Coastal Enviroments notes (complete)

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  • Created on: 05-09-13 15:06
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Waves
Erosion- Weathering Coastal Transport
the wearing away of the land This is the breakdown of rocks INSITU. This This is the movement
ing agents such as the sea (in means that the rock structure is weakened by of material along a
se), rivers, wind, glaciers etc. elements of the weather but the rocks remain coastline. Sediment
re several types operating at where they are. The weakened rocks may later can be moved by 4
the coast including: be moved by mass movement processes. There basic processes:
are 3 types:
aulic action - this is where Chemical - this involve the chemical alteration Traction - where
from a wave enters cracks in of the structure of rocks, processes include large stones are rolled
f face, compresses air within carbonation (were weak carbonic acids attack along the sea bed
cks and causes pressure to be rocks) and hydration (where water swells the
ed on the surrounding rock, structure of rock) Saltation - where
h weakens and breaks off. stones are bounced
along the sea bed in a
hopping motion
Suspension - where
fine material is held
within the water mass

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Biological - these processes involve living Solution - where
act with certain rocks types at things such as burrowing animals and plants rocks and minerals are
st and cause them to dissolve attacking rocks and weakening their structures. dissolved within the
this is particularly important water.
mestone and chalk coastlines.…read more

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CAVES Arches Stacks
A cave is formed when waves exploit The breaking wave may trap air inside the The base of the arch is attack
weaknesses (such as joints, faults and cave. waves. The top of the arch is
bedding planes) in the cliff face. attacked by weathering proc
This compresses the air and increases the such as carbonation if it is ma
It is by the processes of abrasion, pressure on the roof, back and sides of limestone.…read more

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Coastal Landforms of Deposition
Concordant and Discordant Coastlines…read more

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Why some coasts need protecting
Methods of Protection
Hard Engineering Advantages Disadvantage
Sea Walls They provide strong Waves in storm conditions may break
protection to the land over them.
These are massive concrete structures which may immediately behind the
either be straight or curved (a 'bull-nose sea wall') wall. They are expensive to build and
maintain.…read more

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Soft Engineering
Sand Dunes Beach Replenishment. Managed Retreat
Sand dunes such as those at Studland Bay are an This is carried on The final response is to do nothing.
effective form of defense against storm waves. numerous beaches, the The costs of resisting the sea are
Studland is a very popular destination for tourists beaches at Weymouth sometimes questionable, especially if
and the dunes are easily eroded by people walking and Lyme Regis being but the defenses are only protecting
and riding bikes on them.…read more

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It provides a framework
for managing and
reconciling the various
groups that have an
interest in how the coastal
zone is managed
Types of Activities Attracted to Coastal Areas
Conflicts between Land Uses
Management Challenges Associated with Coastal Development…read more

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Shoreline Management Plans (SMP)…read more

Comments

Mr A Gibson

The clue is in the title "complete" - a really well presented and attractive (you will want to read them!) set of notes. Use these to make your own notes from (add your own case studies) or just use them to read through. Great!

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