水循环( Hydrological cycle our in he atmosphere atmosphere Precip Precipitation on surface surface 110, 000 km ocean 458,000 km3 Evaporation from land Evaporation from 65,200km3 ocean 502. 800 km Underground runoff Juvenile water Water expenses for hydration Ocean area rea of closed regions Area of exorheic runoff runoff 30 000 km3 361,000km3 水循环的主要方式:蒸发和输运水循环（Hydrological cycle） 水循环的主要方式：蒸发和输运