Chesil fieldwork Flashcards
1
Q
what is the theory of beach profiling?
A
- beach profile impacted by wave type- destructive=steep narrow beach, constructive opposite
- indicates LSD
2
Q
step by step beach profile?
A
- mark swash line with ranging pole
- with second pole go to next change in angle of slope
- measure distance between
- clinometer to measure angle
3
Q
justification of beach profile?
A
- stratified sampling
4
Q
limitations of beach profile?
A
- tide
- do we account for every tiny variation
- accuracy
- was one area representative of whole beach
5
Q
theory of stone roundness and angularity?
A
- see sediment size along the beach
- shows if LSD is active through movement of sediment
- high energy coastline=smaller sediment
6
Q
step by step angularity?
A
- pick stones drop on clipboard marked x
- repeat 5 times
- removes human bias/influence
7
Q
limitations of angularity?
A
- not entirely random as size affects bounce
- subjective
8
Q
LSD theory?
A
- shows if LSD active
- shows direction of wave movement/prevailing wind
- throw apple into sea time for 5 mins
- apple at top will react differently to sediment below
- wind influences
9
Q
what was the the aim of fieldwork question?
A
investigation into the changing characteristics of the beach at chesil/ investigation into sediment characteristics between Durdle door and Lulworth
10
Q
what were fieldwork conclusions for beach profiles?
A
- higher energy coastline
- destructive waves active due to steep gradient
- LSD- more sediment to move
- significant changes in gradient
11
Q
what were the conclusions for sediment size?
A
- smaller closer to sea because of erosion and high energy
- smaller sediment not at Chiswell because of Easterly winds
- sediment more rounded at DD=high erosion
- sediment more angular at Lulworth due to it being more sheltered so less erosion from coastal processes
