UKs physical landscapes Flashcards
Solution
Soluble materials are dissolved in the water and transported
Happisburgh case study
frequented coastal erosion
groynes, rock armour, beach nourishment
left to its own devices
Boscastle, Cornnwall case study
drainage basin made of impermeable rock
£10 million flood defences
widened the river
tree management
August 2004
Suspension
Tiny particles like clay are picked up and carried downstream by force of the water
Ox-bow lakes
erosion narrows neck of meander eventually cutting it off
often when flooded river will cut through the neck
Flood plains
low-lying
lower course
area of flat land alongside a river
used for overspill of the river floods
Saltation
particles are smaller therefore bounced along river bed
Devon case study
met office moved to Devon
lower cost
close to london
increased population in Devon
pressure on housing
Traction
large particles like boulders pushed, rolled along river bed by force of water
Meanders
river erodes laterally
forms large bends
slower flow creates deposition on side
faster flow erodes other side creating bends
Discharge
volume if water which flows through river
Longshore drift
happens when waves break at an angle to the coast
transports sediments
Constructive waves
low energy waves
weak backwash
strong swash
results in buildup of material on shore
Destructive waves
high downward force
strong backwash
large wave height
short wave length
weak swash
Human activates that effect the coast
agriculture
housing
office development
industries
coastal management
Harry’s rock formation
large crack - hydronic action
cave becomes larger
cave breaks through forming arch
arch collapses
stack
stump
concordant
hard rock
soft rock
hard rock
discordant
———hard rock
soft rock
———hard rock
soft rock
types of coastal management
hard engineering
sea wall
rock armour
groynes
soft engineering
beach nourishment
planting vegetation
rock types
igneous
sedimentary
metamorphic
description of igneous rock
formed when molten rock from mantle cools down and hardens (granite)
description of sedimentary rock
formed when layers of sediment are compacted together until they become solid rock (limestone,clays)
description of metamorphic rock
formed when other rocks are changed by heat and pressure (slate)
how have humans changed the landscape
agriculture - cleared forest for farming
forestry - management of woodland areas
settlement - land used for housing
physical weathering
breakdown of rock from weather (wind, rain)
chemical weathering
breakdown of rock by changing its chemical composition
biological weathering
breakdown of rock by living things
different types of mass movements
landslides
slumps
rockfalls
types of erosion
hydraulic acid
abrasion
attrition