Command Area and Intensity of Irrigation

Q. The intensity of Irrigation means

1. Percentage of cultivable commanded area to be irrigated annually
2. Percentage of gross commanded area to be irrigated annually
3. Percentage of the mean of culturable commanded area and the gross commanded area to be irrigated annually
4. The total depth of water supplied by the number of waterings

Q. A tube well having a capacity of $4m^3$/hour operates for 20 hours each day during the irrigation season. How much area can be commanded if the irrigation interval is 20 days and depth of irrigation is 7 cm?

1. $1.71\times {10}^4{m}^2$
2. $1.14\times {10}^4{m}^2$
3. $22.9\times {10}^4{m}^2$
4. $2.29\times {10}^4{m}^2$

Q. The discharge available from a tube well is $140m^3/hr$. Assuming $10$ hours of pumping per day for $350$ days in a year. then the culturable area that this tube well can command is____hectares.
[Take the intensity of irrigation as 45% and average water depth required for the Rabi and Kharif crops as 500 mm]

1. 217.77

Q. A lift irrigation scheme using a discharge of 96 $m^3/hr$ is planned to raise a crop with an average delta of 0.375 m. Intensity of irrigation is 60%. Assuming 3600 hours of working of the tubewell for a year, the culturable command area is

1. 96 Ha
2. 48 Ha
3. 153 Ha
4. 120 Ha

Q. In an irrigation project, in a certain year, 70% and 46% of the culturable command area in Kharif and Rabi, respectively, remained without water and rest of the area got irrigation water. The intensity of irrigation in that year for the project was :

1. 116%
2. 84%
3. 42%
4. 58%

Q. If the intensity of irrigation for Rabi is 60% and that Kharif is 70%, then the yearly intensity of irrigation will be

1. 60%
2. 70%
3. 100%
4. 130%