Coasts
- Created by: Sailing26880
- Created on: 17-05-18 18:02
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- Coasts
- Inputs
- Marine - tide, waves, storm surges
- Atmospheric - Weather/ climate, climate change, solar energy
- People - Human Activity, and coastal management
- Atmospheric - Weather/ climate, climate change, solar energy
- Marine - tide, waves, storm surges
- Processes
- Weathering, Mass movement, Erosion, Transport, Deposition
- Outputs
- Erosional Land-forms, Depositional land-forms, different types of coasts
- Classifying Coasts
- Geology, Energy Levels, Balance, Change in Sea level
- No system or Coast is definitive
- Geology, Energy Levels, Balance, Change in Sea level
- Morphology
- Strata - layers of rock
- Bedding Planes- Horizontal
- Joints - vertical
- Folds - formed by pressure
- Faults - slips along fault planes
- Dip - angle at which strata lies
- Faults - slips along fault planes
- Folds - formed by pressure
- Joints - vertical
- Bedding Planes- Horizontal
- Strata - layers of rock
- Concordant, Parallel to sea, same rock type
- Discordant, Perpendicular creating headlands and bays
- Dalmatian, formed due to a rise in sea level, Volcanoes and Valleys
- Haff, long spits of sand parallel
- Constructive waves = small
- Destructive waves = big
- Further the ocean, the larger the pebble
- Hydraulic Action - compression of air, causing cracks
- Abrasion - base of cliff is eroded due to sediment load
- Corrosion - chemical erosion
- Attrition - rock vs rock, gets smaller each time
- Corrosion - chemical erosion
- Abrasion - base of cliff is eroded due to sediment load
- Headlands, Bays, Cliffs, Stack, Stump, Shoreline Platform, Wave cut Notches, Caves
- Spits, Offshore bars, barrier beaches, tombolos, cuspate forelands
- Swash Aligned, perpendicular waves / Drift Aligned, waves parallel to beach
- Weathering
- Mechnaical -freeze thaw, salt, wetting and drying
- Biological - plant roots, Burrows, water becoming acidic
- Chemical - acid rain = calcium carbonate
- Biological - plant roots, Burrows, water becoming acidic
- Mechnaical -freeze thaw, salt, wetting and drying
- Long Shore Drift
- Mass movement, soil creep, soil fluctuation, earth and mud flows, rock slides, rock falls, slumps
- Eustatic - global, Isostatic - local
- Holderness
- boulder clay, chalk bands, small fetch but large swell causing destructive waves
- Bangladesh
- Storm Surge, upto 6 m 2007
- Groynes, Rip Rap, sea walls, reventments, offshore breaker
- Beach Nourishment, Cliff regeneration and drainage, Dune Stability, Marsh creation
- ICZM look at whole area of coast rather then just local area
- Weathering - breaks material
- Erosion - transports material
- Inputs
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