四川环境2023，Vol.42Issue(6)：1-7,7.DOI:10.14034/j.cnki.schj.2023.06.001
基于随机森林的引江济太入湖磷通量计算
Phosphorus Flux Calculation of Yangtze River-Lake Taihu Water Diversion Based on Random Forest
摘要
Abstract
Under the background that the risk of algal blooms is still high in Lake Taihu and the planned water diversion volume increases in the future,it is of great significance to identify the phosphorus flux of different forms of Yangtze River-Lake Taihu water diversion.Based on field environmental monitoring data from 17 sampling sites along Wangyu River and Lake Taihu in 2021,the random forest(RF)method was used to build a simulation model of dissolved total phosphorus(DTP)concentration and estimate the dissolved and particulate phosphorus flux into Lake Taihu.The results showed that the R2,RMSE and NSE of RF model were 0.690,0.0110 and 0.651,respectively,which had good fitting and generalization performance and could be applied to retrieve historical DTP concentration.Total phosphorus,wind direction,turbidity,water temperature,pH and dissolved oxygen were important predictors of the RF model.From 2010 to 2021,the DTP flux of Wangyu River into Lake Taihu was 6.7-83.7 t,with an average annual flux of 34.6 t,accounting for 42.2 to 66.6％of TP flux.Therefore,the influence of dissolved phosphorus input caused by Yangtze River-Lake Taihu water diversion on phosphorus cycle and water environment of Gonghu Bay needs to be paid more attention.This study results can provide key data for the analysis of the influence,and provide technical support for the optimization of water diversion scheme.关键词
引江济太/望虞河/磷形态/磷通量/随机森林Key words
Yangtze River-Lake Taihu water diversion/Wangyu river/phosphorus form/phosphorus flux/random forest分类
资源环境引用本文复制引用
陈年浩,陆昊,饶文昕,刘彤,钱新..基于随机森林的引江济太入湖磷通量计算[J].四川环境,2023,42(6):1-7,7.基金项目
江苏省自然科学基金项目(BK20211155) （BK20211155）
国家自然科学基金项目(41907388). （41907388）
