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According to Kennedy's silt theory, silt deposition in irrigation canals mainly occurs due to?

28. According to Kennedy's silt theory, silt deposition in irrigation canals mainly occurs due to?

1. High water velocity
2. Turbulence caused by bends
3. Decrease in canal gradient
4. Sudden widening of the canal cross-section

Answer

The correct answer is: C) Decrease in canal gradient

Explanation

Kennedy's theory suggests that silt settles in irrigation canals primarily when there's a decrease in canal gradient, leading to reduced water velocity and subsequent deposition.