Coastal Erosion at Dawlish Warren


Following in the footsteps of previous year 6 pupils, the current cohort set off to Dawlish Warren to find out more about the impact - both negative and positive - that humans are having on the physical geography there. Having watched a slideshow to learn about the structure of the beaches, spit and the dunes, pupils looked at pictures of different sea defences being used to ensure that the beach keeps its sand. These included gambions, groynes, curved sea walls, walls with holes in to disperse some of the energy of a powerful sea and the use of a built structure in the sea to take some of the energy before it hits the beach.

Stephen Edwards taught the children through practical activities to consider the impact of salt, water and wind on eroding coastlines. Outside, they were shown a model of a cliff face and were asked to predict which house was in the safest position before the cliff was hit by a series of waves which caused the cliff to crumble and people's homes to topple, quite dramatically into the sea. 

With this in mind, we were off to the beach to experiment with building our own defences. Each of five groups were tasked with building a different type of defence to save a castle built behind it. Water was then thrown with some force to see how secure the defences were.

Great fun and lots of lovely learning was had by all!



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