Question

In a watershed of \(3000\) ha in flat topography, drainage coefficient was found to be \(5\) cm. If the drainage coefficient can be reduced to half by altering cropping pattern, what will be the discharge through drainage channel if both the condition are considered?

• A. \(0.057\) and \(1.52\ \text{m}^3/\text{sec}\)
• B. \(41.66\) and \(2.08\ \text{m}^3/\text{sec}\)
• C. \(0.173\) and \(0.83\ \text{m}^3/\text{sec}\)
• D. \(17.36\) and \(8.68\ \text{m}^3/\text{sec}\)

Hint:

Drainage discharge formula: \[ \boxed{ Q = \frac{A \times d}{864} } \] where:
• \(A\) in hectares
• \(d\) in cm/day Remember: \[ \boxed{ \text{Reducing drainage coefficient reduces discharge proportionally} } \]

Answer 1

The Correct Option is D