# GENERAL GEOLOGY

## GEOLOGY

### GEOMORPHOLOGY

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the equation for calculating river discharge?
 A Discharge = (cross-sectional) area x (average) velocity B Discharge = (cross-sectional) area / (average) velocity C Discharge = time x (average) velocity D None of the above
Explanation:

Detailed explanation-1: -Flow rate and velocity are related byQ=A¯v Q = A v ¯ whereA is the cross-sectional area of the flow and¯v is its average velocity. For incompressible fluids, flow rate at various points is constant.

Detailed explanation-2: -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 cross-sectional area. The shape of the channel is important because of the reduction in velocity due to friction along the channel margins.

Detailed explanation-3: -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 explanation-4: -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 explanation-5: -The relationship between the discharge in the stream at a given cross-section and the level of the stream is described by a rating curve. Average velocities and the cross-sectional area of the stream are measured for a given stream level. The velocity and the area give the discharge for that level.

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