Correct Answer - Option 4 : 1056 Hec/Cumec
Concept:
Duty: It is the number of hectares of land irrigated for full growth of a given crop by a supply of 1 cumec of water continuously during the entire base period of that crop.
Delta: The total water depth required by a crop to attain its full maturity in its base period.
Base Period: The time period that elapsed for the instant of the showing of crop to the instant of its harvesting is called base period or crop period.
The relation between Duty (D), Delta (Δ) and Base period (B) is given as:
\({\bf{Δ }}\left( {{\bf{metres}}} \right) = \frac{{8.64B}}{D}\)
Calculation:
B = 110 Days, Δ = 0.9 m
\(D = \frac{{8.64B}}{Δ} = \frac{{8.64\times 110}}{0.9}=1056\; hec/Cumec\)
