Coastal management plans have been established to protect natural and man-made features, as well as human life. There are two main aims to coastal management plans:
- To provide defence against water inundation.
- To provide protection against coastal erosion.
Some forms of coastal defence are natural formations, some are man-made, and they can be combined. They fall into two broad groups: ‘soft’ and ‘hard’ defences. Milbank offer the following hard sea defence solutions:
These are usually built from concrete and protect against storm waves by reflecting wave energy. They are normally found in towns or harbours where there are lots of properties or special assets to protect. Storm waves can be very powerful, and defences do get damaged.
A wide beach or salt marsh in front of a sea wall will absorb some of the wave energy and make the walls more effective.
Whether the requirement is complete wave walls or copings to refurbish existing defences, Milbank provide high quality precast concrete blocks to resist natural processes such as wave action and sediment movement.
This is where a facing, such as of masonry, is used to support and protect the seaward slope of sea walls or embankments, along its length. They are designed to absorb, more than reflect wave energy, and to protect the land from wave action.
Most revetments allow water to pass, and in losing some of its energy, deposit materials rather than erode.
Milbank work with the Environment Agency in supplying canewdon blocks which are often laid in grid formation at the toe of the sea wall.