法评价翠湖水质状况,计算水质监测因子的分担率,确定关键污染因子。翠湖水体总体为中度富营养化,总氮为首要污染因子,磷监测指标为影响藻类生长的主要限制性因子。氨氮、总氮以及总磷等监测指标浓度的年季特征呈现秋冬季高于春夏季,化学需氧量与高锰酸盐指数监测指标浓度年季特征呈现春夏季高于秋冬季,pH、溶解氧、五日生化需氧量年季特征变化不显著。
To investigate the water quality characteristics of urban landscape lakes,this study conducted a landscape water body quality analysis and evaluation of the water in the Green Lake area of Kunming.Based on monitoring data from January to December 2022 for water temperature,pH,dissolved oxygen(DO),permanganate index(I_(Mn)),chemical oxygen demand(COD_(Cr)),biochemical oxygen demand(BOD_(5)),ammonia nitrogen(NH_(3)-N),total phosphorus(TP),and total nitrogen(TN),the water quality status of Green Lake was evaluated using the integrated pollution index method and the integrated nutrient status index method.The contribution rates of water quality monitoring factors were calculated to identify key pollutants.Green Lake exhibits moderate eutrophication in general terms,with total nitrogen as the primary pollutant and phosphorus as the main limiting factor affecting algal growth.Concentrations of monitored indicators such as ammonia nitrogen,total nitrogen,and total phosphorus exhibit seasonal patterns with higher values in autumn and winter,as compared to spring and summer.Conversely,concentrations of chemical oxygen demand(COD)and permanganate index show higher values,in spring and summer than those in autumn and winter.Seasonal variations in pH,dissolved oxygen,and five-day biochemical oxygen demand(BOD 5)are not significant.
作者
高学宇
凡勇
许建萍
GAO Xueyu;FAN Yong;XU Jianping(Eco-Environmental Monitoring Station Wuhua Branch Kunming Bureau of Ecology and Environmental Protection,Kunming 650031,China)
出处
《环保科技》
2025年第5期45-50,共6页
Environmental Protection and Technology
关键词
城市景观水体
水体监测
水质特征
urban landscape water
water monitoring
water quality characteristics
