Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis
Study Region: Poyang Lake, the largest freshwater lake in China, has been experiencing persistent shrinkage in recent years. Study Focus: The Poyang Lake Hydraulic Project (PLHP) was proposed to improve water resource and environment carrying capacity, its hydrological effects remain under investiga...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S221458182300280X |
| _version_ | 1827583735291183104 |
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| author | Zixuan Wang Yang Xiao Taotao Zhang Chen Xu Ran Gu Jiaming Liu |
| author_facet | Zixuan Wang Yang Xiao Taotao Zhang Chen Xu Ran Gu Jiaming Liu |
| author_sort | Zixuan Wang |
| collection | DOAJ |
| description | Study Region: Poyang Lake, the largest freshwater lake in China, has been experiencing persistent shrinkage in recent years. Study Focus: The Poyang Lake Hydraulic Project (PLHP) was proposed to improve water resource and environment carrying capacity, its hydrological effects remain under investigation. This study combined a hydrodynamic model with geostatistical connectivity analysis, to quantify the influence of the PLHP on surface water connectivity in Poyang Lake. New Hydrological Insights for the Region: The PLHP enlarges inundated areas most in the recession period (September-November), accounting for 85% of the total increase throughout the operating period (September-March), and enhances the interconnection probability within these inundated regions. Statistical analysis reveals that the Connectivity Function (CF) in low connectivity conditions (CF <0.4) can be significantly increased by 0.1–0.9, primarily in areas with lower topographies. While for the saucer-shaped sub-lakes, the PLHP can rarely extend the connecting processes between the main lake and sub-lakes in low-water-level conditions below 13 m, which is the lowest threshold height of most sub-lakes. Moreover, most isolated sub-lakes have merged into the main lake when the water level is higher than 14 m, thus the PLHP is no longer effective in this condition. Therefore, the enhancement effect of the PLHP on the connectivity of sub-lakes is restricted in both high- and low-water-level years, and is most pronounced in the medium-water-level year. |
| first_indexed | 2024-03-08T23:12:05Z |
| format | Article |
| id | doaj.art-028a3fb80fe743ce975f7bef572c87b9 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-03-08T23:12:05Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-028a3fb80fe743ce975f7bef572c87b92023-12-15T07:24:22ZengElsevierJournal of Hydrology: Regional Studies2214-58182023-12-0150101593Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysisZixuan Wang0Yang Xiao1Taotao Zhang2Chen Xu3Ran Gu4Jiaming Liu5National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, ChinaNational Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China; Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources, Hohai University, Nanjing, China; School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China; Yangtze Institute for Conservation and Development, Hohai University, Nanjing, China; Corresponding author at: National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China.School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, ChinaSchool of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, Suzhou, ChinaNational Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, ChinaNational Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, China; College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, ChinaStudy Region: Poyang Lake, the largest freshwater lake in China, has been experiencing persistent shrinkage in recent years. Study Focus: The Poyang Lake Hydraulic Project (PLHP) was proposed to improve water resource and environment carrying capacity, its hydrological effects remain under investigation. This study combined a hydrodynamic model with geostatistical connectivity analysis, to quantify the influence of the PLHP on surface water connectivity in Poyang Lake. New Hydrological Insights for the Region: The PLHP enlarges inundated areas most in the recession period (September-November), accounting for 85% of the total increase throughout the operating period (September-March), and enhances the interconnection probability within these inundated regions. Statistical analysis reveals that the Connectivity Function (CF) in low connectivity conditions (CF <0.4) can be significantly increased by 0.1–0.9, primarily in areas with lower topographies. While for the saucer-shaped sub-lakes, the PLHP can rarely extend the connecting processes between the main lake and sub-lakes in low-water-level conditions below 13 m, which is the lowest threshold height of most sub-lakes. Moreover, most isolated sub-lakes have merged into the main lake when the water level is higher than 14 m, thus the PLHP is no longer effective in this condition. Therefore, the enhancement effect of the PLHP on the connectivity of sub-lakes is restricted in both high- and low-water-level years, and is most pronounced in the medium-water-level year.http://www.sciencedirect.com/science/article/pii/S221458182300280XPoyang Lake floodplainPoyang Lake Hydraulic ProjectSurface water connectivityHydrodynamic modelGeostatistical connectivity analysis |
| spellingShingle | Zixuan Wang Yang Xiao Taotao Zhang Chen Xu Ran Gu Jiaming Liu Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis Journal of Hydrology: Regional Studies Poyang Lake floodplain Poyang Lake Hydraulic Project Surface water connectivity Hydrodynamic model Geostatistical connectivity analysis |
| title | Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis |
| title_full | Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis |
| title_fullStr | Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis |
| title_full_unstemmed | Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis |
| title_short | Effects of a proposed hydraulic project on the surface water connectivity in Poyang Lake floodplain system, China: Numerical simulation and geostatistical analysis |
| title_sort | effects of a proposed hydraulic project on the surface water connectivity in poyang lake floodplain system china numerical simulation and geostatistical analysis |
| topic | Poyang Lake floodplain Poyang Lake Hydraulic Project Surface water connectivity Hydrodynamic model Geostatistical connectivity analysis |
| url | http://www.sciencedirect.com/science/article/pii/S221458182300280X |
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