Presence of Vegetation | Permeability of Rocks | Size of Drainage Basin | Climate |     

The amount of precipitation and temperature affects the volume of river. During dry season, a river channel may be almost empty therefore the volume is low. During the wet season, the volume will be high and water may overflow the channel and flood the surrounding land.

Temperature also plays a part in influencing the volume of rivers. When the temperature is high, there is more evaporation and transpiration which reduces the amount of water in the river.