Section 4: Soil and Water Conservation Engineering
Soil and Water Erosion
Subtopic: Biological and engineering measures to control erosion
Question Statement:
Remedial measure generally adopted for controlling stream-bank erosion is
Options:
(A) Shelter belts
(B) Spurs
(C) Brushwood dams
(D) Drop spillways
Official Answer Key:
B
Step-by-Step Solution & Explanation
• Stream-bank erosion is caused by the lateral force of flowing water directly attacking the bank. Spurs (groynes) are structures projected from the bank into the stream that deflect the high-velocity current away from the bank, inducing sediment deposition and protecting the bank line.
• Shelter belts control wind erosion of open fields, brushwood dams and drop spillways are gully-control structures used to stabilise the bed/head-cut of gullies rather than stream banks.
• Final Answer: (B) Spurs
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