We went top Folkestone beach to investigate how and why the beach changes along a stretch of coastline. We took tape, ruler and a clinometer to measure the gradient and pebble size. We also classified one square meter of pebbles into colours to work out the beach origins.
We used a clinometer to measure the pebble size. We did this 5 times which is called systematic sampling. The beach gradient used stratified sampling because we collected a measurement whenever the beach gradient changed.
The theory we were testing was that beach material size will decrease from the top of the beach due to attrition and that it will also get rounder. Pebble beaches will be steeper and wave action will create berms. Long shore drift brings material from different locations to the beach.
Back at school we presented our data in different ways. We drew a scatter graph for beach material size, we drew pie charts to show beach origins and we drew beach profiles to show beach gradients.
In conclusion we were able to agree with our hypotheses as beach material size did decrease and pebbles near the shore were rounder due to attrition. The beach size was steep and there was evidence of berms caused by wave action. There was a wide variety of material which was brought by long shore drift.