Gravity pulls the stream channel downward.
A river channel is formed by rock and soil of a stream being transported down, during this process the channels become wider and deeper.
channel
mature.
channel
It cuts a wider, shallow channel .
A mature river
the river becomes excited and becomes wider deeper and more wet
A mature river erodes its channel wider rather than deeper. The gradient of a mature river is less steep than young rivers, and the water flows more smoothly. Examples of mature rivers are the Thames, Mississippi, and Ohio rivers.
A youthful river is a river with a steep gradient that has very few tributaries and flows quickly. Its channels erode deeper rather than wider.
A stream that is longer and wider is usually considered a BROOK or a RIVER.
No some rivers can become wider, smaller, deeper and narrower. not all of them follow the same pattern.
a stream gets wider when it gets older and the water erodes the bed of the river to make it wider