Key term
WJEC A-Level Geography 601-8455-3
Coastal Landscapes
Topic overviewThe coast as an open systemSediment sources and sediment cellsTides and coastal currentsConstructive and destructive wavesHigh energy coasts and erosional landscape systemsLow energy coasts and depositional landscape systemsFetch, wave refraction and wave energyLithology and structural geology at the coastSub-aerial weathering and mass movementMarine processes of erosionErosional landforms of rocky coastsCoastal transport and longshore driftDeposition, flocculation and sediment sortingDepositional landforms of sandy coastsSand dunes and aeolian processesEstuaries, tidal flats and salt marshesCoral reefs and mangrove coastlinesCoastal change over different timescalesCoastal processes and human activityHuman impact on coastal landscape systems
Glaciated Landscapes
Topic overviewThe glacier as an open systemClimate change and the glacier budgetGlacier movementTypes of ice mass and their distributionGlacial weathering and erosion processesMacro-scale erosional landformsGlacial transport and depositional landformsFluvioglacial landformsSuites of landforms in glacial landscapesPeriglacial processes and ground icePeriglacial action of water and windGlacial change over different timescalesGlacial environments and human activity
Tectonic Hazards
Topic overviewThe internal structure of the EarthMechanisms of plate movementDivergent and conservative plate marginsConvergent margins and subductionHot spots and the global distribution of tectonic hazardsThe hazard profile and measuring magnitudeTypes of volcano and styles of eruptionPrimary volcanic hazardsSecondary volcanic hazardsImpacts of volcanic activity at different scalesContrasting volcanic eruptionsEarthquake characteristics and seismic wavesEarthquake hazards and ground behaviourTsunami processes and impactsContrasting earthquake eventsRisk, vulnerability and human factorsMonitoring, prediction and warningMitigation, response and the hazard management cycle
Changing Places
Topic overviewWhat gives a place its characterFlows and connections that shape placesMeaning, perception and attachment to placeHow places are representedEconomic restructuring and the Clark Fisher modelDeindustrialisation and social inequalityThe service economy and its impactsThe knowledge economy and clustersRebranding rural placesManaging change in rural placesRebranding urban placesManaging change in urban placesComparing a home place with a contrasting placeHow place change affects people's lives
Water and Carbon Cycles
Topic overviewThe water cycle as a global system and mass balanceGlobal water stores and residence timesCryospheric processes and sea-level changeDrainage basin inputs, stores and outputsFlows within the drainage basinRiver regimes and their controlsStorm hydrographs and hydrograph shapeAir uplift, cloud formation and precipitationExcess runoff and floodingDeficit in the water cycle and aquifer rechargeThe global carbon cycle and its storesCarbon pathways between land and the atmosphereCarbon transfers involving the oceansCarbon stores in biomes and land-use changeChanging carbon stores in peatlandsRising atmospheric carbon and its impactsFeedback within and between the water and carbon cycles
Global Migration
Topic overviewGlobalisation and a shrinking worldClassifying and mapping migrationCauses of international economic migrationConsequences and management of economic migrationRefugee movements and internal displacementRural-urban migration in developing countriesSuperpowers and global hub citiesMigration policy and public debate in the UKManaging refugee crisesInformal settlements in developing cities
Global Governance of the Oceans
Topic overviewSupranational institutions and global governanceLaws and agreements governing the oceansStrategic value of the oceans and maritime securityShipping, cables and illicit flowsSovereignty over ocean resourcesManaging marine environmentsOcean pollution and its managementGovernance across scales: an ocean case study
EcosystemsContemporary theme
Topic overviewThe value of ecosystems to peopleThe distribution of global biomesEcosystem structure, energy flow and productivityNutrient cycling in contrasting biomesMeasuring and threatening biodiversityConserving biodiversitySuccession and local ecosystemsThe Arctic tundra biomeSustainable use of the Arctic tundra
Economic Growth and Challenge: IndiaContemporary theme
Economic Growth and Challenge: ChinaContemporary theme
Development in an African ContextContemporary theme
Energy Challenges and DilemmasContemporary theme
Weather and ClimateContemporary theme
Fieldwork and Geographical Skills
Coastal Landscapes
Fetch, wave refraction and wave energy
- 2 things to know
- AS Unit 1
Overview
Why the south-west coast of Wales receives high energy waves, wave orientation and wave refraction.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
State the three factors that determine the energy of a wave when it reaches the coast.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Define fetch.
Model answer
Fetch is the distance of open water over which the wind blows to generate a wave.
- 2
State the three factors that determine the energy of a wave when it reaches the coast.
Model answer
The strength of the wind, the length of time it has blown, and the fetch over which it has acted.
- 3
Explain why the south-west coast of Wales receives high energy waves.
Model answer
Its fetch extends across the Atlantic for thousands of kilometres in the direction of the prevailing south-westerly wind, so waves arrive fully developed.
- 4
What is wave orientation, and why does it matter?
Model answer
Wave orientation is the direction from which waves approach the shore, and it determines the angle of the swash and therefore the direction and rate of longshore drift.
- 5
Define wave refraction.
Model answer
Wave refraction is the bending of a wave crest as it enters shallow water at an angle, so that the crest becomes more nearly parallel to the shore.
- 6
Explain how wave refraction concentrates energy on a headland.
Model answer
The wave slows first in the shallow water off the headland while the parts in the deeper bay run on, so the crest bends around the headland and its energy is focused there.
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