环太湖各水资源分区入出湖总氮负荷与浓度变化  

Variation of inflow and outflow TN loads and concentrations of different water resources zones around Taihu Lake

作　　者：李顺章 李思昊 陈彦彤 余海翔 王昱璋 LI Shunzhang;LI Sihao;CHEN Yantong;YU Haixiang;WANG Yuzhang(Dayu College,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学大禹学院,江苏南京210098

出　　处：《水利水电快报》2023年第4期115-122,共8页Express Water Resources & Hydropower Information

基　　金：国家自然科学基金面上项目(51879069);大学生创新训练基金项目(202110294045);江苏省水利科技项目(2018001)。

摘　　要：为明确环太湖各水资源分区入出湖总氮负荷与浓度的时空变化规律,基于2012~2018年环太湖各水资源分区水质水量监测资料,计算分析了各水资源分区年、季(蓝藻暴发期)尺度入出湖总氮负荷与浓度的年际变化及其负荷贡献率时空变化规律。结果表明:环太湖入湖总氮多年平均浓度明显高于出湖,各水资源分区年、季尺度入出湖总氮浓度的年际变化特征相似,总体而言,湖西区、浙西区、武澄锡虞区年、季尺度入湖总氮浓度明显高于阳澄淀柳区和杭嘉湖区,西太湖出湖高于东太湖出湖,入出湖水质均未出现显著改善。环太湖入湖总氮多年平均负荷远大于出湖,各水资源分区年、季尺度入出湖总氮负荷年际变化规律相似,湖西区、浙西区在环太湖入湖负荷中的贡献排名前两位,在出湖负荷中太浦河的贡献最大,蓝藻暴发期武澄锡虞区入湖总氮负荷对全年的贡献最大,蓝藻暴发期太浦河和望虞河出湖总氮负荷对全年的贡献受丰枯年份变化影响较大。To clarify the spacial-temporal variations of the total nitrogen(TN)loads and concentrations of Taihu Lake,based on the observed water quality and quantity data from 2012 to 2018,the TN loads and flow-weighted mean concentrations into and out of Taihu Lake were calculated,the annual and seasonal(cyanobacteria outbreak period)scale TN loads and concentrations of inflows and outflows and their contribution rates were calculated by water resources zones,then the paper analyzed the spacial-temporal variations of the TN loads and concentrations.The results showed that the average annual TN concentrations of the inflow rivers were significantly higher than those of the outflow rivers,and the inter-annual variation of TN concentrations of the inflow and outflow rivers were similar in all water resource zones.The inter-annual average TN load of the inflow rivers was much larger than those out of the lake,and the interannual variation patterns of annual and seasonal loads of TN into and out of the lake were similar in all water resource zones,the annual and seasonal TN concentrations of inflow rivers from Huxi,Zhexi and Wuchengxiyu zone were significantly higher than those from Yangchengdianmao zone and Hangjiahu zone,and the TN concentrations of flows out of west lake was higher than those from east lake,and the water quality of river around the lake was not significantly improved;The annual average loads of TN flowing into the lake was much greater than that flowing out of the lake,and the annual and seasonal variation patterns of TN loads of inflow and outflow rivers were similar in each water resources zone.The proportion of TN loads of inflow rivers from Huxi and Zhexi zone was first two among all zones,and the proportion of TN load from Taipu River was the largest.During the cyanobacteria outbreak period,The contribution of TN load of inflows during the cyanobacteria outbreak period to the whole annual TN load from Wuchengxiyu zone was the largest.The contribution of TN load from Taipu and Wangyu river during the cy

关 键 词：水资源分区 总氮 水量加权平均法 蓝藻 太湖 

分 类 号：X524[环境科学与工程—环境工程]