Minehead= INTENTIONAL HUMAN ACTIVITY Flashcards
what management strategies are being used and where?
- MANAGE REALIGNMENT at Gore Point (already slated marshes and fairly low value land)
- also at gore point long term, not important in short earn but will have massive effects in Butlins in LT
-NOTHING at Selworthy cliffs as no settlements behind + cliffs act as a natural barrier
Management at minehead?
To maintain and improve defences-> high value/populated land vulnerable as made of mudstone=>
ROCK ARMOUR: breaks wave energy and affects harbour usage
CURVED SEA WALL: 0.6m expensive/large scale/ increases backwash strength so could remove beach during a storm event
BEACH REPLEMISHMENT: 2m buildup, debate of sign. as have to keep doing but means waves break further offshore
GROYNES: 4 rock groynes to build up shoreline and decrease flood risk to Minehead (trap sediment from LSD)
RIP-RAP: cheaper defence as land here not that important
Problem with groynes?
Terminal groyne to east starves area in from of golf course if sediment => vulnerable to erosion -> Butlins
inputs in Minehead
NO FLUVISL
very small erosion from resistant cliffs
marine inputs from west
outputs in minehead
backwash from sea wall
destructive waves during storm events
effect of impacts on processes and flows?
-during construction, damage to beach where large amounts of sediment are removed=> retreats beach -> PFL AND DECREASED SEDIMENT BUDGET as have to keep rebuilding
- marine inputs vary daily
-most sediment supply=RELICT where static change occurred last ice age
Impacts to coastal landforms
CAUSES CHANGES TO GEOMORPHIC PROCESSES => DISTURBS SYSTEMS BALANCE.
socio-economic profile f Minehead relied in Butlins: popular all year round/main input of income/key tourist attraction leads to JOBS and POSITIVE MULTIPLIER EFFECT
-human activities decrease sediment supply, beach becomes wider and flatter=> less effective at absorbing waves=> easier to erode all landforms eg dunes
