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Numerical Simulation of Effect of Channel Morphology Reconfiguration on Migration and Diffusion of Pollutants in Urban Stream
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Lin-yue DENG1a, Jie TANG1a, Yao CHEN1a, 1b, Fei LIU1a, 1b, Yi-zhi HOU1a, Chun-juan GAN2, Yu-qing TAN1a
Water Resources and Power | 2023, 41(9) : 40 - 43
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Water Resources and Power | 2023, 41(9): 40-43
• HYDROLOGY, WATER RESOURCES AND ENVIRONMENT •
Numerical Simulation of Effect of Channel Morphology Reconfiguration on Migration and Diffusion of Pollutants in Urban Stream
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Lin-yue DENG1a, Jie TANG1a, Yao CHEN1a, 1b, Fei LIU1a, 1b, Yi-zhi HOU1a, Chun-juan GAN2, Yu-qing TAN1a
Affiliations
  • 1a.School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
  • 1b.Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing 400074, China
  • 2.Chongqing Municipal Research Institute of Design Ltd. Co., Chongqing 400012, China
Published: 2023-09-25 doi: 10.20040/j.cnki.1000-7709.2023.20222409
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A typical urban channelized (Urban) channel in Liangtan River, Chongqing, was reshaped into six types of channel by a numerical simulation tool named RiverBuilder. And then a two-dimensional hydrodynamic convection-diffusion model was constructed to study the effect of channel morphology reconfiguration on migration and diffusion index, such as water turn-over time (TTOT), pollutant concentration curve (CCC), pollutant reaching maximum time (MMT) and pollutant arriving time (AAT). The results show that the channel morphology reconfigured by changing the width (Wbf), depth (Dbf), and meandering (Md) of the Urban channel can inhibit the migration and diffusion of pollutants to a certain extent, but the influencing effect is not as good as that of the composite channel based on the variable Dbf. Meanwhile, the near-natural (Natural) channel has the strongest anti-pollute capacity and inhibiting ability of pollutants diffusion, indicating it is more suitable for the self-purification process of pollutants. It is confirmed that the channel morphology based on disordered and complex changes in Wbf, Dbf, and Md is closer to the Natural channel, which can provide good eco-hydraulic conditions for the improvement of river water quality.

channel morphology  /  hydrodynamic model  /  pollutants  /  migration and diffusion  /  geometric variables  /  eco-hydraulics
Lin-yue DENG, Jie TANG, Yao CHEN, Fei LIU, Yi-zhi HOU, Chun-juan GAN, Yu-qing TAN. Numerical Simulation of Effect of Channel Morphology Reconfiguration on Migration and Diffusion of Pollutants in Urban Stream[J]. Water Resources and Power, 2023 , 41 (9) : 40 -43 . DOI: 10.20040/j.cnki.1000-7709.2023.20222409
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Year 2023 volume 41 Issue 9
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20222409
  • Receive Date：2022-11-15
  • Online Date：2026-01-28
  • Published：2023-09-25
Article Data
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History
  • Received：2022-11-15
  • Revised：2022-12-12
Funding
Affiliations
    1a.School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
    1b.Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing 400074, China
    2.Chongqing Municipal Research Institute of Design Ltd. Co., Chongqing 400012, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20222409
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红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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