AQA Geography Unit 2 - Geography Skills

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  • Geography Skills - River Valency
    • Aim
      • To  investigate whether the river Valency fits the characteristics of the Bradshaw model
        • To investigate whether there is a relationship between velocity and discharge
        • To investigate whether discharge increases as you travel further away from the source of the river
    • Background
      • What are the characteristics of your location
        • The river accurately represents the long profile of a river; there are no abnormalities
          • Steep sided V shaped valleys in the upper course
            • What are the characteristics of your location
              • The river accurately represents the long profile of a river; there are no abnormalities
                • Steep sided V shaped valleys in the upper course
                • 7 tributaries
                • Impermeable rock type
          • 7 tributaries
          • Impermeable rock type
        • What is the location of your study
          • The river Valency is situated in Boscastle, in North Cornwall
        • Why did you choose this study site?
          • It was a short river so we could conduct the fieldwork data in a short amount of time
          • It was close to our school, so we didn't have to travel far
          • It was close to a road/carpark, so we didn't have to carry our equipment far
      • Risk Assessment
        • Slips/trips/ falls
          • Wore suitable footwear
          • Behaved sensibly
          • Worked as a team
        • Drowning
          • Don't go into water above your knee
        • Hypothermia
          • Took a hot drink
          • Wore lots of layers of clothing
        • Weils disease
          • Used gloves in the river
          • Covered up any cuts
          • Didn't drink the water
      • Data Collection
        • Discharge
          • The discharge of a river is the volume of water which flows through it in a given time.
            • To find the discharge, you times the cross sectional area by the average velocity
          • Cross sectional area
            • At each site, measure the width of the river
              • Measure evenly 10 places along the width of the river to measure the depth
      • Data Presentation
        • Graph of cross sectional area
          • Using the figures of the width and depth calculated at each site, plot them on graph paper
          • Easy to produce and it is easy to use to find the cross sectional area. Enables you to see changes in cross profile
            • Doesn't tell you why there are changes in the cross profile
      • Data Analysis
        • Spearman's rank
          • State null hypothess
            • Establish variables (Site location and discharge)
              • Rank variables.
                • Difference squared. Added together.
                  • Put into Spearman's rank equation
      • Conclusions
        • Data collected supported our hypothesis that discharge would increase downstream
          • Spearman's rank coefficient of 0.99
      • Theories
        • The Bradshaw model
          • The Bradshaw Model is a geographical model which describes how a river's characteristics vary between the upper course and lower course of a river
          • River discharge increases as you go downstream

    Comments

    Mr A Gibson

    A good example you can use for the River Valency, or a template you can adapt if you have studied another river.

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