What happens as streamflow exits the mouth of a canyon and onto an alluvial fan?
A)the stream widens, but flows at the same velocity
B)stream competence stays constant
C)stream capacity increases
D)the stream erodes more than it deposits
E)the stream widens and stream velocity decreases

Question

What happens as streamflow exits the mouth of a canyon and onto an alluvial fan? ​
A)the stream widens, but flows at the same velocity
B)stream competence stays constant
C)stream capacity increases
D)the stream erodes more than it deposits
E)the stream widens and stream velocity decreases

Quizplus · Accepted Answer

As streamflow exits a canyon and spreads out onto an alluvial fan, it typically widens and its velocity decreases due to the reduction in gradient and confinement, leading to deposition rather than erosion.

What Happens as Streamflow Exits the Mouth of a Canyon