NUMERICAL SIMULATION ON WATER PURIFICATION BY CIRCULATING ENGINEERING OF A LARGE LANDSCAPE WATER SYSTEM IN NORTHERN CITIES IN CHINA

LIN Yi; CHEN Lei; ZHOU Guohua

doi:10.13205/j.hjgc.202201009

Volume 40 Issue 1

Mar. 2022

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LIN Yi, CHEN Lei, ZHOU Guohua. NUMERICAL SIMULATION ON WATER PURIFICATION BY CIRCULATING ENGINEERING OF A LARGE LANDSCAPE WATER SYSTEM IN NORTHERN CITIES IN CHINA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 52-59,77. doi: 10.13205/j.hjgc.202201009

Citation:

LIN Yi, CHEN Lei, ZHOU Guohua. NUMERICAL SIMULATION ON WATER PURIFICATION BY CIRCULATING ENGINEERING OF A LARGE LANDSCAPE WATER SYSTEM IN NORTHERN CITIES IN CHINA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 52-59,77. doi: 10.13205/j.hjgc.202201009

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NUMERICAL SIMULATION ON WATER PURIFICATION BY CIRCULATING ENGINEERING OF A LARGE LANDSCAPE WATER SYSTEM IN NORTHERN CITIES IN CHINA

doi: 10.13205/j.hjgc.202201009

LIN Yi¹,
CHEN Lei¹,
ZHOU Guohua^{2,3
,
,}

1. Tianjin Eco-City Investment and Development Co., Ltd, Tianjin 300486, China;
2. Tianjin Eco-city Political Landscape Company, Tianjin 300480, China;
3. School of Civil Engineering, Tianjin University, Tianjin 300072, China

Received Date: 2020-12-17
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

Jinghu Lake is the largest landscape lake in Sino-Singapore Tianjin eco city. It connects Gudao River and Huifeng River to form a unique water ecosystem, which is the representative of large-scale landscape water system in northern cities. Thus, the water system environment attracted great attention. Based on the investigation and analysis of the construction of water circulation purification facilities and the implementation of water quality improvement projects in Jing water system, Delft3D FM model was built to study the hydrodynamic and water quality evolution process in Jing water system under different engineering schemes, whose results were further evaluated to verify the engineering effect on water quality improving. The results indicated that the water quality of Jing water system was obviously affected by rainfall. By comparing the changes of water quality before and after the flood season, the concentration of COD and TP increased by 10% after the flood season, even increased by 60% in some river sections, but the NH₃-N decrease by 20%~30% after the flood season. Furthermore, through the engineering measures, such as setting up water replenishment, removing isolation dam, and installing circulating pump & drainage pump, the hydrodynamic condition of Jing water system was greatly improved, and NH₃-N and TP generally met the requirements of class IV water standard, for that NH₃-N was reduced by 3%~25%, and TP was reduced by 6%~50%. Engineering measures should take water environment background, pollution source control, water conservancy facilities operation and other factors into account, to develop water quality improvement strategy.
- landscape water system,
- water quality assessment,
- hydrodynamic water quality model,
- Delft3D FM

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References(19)

References

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