引用本文:杨啸宇,王欣,丁磊,王逸飞,周玲霞,缴健,臧英平.长江南京段不同径流-潮汐动力作用下突发污染事故对饮用水水源地的影响研究[J].环境监控与预警,2023,15(4):45-51
YANG Xiaoyu,WANG Xin,DING Lei,WANG Yifei,ZHOU Lingxia,JIAO Jian,ZANG Yingping.Study on the Impact of Sudden Pollution Accidents on Drinking Water Sources under Different Runoff Tide Powers in Nanjing Section of the Yangtze River[J].Environmental Monitoring and Forewarning,2023,15(4):45-51
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长江南京段不同径流-潮汐动力作用下突发污染事故对饮用水水源地的影响研究
杨啸宇1,王欣2,丁磊1,王逸飞1,周玲霞2,缴健1*,臧英平2
1.南京水利科学研究院,港口航道泥沙工程交通行业重点实验室,江苏 南京 210029; 2.南京市长江河道管理处,江苏 南京 210011
摘要:
长江南京段水动力条件复杂,突发污染事故对下游饮用水水源地影响难以预测。基于构建的长江南京段二维水动力-水质耦合数学模型,对不同径流-潮汐动力作用下的突发污染事故进行模拟,分析其对长江水源地的影响。结果表明:洪季径流作用较强,污染团扩散速度受潮汐影响较弱,各水源地受污染团的影响时长基本接近,约为2.5~3.5 h。枯季径流作用减弱,污染团扩散速度受潮汐影响增强,越下游处受潮汐影响越大,各水源地受污染团的影响时长依次为:长江江浦水源地<燕子矶水源地<龙潭水源地。枯季污染物传播时的浓度大于洪季,洪季污染物传播浓度呈现随距离增大浓度减小的趋势。枯季流速受到潮汐影响,径流稀释作用减弱,使得污染物经八卦洲分流后的浓度略小于传播向下游的浓度。
关键词:  长江南京段  突发水污染事故  饮用水水源地  径流-潮汐动力
DOI:10.3969/j.issn.1674-6732.2023.04.007
分类号:X824
基金项目:南京市水务科研基金资助项目(202001)
Study on the Impact of Sudden Pollution Accidents on Drinking Water Sources under Different Runoff Tide Powers in Nanjing Section of the Yangtze River
YANG Xiaoyu1,WANG Xin2,DING Lei1,WANG Yifei1,ZHOU Lingxia2, JIAO Jian1*, ZANG Yingping2
1. Nanjing Hydraulic Research Institute, Port and Navigation Channel Sediment Transport Lab., MOT, Nanjing, Jiangsu 210029, China; 2. Nanjing Yangtze River Administration Office, Nanjing, Jiangsu 210011, China
Abstract:
The hydrodynamic condition of Nanjing section of the Yangtze River is complex, making it difficult to predict the impact of sudden pollution accidents on downstream drinking water sources. Sudden pollution accidents under different runoff tide powers are simulated to analyze the impact on the water sources based on a two dimensional hydrodynamic quality coupled numerical model of Nanjing section of the Yangtze River. The results show that the runoff effect is strong in flood seasons, and the diffusion rate of the pollution cluster is weakly affected by the tide. The influence duration of the pollution cluster in each water source is basically close, about 2.5~3.5 h. The effect of runoff in dry seasons weakens, and the diffusion rate of pollution cluster is affected more by the tide. Downstream is affected more by the tide and the influence duration of each water source shows in the order as follows: Jiangpu water source < Yanziji water source< Longtan water source. The pollutant concentration in dry seasons is greater than that in flood seasons, pollutant concentration in flood seasons decreases with the increase of distance. The flow velocity in dry season is affected by tide, and the dilution effect of runoff is weakened, making the pollutant concentration after the diversion of Baguazhou slightly smaller than concentration transmitted downstream.
Key words:  Nanjing section of the Yangtze River  Sudden water pollution accident  Drinking water source  Runoff tide power