I believe that it is called a runoff.
river
runoff
The Seine flows through Paris and eventually empties into the English Channel. The channel separates Britain from France.
The Parry Channel is a natural waterway through the central Canadian Arctic Archipelago.
A channel is any natural or artificially constructed water course or pathway through which something can flow.
The urethra.
The channel through which a natural stream of water runs or used to run
The Ganges River flows through northern India and empties into the Bay of Bengal.
The Seine is the second longest river in France. It rises 18 miles northwest of Dijon and flows in a northwesterly direction through Paris before it empties into the English Channel at Le Havre.
Water runs through a channel, either natural or built.The water spins an electricity turbine in the channel, producing electricity.
It empties through the Great Bear River into the Mackenzie River and that river empties into the Arctic Ocean.
thames
Louisiana.
the nighle river