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Level 3 Geo Muriwai - Interactions
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Level 3 Geo Muriwai - Interactions

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Info to complete pages 38 - 42 of the muriwai workbook.

Info to complete pages 38 - 42 of the muriwai workbook.

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  • 1. INTERACTION/LINKS BETWEEN COMPONENTS OF THE ENVIRONMENT Pages 38-40
  • 2. MURIWAI BEACH AS A SYSTEM  The elements, processes and features of an environment do not exist alone.  They are all connected in some way in a series of inputs, processes, outputs and feedback which links back to the beginning  For this reason, we can identify the beach as a SYSTEM
  • 3. SYSTEM DIAGRAM PG 38 INPUTS PROCESSES OUTPUTS FEEDBACK
  • 4. SYSTEM DIAGRAM PG 38 INPUTS • Waves • Sediment • Rock type • Vegetation • Wind • Temperature PROCESSES • Wave erosion • Wave transportation (LSD) • Wave deposition • Aeolian action OUTPUTS • Headland • Beach • Dunes • Stack • Cave • Arch • Blowhole • Wave cut platform FEEDBACK • Energy • Sediment • Changed topography of land
  • 5. QUESTION TIME  As all are connected any change in an any one factor will change the rest of the beach system over time.  What changes could happen at Muriwai if the prevailing wind was to change to the east?
  • 6. EASTERLY WIND EFFECTS  LSD wouldn’t occur as readily  Waves would be lower energy, less wave erosion  Sand will blow off sand dunes, more blowouts possible  Saltation wouldn’t occur as frequently, possible decrease in heights of dunes over time  Any others?
  • 7. INTERACTION AT MURIWAI PG 39  Interaction at Level 3 is defined as how the components (wind, waves, rock etc) affect each other.  Interaction can take place at different scales (small vs big) and with vary degrees of intensity.
  • 8. FOR EXAMPLE WAVES ROCK  Waves Rock The energy of a wave erodes the rock over time  Rock Waves The type of rock can reflect waves and dissipate (break down) the energy of waves
  • 9. NOW YOU TRY…..  In the space on page 38, write sentences to explain how VEGETATION and SEDIMENT interact
  • 10. VEGETATION SEDIMENT  Vegetation creates areas of zero wind velocity at their roots so sediment is deposited here  Sediment type and amount determines the type of vegetation that is able to grow
  • 11. OTHER INTERACTIONS  At the bottom of page 39, draw a diagram that shows the interaction of different processes in your geographic environment  Think about…..  What processes operate at Muriwai?  Can you group these together?  What is the best way to show an interaction in a diagram?  Are some interactions between processes more important or obvious than others?
  • 12. INTERACTION OF PROCESSES PG 40  Often what is produced (the output) from one process working is what provides the input for another process to work. WAVE EROSION AEOLIAN ACTION Wave erosion produces some of the sediment at Muriwai that is available for saltation. Without wave erosion the amount of sediment would be reduced. At the same time, saltation removes the sediment when it blows onshore away from the influence of the waves. This means that the waves cannot pick up the sediment and use it for the process of corrosion on Otakamiro Headland.
  • 13. SALTATION LONGSHORE DRIFT  Now you do one in the space provided on page 40 for how the processes of saltation and longshore drift impact one another.  Remember, this means you need to say how saltation affects LSD AND how LSD affects saltation  Bonus marks if you can provide 4 relevant pieces of specific information from the Muriwai environment in your paragraph answer.