Source- the place in which a river begins
Mouth-where a river ends its journey, flowing into a lake or sea
tributary- a smaller river joining a larger one
confluence-the point at which 2 rivers join
water shed-the boundry between 2 drainage basins.
drainage basin-the area which is drained by a river and its tributaryes
drainage density-the total length of the streams in the basin divided by the total area of the basin.
drainage basin system
transpiration-water vapour is released through the stomata in the leaves
interception-water is stored on leaves or branches
throughflow-water flows horizontilly through rocks into the river
percolation-water flows vertically through soil and rocks
infiltration-water seeps into the ground
groundwater flow-water horizontilly through rocks to the river
evaporation- from droplets to vapour
surface runoff-water flows horizontally over land into the river