Flooding
- Created by: vezting
- Created on: 28-12-15 11:10
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- flooding
- Yangtze
- facts
- longest river in Asia- 6300km long
- drainage basin over 1.8mliion km2
- extremely important element of chinas economic and social geography
- 1998 flooding
- 3700 deaths
- 15 million lost homes
- economic loss of over $26 billion
- inundated 25 million hectares of cropland
- causes
- rainfall along the river between Nov 1997 and April 1998 was highest ever recorded
- most serious snow melt disaster over the winter period
- deforestation
- incomplete levees
- monsoon rains
- facts
- Severn
- facts
- runs along English/Welsh border
- upper course is above 300m in steep slopes with low permeability
- lower course most of the catchement is only a few metres above sea level
- many tributaries
- anual rainfall in welsh mountains exceeds 2000mm and is intense and prolonged
- there are many buildings on the severn flood plain, without adequate defenses
- 2007 flood
- heavy rainfall 20th July, 135mm of rain felel in Penshore in just 16 hours
- wettest summer since 1766
- soils saturated from rain in June
- avons flood plain flooded first
- slow moving warm depressions, carrying more moisture than normal
- effects
- people left without power supply and water treatment. loss of power for 50,000 for two days, no water for 140,000 for 5 days, 10,000 motorists stranded on m5
- m5 shut, crops destroyed, 27,000 domestic insurance claims
- thousands of small mammals drowned, fish left stranded after water retreated
- responses
- severn trent water authortiy had 5 million litres of bottled water distrubuted every day
- £87 million for emergency aid fundings for schools transports and businesses
- increase of spending to £800 million on flood defences
- facts
- Yangtze
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