摘要
基于2007—2021年望虞河流域的每月巡测水质数据和2个水利枢纽调水数据,以及2021年沿望虞河布设的13个采样点数据,分析望虞河—贡湖在引江济太工程下的水质时空变化特征并计算望虞河出入湖磷通量。结果表明,长江来水除TN外可达到Ⅲ类水标准,西岸支流恶化望虞河水质,使得沿程水质变化特征复杂并抬升入湖污染负荷。2007—2021年引江济太调水期间,望虞河入湖的COD_(Mn)、TP相较长江来水分别上升40.2%和13.3%,长江来水本身也有导致贡湖水质恶化的风险。同期望虞河引江入湖磷通量累计1306.3 t,净通量237.5 t,对贡湖造成高磷素负荷冲击。
Based on the monthly water quality survey data of Wangyu River basin from^(2)007 to 2021,water transfer data of 2 hydro-junctions in Wangyu River,and the data of 13 sampling sites along the Wangyu River in 2021,the spatial-temporal variation characteristics of water quality of Wangyu River-Gonghu Bay under Yangtze River-Lake Taihu water diversion were analyzed,and the phosphorus flux of Wangyu River-Lake Taihu was calculated.The results showed that except TN,the incoming water from the Yangtze River could reach the class III water standard.However,the infuent from the west bank made the water quality change characteristics complicated and increased the pollution load into Lake Taihu.During the period of water diversion from^(2)007 to 2021,COD_(Mn) and TP from Wangyu River into Lake Taihu increased by 40.2%and 13.3%,respectively,compared with that from Yangtze River.The water from the Yangtze River itself also had the risk of causing the deterioration of the water quality of Gonghu Lake.Meanwhile,the total phosphorus flux from Wangyu River into Lake Taihu was 1306.3 t,and the net flux was 237.5 t,causing a high phosphorus load impact on Gonghu Bay.
作者
陈年浩
陆昊
汪汇
刘彤
钱新
CHEN Nian-hao;LU Hao;WANG Hui(School of Environment,Nanjing University/State Key Laboratory of Pollution Control and Resource Reuse,Nanjing,Jiangsu 210023)
出处
《安徽农业科学》
CAS
2023年第5期56-60,63,共6页
Journal of Anhui Agricultural Sciences
基金
江苏省自然科学基金项目(BK20211155)
国家自然科学基金项目(41907388)。
关键词
水质
变化特征
磷通量
引江济太
望虞河
Water quality
Change characteristics
Phosphorus flux
Yangtze River-Lake Taihu water diversion
Wangyu River
