![]() ![]() In the long term it is more sustainable than spending large sums of money trying to protect it. It allows natural processes to take place. Disadvantages- can be unsightly if fences become broken, regular maintenance needed especially after storms Managed retreat Allows the sea to flood or erode an area of relatively low value land. Costs- £400-£2000 per 100m Advantages- Minimal impact on natural systems, can control public access to protect ecosystem. ![]() The new dunes help to protect the existing dunes. Answer the Exam question Dune fencing Fences are constructed on a sandy beach along the seaward face of existing dunes to encourage new dune formation. Homework Go through and highlight important information. Disadvantages- needs constant maintenance. Costs- up to £500,000 per 100m Advantages- Relatively cheap and easy to maintain, blends in with existing beach, increase tourist potential. The sediment is normally found offshore and transported by barge. Beach nourishment It is where additional sand or shingle is added to an existing beach to make it higher and wider. Disadvantages- Time-consuming to plant the marram grass and fence it off, people don’t always respond well to being prohibited from the planted areas, storms can damage them. Costs- £200-£2000 per 100m Advantages- maintains a natural coastal environment, cheap. Fences can be placed to protect the dunes. Marram grass can be planted to stabilse dunes. Marram grass can be planted to stabilse."- Presentation transcript:ġ Dune regeneration Sand dunes are effective buffers to the sea but are easily damaged and destroyed by trampling. Presentation on theme: "Dune regeneration Sand dunes are effective buffers to the sea but are easily damaged and destroyed by trampling. ![]()
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