Physical factors that create a
variety of coastal environments
Competition for Coasts
Physical factors that create a variety of
coastal environments
A. Land
1. Resistance of the rocks – GEOLOGY
Different rock...
Physical factors that create a variety of
coastal environments
A. Land
2. Relief
• Relief provides sheltered inlets and na...
Physical factors that create a variety of
coastal environments
A. Land
2. Relief
Physical factors that create a variety of
coastal environments
A. Land
3. Presence or lack of beach
Sand dunes, shingle be...
Physical factors that create a variety of
coastal environments
A. Land
4. River sediments
Rivers carry vast quantities of ...
Physical factors that create a variety of
coastal environments
B. Sea
1. Coastal (marine) ecosystems
• Mangrove swamps and...
Physical factors that create a variety of
coastal environments
B. Sea
2. Wave energy and direction
• Waves can have huge i...
Physical factors that create a variety of
coastal environments
B. Sea
3. Size and type of waves
Larger waves clearly cause...
Physical factors that create a variety of
coastal environments
B. Sea
4. Local Currents and Long Shore Drift
Long shore dr...
Physical factors that create a variety of
coastal environments
B. Sea
Physical factors that create a variety of
coastal environments
C. Weather and Climate
Physical factors that create a variety of
coastal environments
C. Weather and Climate
1. Wind strength and direction
Onsho...
Physical factors that create a variety of
coastal environments
C. Weather and Climate
2. Rainfall and temperature
Theses f...
Physical factors that create a variety of
coastal environments
C. Weather and Climate
3. Storms surges
Storms surges resul...
Homework
• Find a photo of a coastal area and on it label
at least 6 different factors that shape that
area, e.g. Relief, ...
L1 ap 2013
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L1 ap 2013

  1. 1. Physical factors that create a variety of coastal environments
  2. 2. Competition for Coasts
  3. 3. Physical factors that create a variety of coastal environments A. Land 1. Resistance of the rocks – GEOLOGY Different rock types will create different landforms. E.g. Resistant Chalk and weaker limestone at Purbeck.
  4. 4. Physical factors that create a variety of coastal environments A. Land 2. Relief • Relief provides sheltered inlets and natural harbours, e.g. Hong Kong Bay.
  5. 5. Physical factors that create a variety of coastal environments A. Land 2. Relief
  6. 6. Physical factors that create a variety of coastal environments A. Land 3. Presence or lack of beach Sand dunes, shingle beach or sand beach will all help to protect the land from erosion. E.g. Beesands, Devon. A lack of a beach will clearly increase rates of erosion.
  7. 7. Physical factors that create a variety of coastal environments A. Land 4. River sediments Rivers carry vast quantities of sediment to the mouth. Once they meet the sea it is often deposited in the form of a delta. This adds to the coast and allows space for development as well as protection for the land. E.g. Nile Delta.
  8. 8. Physical factors that create a variety of coastal environments B. Sea 1. Coastal (marine) ecosystems • Mangrove swamps and coral reefs all help to protect the land behind it. These ecosystems therefore protect the coast, especially from topical storms as they are found in tropics!
  9. 9. Physical factors that create a variety of coastal environments B. Sea 2. Wave energy and direction • Waves can have huge impact on erosion and therefore shaping the coast. The larger the fetch the more erosion. Compare Cornwall (……….. Fetch) to Suffolk (……….. Fetch) .
  10. 10. Physical factors that create a variety of coastal environments B. Sea 3. Size and type of waves Larger waves clearly cause more erosion than smaller ones. Destructive waves have …………. Swash and a ……. backwash. These waves cause more damage than constructive waves ( ………… swash and ……….. backwash)
  11. 11. Physical factors that create a variety of coastal environments B. Sea 4. Local Currents and Long Shore Drift Long shore drift transports material along the coast. Clearly areas where LSD takes place means that there will be a small and temporary beach. Can increase the rate of erosion.
  12. 12. Physical factors that create a variety of coastal environments B. Sea
  13. 13. Physical factors that create a variety of coastal environments C. Weather and Climate
  14. 14. Physical factors that create a variety of coastal environments C. Weather and Climate 1. Wind strength and direction Onshore winds will create more erosion than offshore ones. Also strengths can play an important role in the tropics, e.g. hurricanes.
  15. 15. Physical factors that create a variety of coastal environments C. Weather and Climate 2. Rainfall and temperature Theses factors can influence weathering rates. E.g. slumping or biological weathering.
  16. 16. Physical factors that create a variety of coastal environments C. Weather and Climate 3. Storms surges Storms surges result from hurricanes. They can damage coastal areas over long periods of time. The damage from hurricane Sandy was due to a storm surge.
  17. 17. Homework • Find a photo of a coastal area and on it label at least 6 different factors that shape that area, e.g. Relief, high land that stops erosion from being too rapid
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