Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control
Poyang Lake, the largest freshwater lake in China, plays a key role in regulating the hydrology, water quality and ecosystem in the middle reaches of the Yangtze River. Recent industrialization and urbanization in Jiangxi province have led to rapid increase in water consumption and water quality det...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-06-01
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| Series: | Hydrology Research |
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| Online Access: | http://hr.iwaponline.com/content/52/3/760 |
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| author | Hinchung Ho Dongfang Liang Guoxian Huang Shasha Fu Xinfa Xu |
| author_facet | Hinchung Ho Dongfang Liang Guoxian Huang Shasha Fu Xinfa Xu |
| author_sort | Hinchung Ho |
| collection | DOAJ |
| description | Poyang Lake, the largest freshwater lake in China, plays a key role in regulating the hydrology, water quality and ecosystem in the middle reaches of the Yangtze River. Recent industrialization and urbanization in Jiangxi province have led to rapid increase in water consumption and water quality deterioration. In this research, a numerical model is developed to simulate the hydrodynamics and water quality evolutions in Poyang Lake and its surrounding river network. The study links an in-house one-dimensional river network model with a MIKE multi-layered three-dimensional hydro-environmental model. The validated model is used to investigate the impact of a proposed downstream barrage on Poyang Lake's flow and ecosystem. All of the five considered barrage operation schemes demonstrate the capability of increasing the water level and inundation area during the dry period, especially in the lake's downstream region. The barrage schemes help reduce the lake's nutrient concentrations, due to the enhanced dilution at higher water levels. Nonetheless, the barrage leads to DO depletion which could pose a threat to the aquatic wildlife and habitats. This study's findings contribute to a better understanding of the hydro-environmental influence of the proposed barrage and thus the optimisation of its operation to mitigate the adverse influence. HIGHLIGHTS
A hybrid model is developed for the hydro-environmental simulation in Poyang Lake basin and its associated rivers.;
Investigation of the hydro-environmental impact of the Poyang Lake barrage using the validated hybrid model.;
The barrage increases the water level and inundated area but reduces nutrient and DO concentrations.;
Negative influences of the barrage can be limited by optimising the barrage operation.; |
| first_indexed | 2024-12-14T07:27:35Z |
| format | Article |
| id | doaj.art-af79acff7046429f89076818c643dde5 |
| institution | Directory Open Access Journal |
| issn | 1998-9563 2224-7955 |
| language | English |
| last_indexed | 2024-12-14T07:27:35Z |
| publishDate | 2021-06-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Hydrology Research |
| spelling | doaj.art-af79acff7046429f89076818c643dde52022-12-21T23:11:29ZengIWA PublishingHydrology Research1998-95632224-79552021-06-0152376078610.2166/nh.2021.184184Numerical study of hydro-environmental processes of Poyang Lake subject to engineering controlHinchung Ho0Dongfang Liang1Guoxian Huang2Shasha Fu3Xinfa Xu4 Department of Engineering, University of Cambridge, Cambridge, UK Department of Engineering, University of Cambridge, Cambridge, UK Chinese Research Academy of Environmental Sciences, Beijing, China and State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China Jiangxi Province Institute of Water Sciences, Nanchang, China Jiangxi Province Institute of Water Sciences, Nanchang, China Poyang Lake, the largest freshwater lake in China, plays a key role in regulating the hydrology, water quality and ecosystem in the middle reaches of the Yangtze River. Recent industrialization and urbanization in Jiangxi province have led to rapid increase in water consumption and water quality deterioration. In this research, a numerical model is developed to simulate the hydrodynamics and water quality evolutions in Poyang Lake and its surrounding river network. The study links an in-house one-dimensional river network model with a MIKE multi-layered three-dimensional hydro-environmental model. The validated model is used to investigate the impact of a proposed downstream barrage on Poyang Lake's flow and ecosystem. All of the five considered barrage operation schemes demonstrate the capability of increasing the water level and inundation area during the dry period, especially in the lake's downstream region. The barrage schemes help reduce the lake's nutrient concentrations, due to the enhanced dilution at higher water levels. Nonetheless, the barrage leads to DO depletion which could pose a threat to the aquatic wildlife and habitats. This study's findings contribute to a better understanding of the hydro-environmental influence of the proposed barrage and thus the optimisation of its operation to mitigate the adverse influence. HIGHLIGHTS A hybrid model is developed for the hydro-environmental simulation in Poyang Lake basin and its associated rivers.; Investigation of the hydro-environmental impact of the Poyang Lake barrage using the validated hybrid model.; The barrage increases the water level and inundated area but reduces nutrient and DO concentrations.; Negative influences of the barrage can be limited by optimising the barrage operation.;http://hr.iwaponline.com/content/52/3/760hydrodynamicshydro-environmentnumerical modellingpoyang lakewater qualitywater resource |
| spellingShingle | Hinchung Ho Dongfang Liang Guoxian Huang Shasha Fu Xinfa Xu Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control Hydrology Research hydrodynamics hydro-environment numerical modelling poyang lake water quality water resource |
| title | Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control |
| title_full | Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control |
| title_fullStr | Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control |
| title_full_unstemmed | Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control |
| title_short | Numerical study of hydro-environmental processes of Poyang Lake subject to engineering control |
| title_sort | numerical study of hydro environmental processes of poyang lake subject to engineering control |
| topic | hydrodynamics hydro-environment numerical modelling poyang lake water quality water resource |
| url | http://hr.iwaponline.com/content/52/3/760 |
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