Study on the movement footprint of heavy metal copper in Poyang Lake
ZHOU Shan-shan1,2, WANG Hua1,2, LIU Xiao-hui3, YAN Huai-yu1,2, FANG Shao-wen4, DENG Yan-qing4, WANG Shi-gang5
1. College of Environment, Hohai University, Nanjing 210098, China;
2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China;
3. Shanghai Waterway Engineering Design and Consulting Co., Ltd., Shanghai 200120, China;
4. Jiangxi Hydrological Bureau, Nanchang 330000, China;
5. Poyang Lake Hydrological Bureau, Lushan, 332800, China
In this paper, the typical lake of river-connected lake in China, Poyang Lake, is selected as the research area. The MIKE21hydrodynamic model coupled with particle tracing model is used to simulate the movement footprint of heavy metal Cu in Poyang Lake under three different flow patterns of gravity type, top support type and inverted irrigation type. The simulation results showed that:(1) In January (gravity type), the heavy metal movement rate in the lower reaches of the Yangtze River was the fastest, at 2.111km/d. The particles moved along the north-south direction to the northwest direction of the center of the lake area, and then suddenly change its direction of movement. In May (top support type), the rate of heavy metal movement in the upper reaches of the Yangtze River was the highest, reaching 2.901km/d. In August (inverted type), similar to the top support type, the heavy metal movement rate in the upper reaches of the Yangtze River was the fastest, 3.287km/d. (2) Judging from the overall movement of heavy metals in each tributary, the water level of Poyang Lake was affected by the water from the five rivers and the backwater of the Yangtze River. The movement footprint of heavy metals in different point sources in the lake area was greatly affected by the shape of the top-supporting type and the inverted-flow type. The flow of heavy metals in the upper and lower reaches of the Yangtze River was relatively large under the influence of different lakes. The two tributaries of Fu River were the least affected by the shape of the lake. The particle motion rate was as follows:inverted type > top support type > gravity type.
周闪闪, 王华, 刘晓晖, 闫怀宇, 方少文, 邓燕青, 王仕刚. 鄱阳湖重金属Cu的运动足迹研究[J]. 中国环境科学, 2019, 39(9): 3989-3998.
ZHOU Shan-shan, WANG Hua, LIU Xiao-hui, YAN Huai-yu, FANG Shao-wen, DENG Yan-qing, WANG Shi-gang. Study on the movement footprint of heavy metal copper in Poyang Lake. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3989-3998.
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