holderness coast Flashcards
(7 cards)
where is the holderness coast
north east england - yorkshire
stretches from flamborough head to spurn point
what happens at flamborough head
made of chalk resistant to erosion
wave cut platform present - Selwicks bay
what happens at spurn point
spit formed from material transported down the coast in a southerly direction by longshore drift
5.5km long
stretches out into the humber estuary
background
fastest eroding coastline in the uk
2m erosion per year due to strong prevailing winds creating longshore drift moving material south along the coastline
cliffs made of soft boulder clay which erodes rapidly if saturated
what happened in mappleton to prevent erosion
two rock groynes built - 2 million
preventing longshore drift moving material
worked at mappleton but caused erosion along the cliff to increase considerably as sediment cant move on
what happened in easington to prevent erosion
major gas terminal which needs protecting
rock armour built consisting of large granite boulders
expensive but long lasting
what happened at hornsea
wooden groynes built to prevent longshore drift trapping sand and protecting cliffs
successful at hornsea but increased erosion at mappleton
beach nourishment used to add more sediment to the beach but needs to be redone every two years