长江科学院院报2023，Vol.40Issue(12)：45-51,7.DOI:10.11988/ckyyb.20220428
南湖余氯时空分布规律数值模拟与分析
Temporal and Spatial Distribution of Chlorine in Nanhu Lake:Numerical Simulation and Analysis
摘要
Abstract
The widespread use of chlorine-containing disinfectants inevitably leads to chlorine pollution as residues enter natural water bodies through rainfall runoff.To investigate the temporal and spatial distribution of chlorine in lakes,a hydrodynamic-water quality model of Nanhu Lake was established using the Infoworks ICM simulation plat-form.The model was used to analyze the temporal and spatial variation of chlorine concentration in Nanhu Lake un-der different chlorine discharge cycles and rainfall conditions.The results indicated that:1)During a single dis-charge,a high concentration zone of chlorine was initially formed in the nearshore water body.The chlorine diffused from the lakeshore to the lake center,where the concentration decreased.At the end of chlorine discharge,the con-centration reached a peak value of 1.25 mg/L and gradually decreased,with chlorine concentration attenuating from the water center towards the boundary.This process lasted approximately 14 hours.2)The influence of periodic in-flow is mainly reflected in the decrease of chlorine decay rate in the new cycle.The decay duration increased,and the peak value of chlorine concentration also increased.The peak values of chlorine concentration in three cycles were 1.25 mg/L,1.58 mg/L,and 1.89 mg/L,respectively,with decay durations being 14 hours,15.7 hours,and 17.1 hours,respectively.3)Under the influence of rainfall,the range and depth of chlorine pollution expanded to-wards the lake center,and the pollution duration increased to approximately 20 hours.The peak concentration of chlorine also increased,reaching up to 7 mg/L.关键词
水环境/余氯/时空分布/含氯消毒剂/Infoworks ICM/南湖Key words
water environment/residual chlorine/spatial and temporal distribution/chlorine-containing disinfect-ant/Infoworks ICM/Nanhu Lake分类
资源环境引用本文复制引用
王景芸,李剑锋,季臣,杨炜民..南湖余氯时空分布规律数值模拟与分析[J].长江科学院院报,2023,40(12):45-51,7.基金项目
武汉市科技计划项目(2020020201010021) （2020020201010021）
