Sometimes, fully 'green solutions' are not feasible due to high wave energy and/or limited space. Here, green-gray hybrid solutions may form an interesting alternative. In addition to a traditional dike, vegetated foreshores can help to reduce wave height and stabilize the sediment. Under certain conditions the dike’s crest can even be designed lower than in a traditional design due to the wave-attenuating effect of the foreshore. In addition, the ecological value of grey infrastructure can be improved by slightly adapting them to form a habitat for a variety of plants and animals. These 'nature-enriched structures' or 'rich revetments' are applied in harbours as well as along sea dikes.
|Foreshores in freshwater environments||Rich revetments||Rich structures|
Hybrid solution to replace the traditional 'hard-cover' design. Vegetated foreshores in freshwater environments have the ability to reduce wave impact, provide en enhance the natural value.
This concept aims to create biodiverse habitats
in the intertidal and subtidal zone of hard structures
such as seawalls and harbours.
Rich structures are small-scale structures that provide habitat for organisms. Examples are floating marshes and pile and pontoon hulas. The structures are easy to apply and suitable even when available space is limited.