human intervention in coastal landscapes Flashcards
what is coastal managements main 2 aims
-to provide against, and mitigate the impacts of flooding
-to provide protection against, and mitigate the impacts of coastal erosion
name 4 hard engineering strategies
-sea walls
-rock amour
-gabions
-revetments
-groynes
are hard engineering strategies short or long term
long term
disadvantages of hard engineering
structures and be expensive to build and maintain
defence in one area can have serious consequences further down the coast
structures can be seen as eyesores
how many strategies does Heysham and Morecambe have
5
what is in strategy 1 at Morecambe
rock armour to enhance and protect the existing sea wall boulders were locally sourced limestone
what is in strategy 2 at Morecambe
10 breakwaters and rock groynes were built at intervals Infront of the town used just under a million tonnes of local limestone
what is in strategy 5 at Morecambe
concrete revetment and sea wall to the west of Heysham Head extending to the power station were repaired
what are Morecambe bays classifications
Site of special scientific interest
special area of conservation
how was the strategies carbon footprint reduced in Morecambe
by using local quarries
how many tonnes of sand were used in Morecambe for beach nourishment
89,000
what is soft engineering
uses the natural systems for coastal defence. it involves manipulating and maintaining these systems without changing there fundamental structure
name 3 types of soft engineering
-beach nourishment
-dune regeneration
-managed retreat
how large is Seftons’ dune area and how fast is it eroding
17km large and being eroded at 4.5m/year
why does Formby attract visitors
beaches, sand dunes, pine forests, and local populations of rare red squirrels