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A Brief Discussion About Rock Revetment Wall

Rock revetments can be used to prevent erosion by protecting the dune faces. If well-designed and maintained, they dissipate storm waves' energy and help prevent further erosion of the backshore. Revetments can be either carefully designed structures that protect long shorelines or rip-rap that protect short, severely eroded sections.

Function

In areas where there is significant erosion and it is economically unfeasible to use seawalls, rock revetments are a popular choice. Rock revetment walls reduce the destructive power of waves through wave energy dissipation within the revetment's interstices.

You can also make permeable revetments from gabions, timber, and concrete armor units. Concrete units are usually too expensive to be used as dune protection, but they may be suitable for protecting high-value backshore assets and armor rocks. Concrete units are more attractive than rock.

Safety hazards can be created by large rock revetments that are placed in public areas. The rocks should be scattered randomly in order to create a rough surface with large gaps. This will increase hydraulic efficiency.

If revetments are not maintained and extended, they may not be able to prevent shoreline recession. The rock revetment can become less effective as a defense structure if the foreshore continues to erode. However, it will not collapse completely. To maintain backshore protection to the design standard, repairs and extensions may be required.