How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas
Study region: Lake Chaohu Basin, a typical agricultural watershed with polders in lowland areas Study focus: Agricultural polders are typical agro-ecosystem units to prevent flooding in lowland areas worldwide. When facing extreme floods, they are also used to store floodwater temporarily. This func...
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824004853 |
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| author | Hui Xie Yunliang Li Meiqi Shang Jianwei Dong Xiaoxian Tang Nengsheng Wan Yang Wang Xijun Lai |
| author_facet | Hui Xie Yunliang Li Meiqi Shang Jianwei Dong Xiaoxian Tang Nengsheng Wan Yang Wang Xijun Lai |
| author_sort | Hui Xie |
| collection | DOAJ |
| description | Study region: Lake Chaohu Basin, a typical agricultural watershed with polders in lowland areas Study focus: Agricultural polders are typical agro-ecosystem units to prevent flooding in lowland areas worldwide. When facing extreme floods, they are also used to store floodwater temporarily. This function shift significantly affects nutrient dynamics and transport process, which, however, remains poorly understood. This study used field investigation and high-frequency monitoring to examine the nutrient dynamics modulated by agricultural polders in Lake Chaohu Basin, China when facing the extreme 2020 Yangtze River flood. New hydrological insight for the region: The results highlight the retention-reaction-remobilization function of agricultural polders to reduce nutrient pollution under extreme flooding. Inundated polders had lower concentrations of nitrogen (N) than protected polders, indicating the retention and reaction of N during inundation. Drained polders exhibited poorer water quality than inundated polders in terms of dissolved oxygen, N and phosphorus (P) concentrations, suggesting an increase of pollution during remobilization of the floodwater. However, such increase had little impact on the water quality of receiving rivers which showed generally better water quality than in early flood rising period. The above results indicated the buffering role of agricultural polders to mitigate nutrient pollution when facing extreme flooding. The outcomes from this study provide new insights into flood control strategies to integrate water quality restoration and sustainable agriculture in lowland areas. |
| format | Article |
| id | doaj-art-a546adbfb60f48c296bd5f149935172a |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-a546adbfb60f48c296bd5f149935172a2025-01-22T05:42:10ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102136How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areasHui Xie0Yunliang Li1Meiqi Shang2Jianwei Dong3Xiaoxian Tang4Nengsheng Wan5Yang Wang6Xijun Lai7Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Poyang Lake Wetland Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, ChinaKey Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Poyang Lake Wetland Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, ChinaKey Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Jiangsu Key Laboratory of Ocean-Land Environmental Change and Ecological Construction, School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, ChinaJiangsu Key Laboratory of Ocean-Land Environmental Change and Ecological Construction, School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China; Corresponding author.Institute of Lake Ecology and Environment, Chaohu Lake Bureau of Anhui Province, Hefei 238000, ChinaInstitute of Lake Ecology and Environment, Chaohu Lake Bureau of Anhui Province, Hefei 238000, ChinaLu’an Three Gorges Corporation Water Co., Ltd, Lu’an 237010, ChinaKey Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Poyang Lake Wetland Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, China; Corresponding author at: Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.Study region: Lake Chaohu Basin, a typical agricultural watershed with polders in lowland areas Study focus: Agricultural polders are typical agro-ecosystem units to prevent flooding in lowland areas worldwide. When facing extreme floods, they are also used to store floodwater temporarily. This function shift significantly affects nutrient dynamics and transport process, which, however, remains poorly understood. This study used field investigation and high-frequency monitoring to examine the nutrient dynamics modulated by agricultural polders in Lake Chaohu Basin, China when facing the extreme 2020 Yangtze River flood. New hydrological insight for the region: The results highlight the retention-reaction-remobilization function of agricultural polders to reduce nutrient pollution under extreme flooding. Inundated polders had lower concentrations of nitrogen (N) than protected polders, indicating the retention and reaction of N during inundation. Drained polders exhibited poorer water quality than inundated polders in terms of dissolved oxygen, N and phosphorus (P) concentrations, suggesting an increase of pollution during remobilization of the floodwater. However, such increase had little impact on the water quality of receiving rivers which showed generally better water quality than in early flood rising period. The above results indicated the buffering role of agricultural polders to mitigate nutrient pollution when facing extreme flooding. The outcomes from this study provide new insights into flood control strategies to integrate water quality restoration and sustainable agriculture in lowland areas.http://www.sciencedirect.com/science/article/pii/S2214581824004853NitrogenPhosphorusLake ChaohuFloodplainNature-based solutionClimate change |
| spellingShingle | Hui Xie Yunliang Li Meiqi Shang Jianwei Dong Xiaoxian Tang Nengsheng Wan Yang Wang Xijun Lai How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas Journal of Hydrology: Regional Studies Nitrogen Phosphorus Lake Chaohu Floodplain Nature-based solution Climate change |
| title | How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas |
| title_full | How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas |
| title_fullStr | How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas |
| title_full_unstemmed | How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas |
| title_short | How do agricultural polders modulate nutrient dynamics under extreme flooding: Insights for water management in lowland areas |
| title_sort | how do agricultural polders modulate nutrient dynamics under extreme flooding insights for water management in lowland areas |
| topic | Nitrogen Phosphorus Lake Chaohu Floodplain Nature-based solution Climate change |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824004853 |
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