Any rain that falls on the land will flow downhill towards the sea due to gravity. Mountain streams will join other streams in the valleys, and then become large enough to be called a river.
A river system is made up of a river and its tributaries. It also has the river's mouths and deltas.
the River Thames, is natural, it is not man-made.
the nile river was made by a ditch
the river thames, is natural, it is not man-made.
The Colorado river is not man made, but a reservoir on the river named Lake Powell is.
The Ross River Bridge Is Made Out Of Sandstone
A River Made to Drown In was created in 1997.
Like all rivers, the Brisbane River is made of water.
The duration of A River Made to Drown In is 1.63 hours.
sediments
tributaries
River Brahmaputra has made Assam very fertile.