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Water compostition of earth
97.5% = saltwater
2.5% = fresh water
of the fresh water 67% inaccesseble
Percy and simon stole some sweet rolos to annoy vanessas ugly dad andy
precipitation, anticedant, soil type, snow, shape of basin, rock, temp, agriculture, vegetation, urbanisation, deforestation, afforestation
4 Flooding improvements
resevoirs
management
forest cover in ireland went from 1%→11%
£500,000 scheme helped yorkshire town miss winter floods
Water cycle changes 4
Public demand for freshwater aquifers in S england =over abstraction= seasonal springs drying up=no recreation, worse in industrial rev when groundwater was 88m below sea level, now its recovering
cloud seeding in idaho to increase precipitation
Tourist resorts have huge demand that groundwater was infiltrated with salt so malta is now using desalinisation plants
soil drainage systems can support farming and increase productivity but it increases flooding and wind erosion
Mitigation
$800 million dam in Saskatchuwan captureds 90% of carbon emmissions by pumping its co2 emissions into rock and extracting oil
COP 21 limit 2 degree rise
Adaptation
spain lost 20% of its freshwater in 20 years so made policy changes