Flashcards in EQ1 the global hydrological cycle statistics Deck (10)
what percentage of water on earth occurs as fresh water?
what percentage of this fresh water is accessible and where is the majority of the worlds fresh water located??
2/3 rds of world's freshwater is locked up in the cryosphere
TROPICAL RAINFORESTS HYDROLOGY
what % of precip. is consumed by dense vegetation and how much is l returned by evapotrans. ?
75% of precipitation
50-75% is returned by evapotrans.
TROPICAL RAINFOREST HYDROLOGY
annual precipitation is how much?
what is the annual precipitation?
less than 200 mm
where is most of the world's water located and how much?
96.5% in the oceans
what % of water is in the ice caps?
what water store has the longest residence time?
groundwater - 10,000 years
ice cap- 15,000 years depending on size
DEFORESTATION IN AMAZON FOREST
Effects of deforestation in Amazon basin?
- Reduction of nearly around 324km^3 of river runoff by deforestation & human regulation of river flow
- reduction of vegetation = increased surface run off and less infiltration = higher river levels after rainfall
- drop in green water stores and increase in blue water stores
- conventional and frontal rainfall/ precipitation recycling is not able to occur due to decrease in evapotranspiration