によって hui sien 13年前.
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Places with low rainfall have a lower volume of water in the river
PLaces with high rainfall have a higher volume of water in the river
The climate affect the volume of water in its channel
Low permeabilty decrease infiltation and increase runoff .Thus , the volume of water in the river is high
High permeabilty increase infiltration and decrease runoff , Thus, volume of water in the river is low .
Sparse vegetation leads to high surface runoff , thus increasing the amount of water in a river .
Abundant vegetation decrease , the amount of surface runoff , thus reducing the amountof water in the river
How the presence of vegetation affect the volume of a river
A large drainage basin result in large volume of water in the river .
A small drainage area result in a small volume of water in the river .
How a size of drainage affect the voulme of river
Large drainage = large sureface area = large amount of water
A small wetted perimeter causes the speed of the river to be high because there is less friction
A large wetted perimeter causes the speed of the river to be low because there is a lot of friction
The shape of a river channel affects the wetted perimeter , which is the length and breadth of the channel in contact with the river's water
A steep gradient causes the speed of river to be high
A gentle gradient causes the speed of the river to be low
The speed of the river depends on the gradient / steepness of the channel
A smooth channel increases the speed of the river because of lower friction
A rough channel reduces the speed of the river because of high friction
how the presence of obstacles would cause friction between the water and channel and affects the speed
