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Hengistbury Head Fieldwork (Geography Theory (Hard engineering (Man-made…
Hengistbury Head Fieldwork
Key Question
How Successful are the Groynes at Hengistbury Head?
Geography Theory
Hard engineering
Man-made things to defend against Longshore Drift
Longshore Drift
Transport of sediment along the coast caused by waves
Method (Beach Profile)
Description
Using 2 ranging poles, a measuring tape and a clinometer put the 2 ranging poles at points 0 and 2 on the beach. Record the angle of the beach using the clinometer. Then repeat at 2m intervals up the beach until you have a suitable pieces of data. Repeat at different locations across the beach as well.
Sampling method
Systematic as we had pre planned areas along the beach to go to to collect our beach profile data
Assessment of Data presentation method (Line Graph)
Positive:
1. Can plot multiple beach profiles on one graph.
Can easily compare between the beach profiles
Negative:
Can become cluttered when too much information is put on one graph
Trends in results
Beaches were mostly constructive beaches as they have a shallow incline on the beach
The profile at Warren Hill is anomalous as it showed it to be a destructive beach which contrasted our other beach profiles.
Conclusions
Our beach profiles can show us that the groynes at Hengistbury Head are working as they are trapping sediment causing constructive Beaches. The gradient at different points on the graph are usually shallow however except from the Warren Hill profile.
Evaluation
A problem with the method was that the beach profiles only showed the gradient of the beach and whether a beach is constructive or destructive. Also a limitation is that we cannot compare with a beach, like at Barton-on-Sea, which does not have the coastal management Hengistbury Head has. My conclusions are reliable as they mostly replicate the secondary data online.