An old page, but still valuable....
Using the textbook: 'Landform Systems' 2nd Edition - by Bishop and Prosser
Answer the following questions:
Read pp. 59-64 for Q1-4
1. Starting inland and working out to sea, put these different zones in the correct order:
Breaker Zone, Backshore Zone, Offshore zone, Swash Zone, Surf Zone
2. Define the following terms in as much detail as possible:
3. Outline the reasons for headlands being eroded more rapidly than bays on a stretch of coastline.
4. Explain the difference between spring tides and neap tides
Read pp. 64-67
5. What is meant by the term ballistic impact, and how does it contribute to coastal erosion ?
6. Sediment is a vital part of the coastal system, and a beach is the best form of protection. Produce a bullet pointed list using Fig 4.15 to show the main sources of sediment to the coastal system
SEA DEFENCES
The defences above are placed at East Runton, around the coast from Cromer, Norfolk. They are placed on the beach, usually towards the back, close to (about 15m away from) the base of the cliffs, which are prone to collapse. They are wooden, and the wood has to be a tropical hardwood or equivalent (which could be the basis for objections to their usage..) For that reason the wood used tends to be jarah wood from Australia, or greenheart from Africa. It is designed to break the waves so that when they reach the cliffs, most of their energy has been dissipated. They can appear rather ugly on the beach, and also form a barrier to people - they often need a stile to get over, which can prevent some people from gaining easy access to the beach. They cost upwards of £500 per metre, but wouldn't last as long as structures such as promenades with curving sea walls. They tend to get damaged by corrasion, and could be scoured at the base.
