12a) Y our task is to calculate the discharge of an urban stream during a major

Question

12a) Y our task is to calculate the discharge of an urban stream during a major storm event che stream discharge is too high for you to safely measure discharge and thus you need to estimate the velocity. The stream channel is rectangular (3.75 m wide and 0.75 m deep) and is lined with surveyed height marker that the water is currently informe will smoothed concrete. You are standing on a bridge and can see from a 0.35 m deep. Your reconnaissance work has d you that the bridge is at an elevation of 317 fect and that 500 feet upstream from the bridge is a surveyed benchmark at 329 feet. Please report your final answers in metric units. (8 pts) 12b) Calculate what the discharge would be if the channel was a straight, unlined, earth (dirt) canal. Please report your final answer in metric units. (2 pts)

Explanation / Answer

Answer:12a

Discharge can be calculate by following formula;

D= Velocity of water* depth of water * width of water.

Where, depth is given = 0.35m and width =3.75m

Put the veocity according major storm event

Answer:12b

If channel was with earth (dirt), single line then discharge become more through canal.

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