EVALUATION OF ECOLOGICAL WATER REPLENISHMENT AMOUNT AND PATH FOR URBAN SMALL AND MICRO WETLANDS BASED ON HYDRODYNAMIC PROCESS: A CASE STUDY OF BEIJING HANSHIQIAO WETLAND

GENG Zhi; DU Jizeng; LIU Hongxi; CAO Bo; LI Xinyu; ZHANG Yong; CUI Baoshan

doi:10.13205/j.hjgc.202301007

Volume 41 Issue 1

Jan. 2023

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GENG Zhi, DU Jizeng, LIU Hongxi, CAO Bo, LI Xinyu, ZHANG Yong, CUI Baoshan. EVALUATION OF ECOLOGICAL WATER REPLENISHMENT AMOUNT AND PATH FOR URBAN SMALL AND MICRO WETLANDS BASED ON HYDRODYNAMIC PROCESS: A CASE STUDY OF BEIJING HANSHIQIAO WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 51-60. doi: 10.13205/j.hjgc.202301007

Citation:

GENG Zhi, DU Jizeng, LIU Hongxi, CAO Bo, LI Xinyu, ZHANG Yong, CUI Baoshan. EVALUATION OF ECOLOGICAL WATER REPLENISHMENT AMOUNT AND PATH FOR URBAN SMALL AND MICRO WETLANDS BASED ON HYDRODYNAMIC PROCESS: A CASE STUDY OF BEIJING HANSHIQIAO WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 51-60. doi: 10.13205/j.hjgc.202301007

Citation:

GENG Zhi, DU Jizeng, LIU Hongxi, CAO Bo, LI Xinyu, ZHANG Yong, CUI Baoshan. EVALUATION OF ECOLOGICAL WATER REPLENISHMENT AMOUNT AND PATH FOR URBAN SMALL AND MICRO WETLANDS BASED ON HYDRODYNAMIC PROCESS: A CASE STUDY OF BEIJING HANSHIQIAO WETLAND[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 51-60. doi: 10.13205/j.hjgc.202301007

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EVALUATION OF ECOLOGICAL WATER REPLENISHMENT AMOUNT AND PATH FOR URBAN SMALL AND MICRO WETLANDS BASED ON HYDRODYNAMIC PROCESS: A CASE STUDY OF BEIJING HANSHIQIAO WETLAND

doi: 10.13205/j.hjgc.202301007

GENG Zhi¹,
DU Jizeng^1,4,
LIU Hongxi²,
CAO Bo³,
LI Xinyu^1,4,
ZHANG Yong^{3
,
,},
CUI Baoshan^1,4

1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;
2. Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, China;
3. Beijing Shunyi Hanshiqiao Wetland Nature Reserve Management Center, Beijing 101309, China;
4. Yellow River Estuary Wetland Ecosystem Observation and Research Station, Ministry of Education, Dongying 257500, China

Received Date: 2022-07-15
Available Online: 2023-03-23

Abstract

Abstract

Hanshiqiao Wetland Nature Reserve plays an essential role in water conservation, local climate regulation, and biodiversity protection of Beijing. In recent years, as the warming-drying trend and urbanization become remarkable in North China, Hanshiqiao Wetland faces severe water shortage problems, causing severe degradation of the ecology. Due to the implementation of water delivery projects such as the South-to-North Water Diversion Project, the shortage of water resources in Beijing has been effectively erased, making the supplement project of ecological water in the Hanshiqiao Wetland possible. However, formulating a scientific, efficient, and sustainable supplement plan is still an urgent problem, where the characteristics of the ecological water system network and needs of biodiversity in the Hanshiqiao Wetland should be considered. Based on observation data and field measurement results, this paper explored and determined the optimum water level of wetlands and the corresponding supplement project of ecological water from 3 perspectives:wetland water area, suitable habitat for reeds, and hydrological connectivity. The results showed that the water level must be at least 25.7 m to maintain the normal ecological function, and the optimum water level was 26.2 m. If the wetland water level exceeded the optimum water level, the effectiveness of the supplement project would gradually decrease and then become stable. Furtherly, we simulated the hydrodynamic process of the wetland by the MIKE21 model under four scenarios. Then, we explored the influence of different water supplement projects on the hydrodynamic process of the Hanshiqiao Wetland. We found that the hydrodynamic behavior of the north part got significantly improved, under the water replenishment scenario from the single route, however, the average velocity of the entire wetland did not markedly improve. The hydrodynamic behavior at the entrance of two replenishment routes and the entire wetland was improved. When the water replenishment was conducted by three divided routes, the hydrodynamic behavior was distributed more evenly. The research results provide necessary theoretical support for improving the efficiency of ecological water supplements and promoting the sustainable development of the wetland ecosystem in the Hanshiqiao Wetland Reserve.
- ecological water supplement,
- reed wetlands,
- hydrological connectivity,
- hydrodynamic force,
- ecological water network

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References(26)

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