Allied & ICAR Exam Bank • ALLIED_1170 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Watershed Morphometry

Subtopic: Bifurcation Ratio

Question Statement:

In a watershed stream ordering analysis according to Strahler's system, there are 48 first-order streams ($N_1 = 48$) and 12 second-order streams ($N_2 = 12$). The bifurcation ratio $R_b = N_1 / N_2$ between first and second order streams is:

Answer Key:

4.0

Step-by-Step Solution & Explanation

$R_b = \frac{N_1}{N_2} = \frac{48}{12} = 4.0$. (Bifurcation ratios in natural watersheds typically range between 3.0 and 5.0).
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