Allied & ICAR Exam Bank • ALLIED_0473 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Gully Control and Drop Spillways

Subtopic: Gully Control and Drop Spillways

Question Statement:

According to Bligh's creep theory for safety against piping under a hydraulic structure, total creep length $L \ge C_B H_{seep}$. For sand having Bligh's coefficient $C_B = 12$ and total seepage head $H_{seep} = 1.5\text{ m}$, the minimum required creep length $L$ in meters is:

Answer Key:

18

Step-by-Step Solution & Explanation

$L = 12 \times 1.5 = 18.0\text{ m}$.
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