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<p>Excessive reliance on hard-engineered revetments has stabilized urban rivers but often degraded their ecosystems. This study evaluated the ecological functions of riprap revetments constructed along the Cuatien River in Vinh City, Vietnam, with a focus on vegetation recovery, soil improvement, fauna diversity, and microclimate regulation between 2019 and 2024. Vegetation gradually established on the riprap surface, with species richness increasing to 15 woody plants, 5 vines, 18 shrubs/grasses, and 2 ferns. Grass and shrub coverage increased from 5.3% in 2020 to 21.9% in 2024, with settled soil increasing from 519 to 1,793 g/m2 and soil organic matter rising from 12.1 to 14.9 g/kg. The porous structure of the riprap combined with layered vegetation further enhanced habitat complexity, leading to an overall increase in the total number of animal and insect species across aerial, terrestrial, and amphibious groups—from 24 species in 2020 to 36 species in 2022, and 40 species in 2024. Vegetation cover also moderated the microclimate, lowering surface temperatures by 3–6&#xa0;°C and increasing relative humidity by 8–12%. Overall, ecological riprap revetments function as nature-based infrastructure that supports plant succession, enriches soils, enhances biodiversity, and stabilizes local microclimates in urban river systems. This work provides practical guidance for implementing riverbank stabilization that simultaneously advances sustainability goals and climate change adaptation.</p>

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Role of ecological revetment in ecosystem recovery and microclimate regulation along the urban river in Vinh City, Vietnam

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Van Tai Tang,
  • Tran Ngoc Binh,
  • Afshin Maleki,
  • Kazem Godini,
  • Thương Nguyen

摘要

Excessive reliance on hard-engineered revetments has stabilized urban rivers but often degraded their ecosystems. This study evaluated the ecological functions of riprap revetments constructed along the Cuatien River in Vinh City, Vietnam, with a focus on vegetation recovery, soil improvement, fauna diversity, and microclimate regulation between 2019 and 2024. Vegetation gradually established on the riprap surface, with species richness increasing to 15 woody plants, 5 vines, 18 shrubs/grasses, and 2 ferns. Grass and shrub coverage increased from 5.3% in 2020 to 21.9% in 2024, with settled soil increasing from 519 to 1,793 g/m2 and soil organic matter rising from 12.1 to 14.9 g/kg. The porous structure of the riprap combined with layered vegetation further enhanced habitat complexity, leading to an overall increase in the total number of animal and insect species across aerial, terrestrial, and amphibious groups—from 24 species in 2020 to 36 species in 2022, and 40 species in 2024. Vegetation cover also moderated the microclimate, lowering surface temperatures by 3–6 °C and increasing relative humidity by 8–12%. Overall, ecological riprap revetments function as nature-based infrastructure that supports plant succession, enriches soils, enhances biodiversity, and stabilizes local microclimates in urban river systems. This work provides practical guidance for implementing riverbank stabilization that simultaneously advances sustainability goals and climate change adaptation.