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Conservation and ecofriendly utilization of wetlands associated with the Three Gorges Reservoir

  • Processes and Environmental Quality in the Yangtze River System
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Abstract

The Three Gorges Dam on the Yangtze River in China has created a major reservoir in which the water level fluctuates annually by about 30 m, generating a drawdown zone of up to 350 km2 in summer. Since construction of the dam, there has been scientific and public interest in how to use the drawdown zone resources in environmentally sustainable ways. To this end, and with government support, an international conference was held in Chongqing Municipality (China) in October 2011 on the subject of conservation and ecofriendly utilization of wetlands in the Three Gorges Reservoir. The conference proceedings were subsequently published in the Journal of Chongqing Normal University. The proceedings reports are reviewed here in the context of other relevant literature. The proceedings included papers on ecology, ecodesign and ecological engineering, erosion control, plant production and carbon sequestration, phytoremediation of pollution, hydrosystem management, and others. Several of the reports derive from experimental work conducted at a research field station on the Three Gorges Reservoir situated in Kaixian County, Chongqing Municipality. Plant communities in the drawdown zone are declining in diversity and evolving. Experimental plantings of flood-tolerant edible hydrophytes in a dike–pond system reveal their potential to provide economic returns for farmers, and flooding-tolerant trees, such as cypresses, also show promising results for stabilizing soils in the drawdown zone. Flood-tolerant natural plant communities vary strongly with depth and their composition provides useful indicators for revegetation strategies. In the region surrounding the reservoir, remnant natural broad-leaved evergreen forests are most effective in sequestering carbon, and within the drawdown zone, carbon is mostly stored below ground. There is strong interest in the potential of aquatic plants for removal of pollutants, notably N and P, from the reservoir water by means of floating beds. Other examples of applying ecodesign and ecological engineering strategies for restoration and management of rivers and lakes are also given. Scientific studies have provided valuable advice for ecofriendly utilization of the reservoir drawdown zone and further studies of the evolving condition of the reservoir can be expected to pay additional practical dividends.

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Authors and Affiliations

  1. School for Resource and Environmental Studies, Dalhousie University, Halifax, NS, B3H 4R2, Canada

    J. H. Martin Willison

  2. Chongqing Normal University, Shapingba District, Chongqing, 400047, People’s Republic of China

    Ruoxi Li

  3. College of Resources and Environmental Science, Chongqing University, Chongqing, 400044, People’s Republic of China

    Xingzhong Yuan

  4. Key Laboratory of Exploitation of Southwest Resources and Environmental Hazards Control Engineering, Ministry of Education, Chongqing University, Chongqing, 400044, People’s Republic of China

    Xingzhong Yuan

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  1. J. H. Martin Willison
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  2. Ruoxi Li
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  3. Xingzhong Yuan
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Correspondence to J. H. Martin Willison.

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Responsible editor: Philippe Garrigues

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Willison, J.H.M., Li, R. & Yuan, X. Conservation and ecofriendly utilization of wetlands associated with the Three Gorges Reservoir. Environ Sci Pollut Res 20, 6907–6916 (2013). https://doi.org/10.1007/s11356-012-1438-3

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  • DOI: https://doi.org/10.1007/s11356-012-1438-3

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