Allied & ICAR Exam Bank • ALLIED_0884 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Open Channel Flow

Subtopic: Open Channel Flow

Question Statement:

An M2 profile in gradually varied open channel flow occurs on a mild slope channel when depth $y$ satisfies:

Options:

  • (A) $y_n > y > y_c$ (drawdown curve approaching a free overfall or drop)
  • (B) $y > y_n > y_c$
  • (C) $y_c > y > y_n$
  • (D) $y < y_c < y_n$

Answer Key:

A

Step-by-Step Solution & Explanation

M2 drawdown curve occurs on a mild slope ($y_n > y_c$) where depth is depressed below normal depth but remains above critical depth ($y_n > y > y_c$).
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