Allied & ICAR Exam Bank • ALLIED_0442 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrograph Analysis and Watershed Routing

Question Statement:

In watershed morphometry, the Bifurcation Ratio $R_b$ is defined as:

Options:

  • (A) The ratio of the number of streams of a given order $u$ to the number of streams of the next higher order $u+1$ ($R_b = N_u / N_{u+1}$)
  • (B) The ratio of basin area to perimeter
  • (C) The ratio of main stream length to basin width
  • (D) The ratio of stream length to fall

Answer Key:

A

Step-by-Step Solution & Explanation

According to Horton's law of stream numbers, $R_b = N_u / N_{u+1}$, which typically ranges from 3 to 5 in natural drainage basins.
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