Question Bank • QB_EXP_SWCE_BND_005 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 $S = 2\%$. 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:

80.0

Step-by-Step Solution & Explanation

Vertical Interval: $VI = \frac{2}{2} + 0.6 = 1.60\text{ m}$ Horizontal Interval $HI$ is: $HI = \frac{VI}{S / 100} = \frac{1.60}{0.020} = 80.0\text{ m}$
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