AQA Geography Unit 2 - Geography Skills
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?- Created by: Thomas J Betambeau
- Created on: 22-03-13 14:37
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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
- To investigate whether the river Valency fits the characteristics of the Bradshaw model
- 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
- Steep sided V shaped valleys in the upper course
- 7 tributaries
- Impermeable rock type
- The river accurately represents the long profile of a river; there are no abnormalities
- What are the characteristics of your location
- Steep sided V shaped valleys in the upper course
- 7 tributaries
- Impermeable rock type
- The river accurately represents the long profile of a river; there are no abnormalities
- 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
- What are the characteristics of your location
- 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
- Slips/trips/ falls
- 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
- At each site, measure the width of the river
- The discharge of a river is the volume of water which flows through it in a given time.
- Discharge
- 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
- Graph of cross sectional area
- 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
- Difference squared. Added together.
- Rank variables.
- Establish variables (Site location and discharge)
- State null hypothess
- Spearman's rank
- Conclusions
- Data collected supported our hypothesis that discharge would increase downstream
- Spearman's rank coefficient of 0.99
- Data collected supported our hypothesis that discharge would increase downstream
- 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
- The Bradshaw model
- Aim
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