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Modelling floodplain inundation for environmental flows: Gwydir wetlands, Australia

Author

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  • Powell, S.J.
  • Letcher, R.A.
  • Croke, B.F.W.

Abstract

Floodplain wetlands rely on catchment flows to maintain the flooding cycles critical to their ecological integrity. The development of water resources has significantly altered the flow patterns in many river systems. Recent research into water requirements for wetland systems shows that duration, frequency, depth, timing and extent of flooding are the most important influences on ecological communities. Modelling these systems is hampered by a lack of data and inappropriate model structures. Remote sensing using AVHRR satellite data were shown to be an effective option for assessing flood dynamics. Vegetation communities and flood patterns of the Gwydir floodplain were analysed to provide a model structure based on channel, flowpath and core wetland components. The temporal and spatial behaviour of each component was described using water balance principles. The model was calibrated and tested under a range of climatic conditions and the results demonstrate that the model can simulate ecologically significant flood dynamics of the floodplain wetland. This study demonstrates that a conceptually based, semi-distributed water balance approach can provide the basis for an effective decision support system for water management.

Suggested Citation

  • Powell, S.J. & Letcher, R.A. & Croke, B.F.W., 2008. "Modelling floodplain inundation for environmental flows: Gwydir wetlands, Australia," Ecological Modelling, Elsevier, vol. 211(3), pages 350-362.
    • Handle: RePEc:eee:ecomod:v:211:y:2008:i:3:p:350-362
    DOI: 10.1016/j.ecolmodel.2007.09.013
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    Citations

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    Cited by:

    1. Ralph Mac Nally & Gregory F. B. Horrocks & Hania Lada, 2017. "Anuran responses to pressures from high-amplitude drought–flood–drought sequences under climate change," Climatic Change, Springer, vol. 141(2), pages 243-257, March.
    2. J. Teng & J. Vaze & D. Dutta & S. Marvanek, 2015. "Rapid Inundation Modelling in Large Floodplains Using LiDAR DEM," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(8), pages 2619-2636, June.
    3. Wen, Li & Yang, Xihua & Saintilan, Neil, 2012. "Local climate determines the NDVI-based primary productivity and flooding creates heterogeneity in semi-arid floodplain ecosystem," Ecological Modelling, Elsevier, vol. 242(C), pages 116-126.
    4. Haiyan Duan & Menghong Xu & Yu Cai & Xianen Wang & Jialong Zhou & Qiong Zhang, 2019. "A Holistic Wetland Ecological Water Replenishment Scheme with Consideration of Seasonal Effect," Sustainability, MDPI, vol. 11(3), pages 1-15, February.
    5. Chen, H. & Zhao, Y.W., 2011. "Evaluating the environmental flows of China's Wolonghu wetland and land use changes using a hydrological model, a water balance model, and remote sensing," Ecological Modelling, Elsevier, vol. 222(2), pages 253-260.
    6. Chen, Bin & Chen, Lifan & Lu, Ming & Xu, Bing, 2017. "Wetland mapping by fusing fine spatial and hyperspectral resolution images," Ecological Modelling, Elsevier, vol. 353(C), pages 95-106.
    7. Yang, Wei, 2011. "A multi-objective optimization approach to allocate environmental flows to the artificially restored wetlands of China's Yellow River Delta," Ecological Modelling, Elsevier, vol. 222(2), pages 261-267.

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