二.水循环( Hydrological cycle Water vapour into Water vapour in the atmosphere atmosphere Precipitation onto Precipitation on surface surface 110.000 k 0cean458,000km3 Glaciers Evaporation from land Evaporation from 65,200km3 0cean502,800km3 River sunol 42,600km Underground runoff 2200km Juvenile water Water expenses inflow for hydration Ocean area rea of closed regions runoff 30.000 km3 119,000my Area of exorheic runoff 361,000kmn3 水循环的主要方式:蒸发和输运二.水循环（Hydrological cycle） 水循环的主要方式：蒸发和输运