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Sand nourishments have become a popular management option to mitigate coastal retreat for sites with abundant sand supplies. Off-site sand is placed on the dry beach or under water at typical water depths up to 10 m. This nearshore zone has a high bed level variability and contains a cascade of morphological features. This makes the understanding and forecasting of nourishment morphodynamics and impacts challenging. The emerging climate-change effects, sea-level rise in particular, call for significant progress on this topic in due time. This paper presents an overview of field, laboratory and modeling studies on nourishment morphodynamics. Four key knowledge gaps were identified. First, the spreading of nourished sand through the coastal zone is poorly understood, and has not been quantified. Second, it is unclear how design variables such as size, placement location and grain-size affect the nourishment lifetime, spreading and impact. Third, the cumulative effect of repeated nourishments on the coastal system is unknown. Fourth, models are not capable to reliably predict the morphological development and impact of nourishments. To tackle these knowledge gaps, we have launched the SOURCE research project.

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Sand Nourishments: Review of Research and Introduction of the SOURCE Project

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Jebbe van der Werf,
  • Geert Campmans,
  • Johan Damveld,
  • Trang Minh Duong,
  • Robert-Jan den Haan,
  • Erik M. Horstman,
  • Bas Huisman,
  • Douglas Krafft,
  • Wietse van de Lageweg,
  • Bjarke Larsen,
  • Juul Limpens,
  • Quirijn Lodder,
  • Maaike Maarse,
  • Brian C. McFall,
  • Timothy Price,
  • Gerben Ruessink,
  • Marije Schaafsma,
  • Matthieu de Schipper,
  • Jeroen Wijsman

摘要

Sand nourishments have become a popular management option to mitigate coastal retreat for sites with abundant sand supplies. Off-site sand is placed on the dry beach or under water at typical water depths up to 10 m. This nearshore zone has a high bed level variability and contains a cascade of morphological features. This makes the understanding and forecasting of nourishment morphodynamics and impacts challenging. The emerging climate-change effects, sea-level rise in particular, call for significant progress on this topic in due time. This paper presents an overview of field, laboratory and modeling studies on nourishment morphodynamics. Four key knowledge gaps were identified. First, the spreading of nourished sand through the coastal zone is poorly understood, and has not been quantified. Second, it is unclear how design variables such as size, placement location and grain-size affect the nourishment lifetime, spreading and impact. Third, the cumulative effect of repeated nourishments on the coastal system is unknown. Fourth, models are not capable to reliably predict the morphological development and impact of nourishments. To tackle these knowledge gaps, we have launched the SOURCE research project.