Types of Irrigation Efficiencies

Q.

What does $\mathrm{S}$ mean in math?

Q. If the irrigation efficiency is 80%, conveyance losses are 20% and the actual depth of watering is 16 cm, the depth of water required at the canal outlet is

1. 10 cm
2. 15 cm
3. 20 cm
4. 25 cm

Q. In an irrigated field, the net irrigation requirement is 15 cm, the application efficiency is 80% and water conveyance efficiency is 60%. What is the gross irrigation requirement (in cm)?

1. 11.25
2. 18.75
3. 25
4. 31.25

Q. Calculate the water distribution efficiency if the depths of penetration along the length of a border strip at an interval of 20 m are 1.5 m, 1.8 m and 2.1 m respectively.

1. 0.6667
2. 0.8333
3. 0.8889
4. 0.9767

Q. The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as:

1. Water use efficiency.
2. Water conveyance efficiency.
3. Water application efficiency.
4. Water storage efficiency.

Q. A field was supplied with water from an irrigation tank at a rate of 120 lit/sec to irrigate an area of 2.5 hectares. The duration of irrigation is 8 hours. It was found that the actual delivery at the field, which is about 4 km from the tank, was 100 lit/sec. The runoff loss in the field was estimated as 800 $m^3$. The application efficiency in this situation is

1. 62%
2. 72%
3. 76%
4. 80%

Q. The depth of penetration along the length of a border strip at point 20 cm apart were probed. The observed values are 1.5, 1.8, 1.9, 1.6, and 2.1 meters. The water distribution efficiency is ______ %

1. 89.66

Q. A field measures 40 hectares. When 8 cumecs of water was supplied for 6 hours, 30 cm of water was stored in the root zone. The field application efficiency is nearly.

1. 70%
2. 80%
3. 85%
4. 90%

Q. In an irrigated area 12 m³/s of water is diverted to a $0.32k{m}^2$ field area for four hours. The soil moisture measurement in the field done after irrigation showed that 0.4 m of water has been stored in the root zone. The water application efficiency (correct to nearest decimal) in this case is:

1. 85%
2. 58.5%
3. 74%
4. 66.6%

Q. $15m^3/s$ of water is diverted to a $35$ hectares field for $5\text{hours}$. Soil proving after irrigation showed that $0.4m$ of water has been stored in the root zone. Water application efficiency in this case is ______ %

1. 51.85

Q. $15m^3/s$ of water is diverted to a $35$ hectares field for $5\text{hours}$. Soil proving after irrigation showed that $0.4m$ of water has been stored in the root zone. Water application efficiency in this case is ______ %

1. 51.85