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Hard structures for coastal protection, towards greener designs
Schoonees; Gijón Mancheño; Scheres; Bouma, T.J.; Silva, R.; Schlurmann; Schüttrumpf, H. (2019). Hard structures for coastal protection, towards greener designs. Est. Coast. 42(7): 1709-1729.
In: Estuaries and Coasts. Estuarine Research Federation: Port Republic, Md.. ISSN 1559-2723; e-ISSN 1559-2731, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Author keywords
    Coastal structures; Green infrastructure; Building with nature; Ecosystem engineering; Nature-based solutions; Environment-friendly engineering; Ecosystem services

Auteurs  Top 
  • Schoonees, T.
  • Gijón Mancheño, A.
  • Scheres, B.
  • Bouma, T.J., meer
  • Silva, R.
  • Schlurmann, T.
  • Schüttrumpf, H.

    Over recent years, many coastal engineering projects have employed the use of soft solutions as these are generally less environmentally damaging than hard solutions. However, in some cases, local conditions hinder the use of soft solutions, meaning that hard solutions have to be adopted or, sometimes, a combination of hard and soft measures is seen as optimal. This research reviews the use of hard coastal structures on the foreshore (groynes, breakwaters and jetties) and onshore (seawalls and dikes). The purpose, functioning and local conditions for which these structures are most suitable are outlined. A description is provided on the negative effects that these structures may have on morphological, hydrodynamic and ecological conditions. To reduce or mitigate these negative impacts, or to create new ecosystem services, the following nature-based adaptations are proposed and discussed: (1) applying soft solutions complementary to hard solutions, (2) mitigating morphological and hydrodynamic changes and (3) ecologically enhancing hard coastal structures. The selection and also the success of these potential adaptations are highly dependent on local conditions, such as hydrodynamic forcing, spatial requirements and socioeconomic factors. The overview provided in this paper aims to offer an interdisciplinary understanding, by giving general guidance on which type of solution is suitable for given characteristics, taking into consideration all aspects that are key for environmentally sensitive coastal designs. Overall, this study aims to provide guidance at the interdisciplinary design stage of nature-based coastal defence structures.

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