Please solve attached problem. In the study of rivers, a very common indicator t

Question

Please solve attached problem.

In the study of rivers, a very common indicator that physical geographers measure is discharge (Q). Discharge is the amount of water that moves past a given cross-section of a river per second. The measurement in Saudi Arabia is cubic meters per second. Width x depth x velocity allows you to calculate discharge. Please fill in the blank with the best answer. At the height of this flash flood, velocity of the flood would have been 100 m, a depth of 4.5 m and a discharge of 1800 m3/sec with a width of 8 m/sec O 12 m/sec 4 m/sec 12 ft/sec

Explanation / Answer

The answer is c=4 m/sec

So according to given statement,
Discharge = velocity * cross sectional area

Given,
discharge= 1800 m3/ sec,
width= 100m and depth= 4.5m, So Area=100 * 4.5 = 450 m2.

So velocity = Discharge / Area
v= 1800 / 450

velocity= 4 m /sec

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