The figure below shows two hypothetical streams that have identical cross-sectional areas but different channel shapes.Assuming all other factors are equal,stream ________ will have the fastest flow because of the difference in ________.
A)A;width
B)A;wetted perimeter
C)B;width
D)B;wetted perimeter

Question

The figure below shows two hypothetical streams that have identical cross-sectional areas but different channel shapes.Assuming all other factors are equal,stream ________ will have the fastest flow because of the difference in ________. 
A)A;width 
B)A;wetted perimeter 
C)B;width 
D)B;wetted perimeter

Quizplus · Accepted Answer

The wetted perimeter is the length of the stream bed that is in contact with the flowing water. In channel B, the water has a greater wetted perimeter, which means it has more contact with the stream bed and thus more frictional resistance. This friction slows down the velocity of the water, resulting in slower flow. Therefore, stream A, with its smaller wetted perimeter, will have the fastest flow.

The Figure Below Shows Two Hypothetical Streams That Have Identical