Analysing and interpreting data

Analysing fieldwork data

Analysis involves describing results in each graph or resource.

• Describe what data was used to help create the graph.
• Quote figures. What are the highest result/ lowest results?
• Describe any patterns or trends.
• What are the relationships that the graph presents?

Interpreting fieldwork data using knowledge of relevant theory and/or case studies

Data interpretation involves explaining the different reasons for the results/graphs that have been presented.

Explain the patterns and trends in the information and:

• Go back to the hypothesis that is being tested.
• Explain the results that help to either support, prove or disprove the stated hypothesis.
• Refer to particular geographical theory and specifically note the role that the theory might have played in linking with the hypothesis.

Identifying anomalies in the fieldwork data

Describe and explain the potential reasons for any unusual results.

Hyp 1: The cross-sectional area of the Glenarm River decreases as you move upstream

Data Analysis

• Graph 1 shows the average channel depth as you move downstream.
• The graph clearly shows that the average channel depth actually decreases as you move further upstream.
• Site 4 is found high up in the upper course of the river and has an average depth of 0.21m whereas the deepest part of the river is found at Site 1, in the lower course where the depth is 0.62m on average.

Data Interpretation

• Graph 1 shows that part of the depth measurements that help make up the cross-sectional area of the river are decreasing as we move upstream.
• The amount of water in the river increases closer to the mouth of the river (site 1).
• Geographical theory: Attrition, Hydraulic Action, Corrasion and Solution all work to different levels to increase the width and depth of the river channel.
• There is a lot more water in the river by the lower course (site 1). There will be more potential for abrasion and hydraulic action which will continue to increase the cross-sectional area at this point.
• At site 4 in the upper course, there is much less water so the erosion will usually only be eroding down and not across.