1. Draw a beach profile into your copy. On it show and label: Sand dunes Marram grass Storm beach High and low tide marks.
2. What impact can longshore drift have on coastal erosion? 3. Describe the formation of a sand dune. 4. Match each of the following features with the correct term:
A B C D
Sand spit
Tombolo
Lagoon
Sand dune with marram grass
5. (a) Draw a labelled diagram of one feature of coastal deposition. (b) Explain how that feature was formed by the processes of coastal deposition. (c) Name a location where this feature can be seen on the Irish landscape.
11.5 People and the Sea: Managing Surface Processes
Humans have put many measures in place to defend their coasts from the powerful processes of sea erosion. The following are methods used to defend our coasts against the sea.
Groynes Groynes are concrete or wooden walls or fences that are built out into the sea at right angles to the coast. They work to reduce longshore drift by trapping the sediment carried by waves. The trapped sand builds up the level of the beach.
Example: An example can be seen at Rosslare, Co. Wexford.