Stream discharge physically depends on two factors: stream cross-sectional area and velocity. Area is composed of width and depth. Q (flow) = vel x width x depth.
Stream elevation change, or how steep a stream is, will affect the velocity. Higher sloping streams (like those with few meanders) will travel faster than sinuous, snaking streams that have a lower elevation drop per length of stream.
When a stream's discharge increases, erosive energy increases.
If in a given stream the velocity doubles, the discharge: Choose one answer
When the discharge of a stream increases, so does it's velocity. When it decreases, so does the velocity.
After a stream's discharge increases, it overflows its banks and a flood occurs.
rate of stream discharge is directly proportional to the erosion i.e the higher the velocity of the stream then it will erode the rock rapidly while the deposition process will be slow when the velocity will be high.
the competence and capacity of a steam depend on a streams velocity and discharge. Because the velocity and discharge of a given stream are not constant , the competence and capacity of a stream are not constant . competence and capacity vary along a stream and change throughout the year.
Stream discharge is a product of the velocity and the area of the stream (velocity x width x depth), and has units of volume per time (e.g. cubic feet per second, cubic meter per day, etc). Stream velocity is the vector describing the speed of the water and has units of length per time (feet per second, meter per second). Stream discharge is relatively constant as you move up and down a stream, while velocity will change predominately as you change depth. The velocity of water is lowest near the bed of the stream, and highest at the surface.
The velocity and discharge volume of the stream or river.
Stream velocity is dependent of four things. They are, the flow type, the gradient, the channel shape, and the discharge of the stream. Streams will flow faster in narrow channels on steeper grades.
A) the distance traveled by water in a channel times a drop in elevation b) the drop in elevation of a stream divided by the distance the water travels c) the water pressure at the bottom of the stream divided by the stream's width d) the increase in discharge of a stream per unit drop in elevation
Q (Discharge in m3/s) = A (cross-sectional area in m2) x u (velocity - a corrected value in m/s)
http://www.michigandnr.com/PUBLICATIONS/PDFS/ifr/manual/SMII%20Chapter19.pdf