Coasts

Coasts

Coastal environments
1. Salt marsh
  1. Formation
    1. Mud and silt accumilate in a sheltered part of the coast, which leads to more deposition making mudflats. Salt tolerant plants, pioneer plants (cordgrass) colonise. Roots hold the mud together. Mud levels rise so they are less frequently covered by water. Rainwater washes salt away and the environment becomes less harsh. More plant species colonise (vegetation succession).
  2. Profile
  3. Keyhaven Marshes
    1. Flora and fauna
      1. Cordgrass, sea lavender, oyster catcher, ringed plover, Wold spider
    2. Management
      1. Prevent trampling, parking and pollution
      2. Rock armour and beach nourishment on spit
    3. Importance
      1. SSSI
      2. RIch biodiversity
      3. National Nature reserve
    4. Threats
      1. Increasing tourism
      2. Rising sea levels breach spit
    5. Location
      1. Formed in the lee of Hurst Castle Spit
      2. 500 acrea
  4. Definition
    1. Areas of periodically flodded low lying coastal wetlands
Erosion
1. Types
  1. Hydraulic action
  2. Abrasion
  3. Attrition
  4. Solution
2. Landforms
  1. Headlands and bays
  2. Cliff retreat
  3. Arches, stacks, stumps
Deposition
1. Landforms
  1. Spits
  2. Bars
  3. Tombolo
Management
1. Hard engineering
  1. Sea wall
  2. Gabions
  3. Revetments
  4. Groynes
  5. Rip rap
2. Soft engineering
  1. Beach nourishment
  2. Managed retreat
Waves
1. Constructive
2. Destructive
Weathering
1. Chemical
2. Biological
3. Physical
Transportation
1. Longshore drift
2. Traction
3. Saltation
4. Suspension
5. Solution
Mass movement

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	Created by Hannah Sargent7281 almost 10 years ago