Question

The intensity of Irrigation means

• A. Percentage of cultivable commanded area to be irrigated annually
• B. Percentage of gross commanded area to be irrigated annually
• C. Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
• D. The total depth of water supplied by the number of waterings

Answer 1

The correct option is A Percentage of cultivable commanded area to be irrigated annually

The intensity of Irrigation: It is defined as the percentage of the culturable commanded area proposed to be irrigated annually.

• The yearly intensity of irrigation may be obtained by adding the intensity of irrigation for all the crop seasons.
• E.g., If the intensity of irrigation for Rabi is 50% and that for Kharif is 60% then the yearly intensity of irrigation will be 110% (50% + 60%).

Note:
1. Commanded area: It is defined as the area which can be irrigated (or commanded) by a canal system.
2. Gross commanded area: The gross commanded area is defined as the total area which can be irrigated by a canal system such that an unlimited quantity of water is available.
It includes culturable & unculturable areas.
3. Culturable commanded area (CCA): The culturable commanded area is that portion of the gross commanded area which is culturable or cultivable.
Culturable commanded area may be obtained by subtracting the unculturable area from the gross commanded area.
Thus, C.C.A. = G.C.A - unculturable area
Note: Base period: It is defined as the total time between the first watering done for the preparation of the land for sowing of a crop and the last watering done before its harvesting.
Crop period: It is defined as the total time that elapses between the sowing of the crop and its harvesting. Thus, the crop period represents the total time during which the crop remains in the field.
The crop period is slightly more than the base period for any crop but for calculation purposes, they are taken same.