Flood stage.
Bank
capacity, obviously.
Flood stage penn
The course a stream follows is typically the path of least resistance. For example, water runs downhill. Streams follow paths where natural run-off occurs during a rain, or when snow melts at higher elevations. Water flows easier by going around large boulders than going through the boulder (unless the stone is porous, such as sandstone). Water will not "climb" banks to go in a new direction, except when the volume of water exceeds the width and depth of its natural path, for example, during a flood.
The stream banks will be steeper
The sides are known as the river bank or river banks.
After a stream's discharge increases, it overflows its banks and a flood occurs.
banks
a lake.
the natural resource found in the grand banks is oil and copper
She listened to the soothing sound of the stream as she sat by its banks.
A stream or brook can get bigger and become a river.
An effluent stream receives water from the banks surrounding it and so gets bigger as it goes along. An influent stream donates water to the banks around it and so gets smaller as it goes along (think desert conditions)