Question Bank • QB_EXP_SWCE_BND_001 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Terraces, Bunds & Vegetative Waterways

Subtopic: Horizontal spacing of contour bunds

Question Statement:

Contour bunds are to be constructed on agricultural land having a uniform land slope of $S = 3\%$. If the vertical interval is given by $VI = \left(\frac{S}{2} + 0.6\right)\text{ m}$, the horizontal spacing (interval) between two consecutive contour bunds is ________ $\text{m}$ (round off to one decimal place).

Answer Key:

70.0

Step-by-Step Solution & Explanation

Vertical Interval: $VI = \frac{3}{2} + 0.6 = 2.10\text{ m}$ Horizontal Interval $HI$ is: $HI = \frac{VI}{S / 100} = \frac{2.10}{0.030} = 70.0\text{ m}$
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