Humans and flooding Flashcards
nile delta
depositional feature, sediment supplied by nile river
aswan high dam - prevents flow of sediment
water extraxtion slows flow
rising sea level combined with subsidence
increased coastal floods
salt water encroachment
Typhoon Haiyan
rapid urbanisation created vulnerability
few isalnds, no land to prevent it from energy gain
funnel shaped bay
taclobans pop. tripled in 40 years
formed when low presure created dome of water, winds move inland
eustatic change
increased volume of water
global
thermal expansion (every 1 degree sea levels rise 0.8m)
isostatic
change in land level
local
2004 earthquake raised land by 6m in SE asia
isostatic rebound
raised beach
northern scotland (emergent)
glacial rebound
relict beach above high tide level
covered by sand and pebbles
vegetated by plant succession
fossil cliffs
steep slope at back of raised beach
evidence of formation through marine erosion
wave cut notches, caves and arches
ria
submergent
soth devon, kingsbury estuary
drowned river velleys
glaciers melterd, flooded river mouth
fjord
west coast of scotland
u-shaped valleys flooded
created when galciers retreated and plucked
steep sides
shingle ridges
submergent
north sea
2m high in the UK
20m high when it reached germanny,denmark and netherlands
2 died
seven cliff tops in norfolk collapsed
flood defences breached
combination of high spring tide and severe european windstorm and low pressure
Bangladesh
deforestation of sundabarns, retreat 200m per year
himilayan snowmelt, monsoons and funnel shaped bay
some islands sunk by 1.5m in 40 years
46% of pop lives less than 10m below sea level
cyclone sider 2007
7th most vulnerable to cc
cyclone mocha, evacuated 700,000 people overnight
namibia
coastal buffer zone (no new developments)
accounts for sea level rise in SMP
early warning sysyems
chittagong
CCCRIP
raise embankments
climate resillient road infrastructure
south west bangladesh
