Coasts: Processes, Erosion & Management — GCSE Geography Revision

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What is Coasts: Processes, Erosion & Management?

Coasts are shaped by marine processes, including erosion, transportation, and deposition. The main types of coastal erosion are hydraulic action, abrasion, and attrition, which create landforms like cliffs and wave-cut platforms. Longshore drift is the key process of transportation, moving sediment along the coastline. Coastal management strategies can be 'hard engineering' (e.g., sea walls, groynes) or 'soft engineering' (e.g., beach nourishment, managed retreat).

Board notes: AQA, Edexcel, and OCR all require students to understand coastal processes and management. Exam questions frequently ask for an evaluation of the costs and benefits of different management schemes, often using a specific case study like the Holderness Coast.

Worked example

Common mistakes

• 1Confusing constructive and destructive waves. Constructive waves have a strong swash and weak backwash, building up beaches. Destructive waves have a weak swash and strong backwash, eroding beaches.
• 2Thinking longshore drift moves in one direction all along the UK coast. The direction of longshore drift is determined by the prevailing wind direction, which varies in different parts of the country.
• 3Assuming hard engineering is always the best solution. While effective at protecting a specific location, hard engineering is expensive, visually intrusive, and can cause unintended erosion further down the coast (terminal groyne syndrome).

Coasts: Processes, Erosion & Management exam questions

Exam-style questions for Coasts: Processes, Erosion & Management with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel and OCR specifications.

Frequently asked questions

• What is longshore drift?

  Longshore drift is the process that moves sand and shingle along the coastline. Waves approach the beach at an angle (swash), and then the water returns directly back to the sea (backwash), resulting in a net zigzag movement of sediment along the coast.

• What is the difference between hard and soft coastal management?

  Hard engineering involves building artificial structures to control erosion, like sea walls and rock armour. Soft engineering works with natural processes to manage erosion, such as beach replenishment (adding more sand) and dune stabilisation.