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Suitable Ecological Water Demand for Wetlands Restored to Different Historical Periods in a Latitude area and their Response to Changing Environments

Author

Listed:
  • Haipeng Xu

    (Chinese Academy of Sciences
    Heilongjiang University)

  • Dequan Zhang

    (Chinese Academy of Sciences)

  • Yao Wu

    (Chinese Academy of Sciences)

  • Peng Qi

    (Chinese Academy of Sciences)

  • Xiaofeng Wang

    (Heilongjiang University)

Abstract

As a result of climate change and human activities, the ecological water demand of wetlands cannot be met and is significantly degraded on a global scale. In order to prevent the deterioration of this situation, a number of wetland ecological recharge projects are being constructed. However, the lack of a foundation for the necessary research is preventing them from operating at their full potential. Therefore, the western part of Jilin Province, a concentrated wetland area, was selected as a typical study area. The Chinese government invested ￥3.3 billion yuan in ecological water recharge projects to restore the degraded wetlands in this region. In this study, the suitable ecological water demand (SEWD) for wetlands restored to different historical periods and their response to changing environments is calculated based on the ecological function method and GeoDetector. The results showed that the SEWD for wetlands is 73.14 × 108m3 if the 2018 scenario is maintained. In addition, if restored to the 2010’s, 2000’s, 1990’s and 1980’s scenario, the SEWD for wetlands is 80.35 × 108m3, 85.32 × 108m3, 95.77 × 108m3 and 93.66 × 108m3, respectively. Spatially, SEWD for wetlands is greater in the north than in the south. The order of contribution of different factors in different historical periods was as follows: wetland area > precipitation > paddy field area > evapotranspiration > saline land area > construction land area > dry land area > grassland area > forest land area. Compared with the single factor, the contribution of the interaction factors to the water demand is obviously improved, and the combination of wetland area and most factors can produce a higher q value. The research results provide effective technical support for the formulation of scientific and reasonable water replenishment schemes for wetlands in western Jilin Province and lay a good foundation for the restoration of wetland ecosystems.

Suggested Citation

  • Haipeng Xu & Dequan Zhang & Yao Wu & Peng Qi & Xiaofeng Wang, 2024. "Suitable Ecological Water Demand for Wetlands Restored to Different Historical Periods in a Latitude area and their Response to Changing Environments," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 38(14), pages 5683-5700, November.
    • Handle: RePEc:spr:waterr:v:38:y:2024:i:14:d:10.1007_s11269-024-03929-2
    DOI: 10.1007/s11269-024-03929-2
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    1. Wencong Yue & Zhongqi Liu & Meirong Su & Meng Xu & Qiangqiang Rong & Chao Xu & Zhenkun Tan & Xuming Jiang & Zhixin Su & Yanpeng Cai, 2022. "Inclusion of Ecological Water Requirements in Optimization of Water Resource Allocation Under Changing Climatic Conditions," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(2), pages 551-570, January.
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