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<p>As the functions of coastal wetlands are seriously affected by human activities, wetland cities are facing the challenge of balancing resource utilization and economic growth. To achieve sustainable development in coastal wetland cities, it is crucial to explore an innovative production mode that integrate wetland ecosystems with local industries. In this study, we used Dongying city, a coastal wetland city located in the Yellow River Delta of China, as a case study to develop an industrial ecosystem framework and evaluate its sustainability with emergy analysis (EA). After identifying the problems associated with the current industries, we proposed an improved industrial ecosystem that synergizes wetland resources with existing industries by extending and interlinking supply chains. Using an enhanced emergy analysis method to evaluate the system’s sustainability, we found that the performance of the system improved after the reconstruction. The environmental loading ratio and the emergy waste ratio of the improved industrial ecosystem were low (ELR = 1.83 and EWR = 0.25%, respectively), and the emergy sustainability index greatly improved (ESI = 67.15) after the reconstruction. The emergy of raw coal decreased by 29%, that of solid waste decreased by 47.8%, and that of other wastes, such as cotton stalk, shell, and excrement, decreased 100%. These findings provide valuable policy insights for policymakers to reorganize development strategies for coastal wetland cities. By aligning industrial systems with ecological preservation, sustainable development can be achieved in line with local conditions.</p>

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Emergy-based evaluation of an industrial ecosystem reconstruction in a typical coastal wetland city of China

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Zibo Yu,
  • Zongqin Wu,
  • Xin Tian,
  • Junhong Bai,
  • Yanan Guan,
  • Liehui Zhi,
  • Liang Dong

摘要

As the functions of coastal wetlands are seriously affected by human activities, wetland cities are facing the challenge of balancing resource utilization and economic growth. To achieve sustainable development in coastal wetland cities, it is crucial to explore an innovative production mode that integrate wetland ecosystems with local industries. In this study, we used Dongying city, a coastal wetland city located in the Yellow River Delta of China, as a case study to develop an industrial ecosystem framework and evaluate its sustainability with emergy analysis (EA). After identifying the problems associated with the current industries, we proposed an improved industrial ecosystem that synergizes wetland resources with existing industries by extending and interlinking supply chains. Using an enhanced emergy analysis method to evaluate the system’s sustainability, we found that the performance of the system improved after the reconstruction. The environmental loading ratio and the emergy waste ratio of the improved industrial ecosystem were low (ELR = 1.83 and EWR = 0.25%, respectively), and the emergy sustainability index greatly improved (ESI = 67.15) after the reconstruction. The emergy of raw coal decreased by 29%, that of solid waste decreased by 47.8%, and that of other wastes, such as cotton stalk, shell, and excrement, decreased 100%. These findings provide valuable policy insights for policymakers to reorganize development strategies for coastal wetland cities. By aligning industrial systems with ecological preservation, sustainable development can be achieved in line with local conditions.