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Outline the role of waves in the transportation of sediments at the coast - AQA - A-Level Geography - Question 3 - 2021 - Paper 1
Question 3
Outline the role of waves in the transportation of sediments at the coast. Extra space
Worked Solution & Example Answer:Outline the role of waves in the transportation of sediments at the coast - AQA - A-Level Geography - Question 3 - 2021 - Paper 1
Step 1
Constructive waves and sediment deposition
Answer
Constructive waves tend to bring sediments onto the beach. This occurs due to their low energy nature, characterized by low frequency, height, and limited backwash. The gentle swash associated with these waves plays a significant role in moving materials from the water onto the shore.
Step 2
Destructive waves and sediment erosion
Answer
Destructive waves are known for removing sediments from beaches and coastlines. They exhibit higher frequency and energy, which allows them to impact the shoreline more powerfully. These waves can transport materials back to the sea or deposit them at offshore zones, depending on their dynamics.
Step 3
Longshore drift and sediment transport
Answer
The phenomenon of longshore drift involves the gradual movement of sediments along the coast due to wave action. When waves approach the shore at an angle, they lead to a process where sediments are moved laterally along the coastline. This mechanism is critical for the redistribution of materials along coastal areas.
Step 4