lynmouth flood 1952 itâ€™s going to be a very wet tale
Post on 30-Dec-2015
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LYNMOUTH FLOOD 1952
its going to be a very wet tale
setting the scene ILynmouth is situated on the North Coast of Devonso where is this Lynmouth place?
oh, so thats where all the action is going to take place!!
setting the scene II:August of 1952 was extremely wet
the ground had become saturated
on the evening of August 15th 230mm (23cm) of rain fell in a freak stormlasting 14hours (over 3000million gallons of water)
Immediate surface run-off causing a flash floodwhat were the CAUSES of the flood?
Im singing in the rain, Im singing hang on its getting very wet here!
Impermeable (water cant soak in) rocks mean increased run-off
Steep river gradient & small drainage basin & narrow river valleyssetting the scene III:yep you guessed it, more CAUSES
The River Lyn had been narrowed and diverted - to build hotels & stuff!
hmm good idea? let me think
The narrow arch of the river became blocked & the river flowed down the main street following the easiest path
the impactsthis is all pretty serious stuff
34 people killed & 90 houses/hotels destroyed & 130 cars/19 boats destroyedOver 100,000 tonnes of boulders left in the main street one boulder found in the basement of a hotel weighed 7.5 tonnesRocks of 10m3 moved by traction
River takes natural route (same as flood)
Floodplain left to take water
Larger & wider bridges
Where hotel was is now open
Channel has been straightened to allow water to flow away more quickly
Lynmouth Todayphew! glad they did somethingoh! one last thing!