Water Cycle on a Global Scale Flashcards
atmosphere, hydrosphere, cryosphere and lithosphere
gas, liquid, solid, stored in the crust and mantle
fun facts
ocean stores 97% of all global water
freshwater is roughly 2.5% with glaciers being 69% of that 2.5% and groundwater being 30% and the extra 1% is surface water like lakes, rivers, permafrost, swamps and Marshalls
farming
irrigation removes water from local rivers - reduced flow, pastoral farming compacts soil, reduced infiltration and increased surface run-off. arable farming means crops increase interception and evapotranspiration, the plough breaks up the surface which increases infiltration.
land use changes
deforestation for pastoral farming means reduced interception and evapotranspiration.
both types of farming can pollute the nearby water