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Civil Engineering PE

Category - Hydrology

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Time of concentrate (T_c) is the time required for water falling on the hydraulically most remote point in a drainage area to flow to a specific point. Which of the following factors affect T_c?

Surface roughness, channel shape and flow patterns, slope
Surface roughness, distance, channel shape and flow patterns
Distance, channel shape and flow patterns, slope
None of the above

Explanation

Answer: A - Surface roughness, channel shape and flow patterns, and slope affect the time of concentration. Hydraulically, the most remote point in a drainage area may not be the point which is the furthest away. For example, water that travels a short distance across rough, flat terrain may take a longer time to reach a given point than water traveling a longer distance across steep, smooth terrain.

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