runoff
runoff
Run off
They are called naiads.
Rivers and streams that flow in to a larger river are called tributaries. They all form in the same spot.
alluvial
drought
It is usually the other way round. Moving in the direction of water flow, streams merge together to form larger rivers, the streams are called the river's tributaries. The point of joining is called a "confluence".
It can be caused by a single cloudburst of torrential rain, usually at higher ground. Collected rainwater runs downhill quickly overflowing rivers and streams.
Runoff water
Brooks........
Eutrophication?
runoff