Processes of transport and deposition 1.1.6

what % of the worlds coastline are depositional

20%

depositional landforms that occur in an esturary

salt marshes and mud flats 

what is an estuary

where the river inputs sediment into the system

how does a low energy environment lead to the formation of a beach

constructive waves coming into the coastline have low energy and when it reaches an area with a shallow gradient is loses more energy and so cant carry the sediment anymore and deposits it

what is a store

a temporary store of sediment

what is a sink

the sediment will permanently be there

traction

large boulders and rock are rolled along the river bed

saltation

small pebbles and stones are bounced along the river bed 

suspension

fine light material is carried along by the river

solution

minerals are dissolved in the water, this is a chemical change

long shore drift

• waves approach the beach at an oblique angle due to prevailing wind

• sediment is carried up the beach at the same angle due to the swash power 

• gravity pulls waves back down at a 90 degree angle

• it repeats moving sediment along the beach and long term sediment will accumulate especially around an obsticle

what are 4 features of a low energy environment

• beaches that are swash aligned

• drift aligned beahes

• sand dunes

• mud flats 

what is a swash aligned beach

they form when waves break parallel to the coast

what is a drift aligned beach

form when LSD moves material down the coast

what is stokes law

as particle size increases so does the energy needed to move the particle

what is flocculation

the idea that clay is sticky and so the particles of it stick together and you can never move just one particle, so it affects velocity

what does the hjulstrom curve show

as size increases so does energy needed except for clay

what are some examples of micro features

• rip channel 

• rock pools

• sand ripples

where are micro features found

in the foreshore section of the beach (in between on and off shore)