GEOLOGY
GEOMORPHOLOGY
Question
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Discharge = (crosssectional) area x (average) velocity


Discharge = (crosssectional) area / (average) velocity


Discharge = time x (average) velocity


None of the above

Detailed explanation1: Flow rate and velocity are related byQ=A¯v Q = A v ¯ whereA is the crosssectional area of the flow and¯v is its average velocity. For incompressible fluids, flow rate at various points is constant.
Detailed explanation2: Discharge = V x D x W If length is measured in feet and time in seconds, Discharge has units of feet3/sec or cubic feet per second (cfs). Depth times Width gives the crosssectional area. The shape of the channel is important because of the reduction in velocity due to friction along the channel margins.
Detailed explanation3: Multiply the average depth of the stream by the width of the stream to find the area in ft2. Divide the distance traveled by the average travel time to find the velocity of the stream in ft/sec.
Detailed explanation4: Discharge (Q) for each cross section: Q = U A. Discharge is calculated by multiplying the mean flow velocity of each cross section by the total water area. 6.
Detailed explanation5: The relationship between the discharge in the stream at a given crosssection and the level of the stream is described by a rating curve. Average velocities and the crosssectional area of the stream are measured for a given stream level. The velocity and the area give the discharge for that level.