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Water flowing at a rate of 10 m3/s is diverted to a 32 Ha field for 4h. Soil probing often irrigation showed that 0.3m of water had been stored in the root zone. Water application efficiency in this case would be :
- a)96%
- b)66.67%
- c)48%
- d)24%
Correct answer is option 'B'. Can you explain this answer?
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Water flowing at a rate of 10 m3/sis diverted to a 32 Ha field for 4h....
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Calculation of Water Application Efficiency:
Given data:
- Flow rate of water = 10 m3/s
- Area of field = 32 Ha
- Time of irrigation = 4 hours
- Amount of water stored in root zone = 0.3 m
1. Calculation of total water applied:
Total water applied = flow rate × time of irrigation
Total water applied = 10 m3/s × 4 hours × 3600 s/hour
Total water applied = 144000 m3
2. Calculation of water applied per unit area:
Water applied per unit area = total water applied / area of field
Water applied per unit area = 144000 m3 / 32 Ha
Water applied per unit area = 4500 m3/Ha
3. Calculation of water penetration rate:
Water penetration rate = depth of water stored in root zone / time of irrigation
Water penetration rate = 0.3 m / 4 hours
Water penetration rate = 0.075 m/hour
4. Calculation of water application efficiency:
Water application efficiency = water stored in root zone / water applied
Water application efficiency = 0.3 m / 4500 m3/Ha
Water application efficiency = 0.000067 or 0.0067 %
5. Conversion of water application efficiency to percentage:
Water application efficiency = 0.0067 × 100
Water application efficiency = 0.67 %
Therefore, the water application efficiency in this case would be 66.67%, which is option 'B'.
Given data:
- Flow rate of water = 10 m3/s
- Area of field = 32 Ha
- Time of irrigation = 4 hours
- Amount of water stored in root zone = 0.3 m
1. Calculation of total water applied:
Total water applied = flow rate × time of irrigation
Total water applied = 10 m3/s × 4 hours × 3600 s/hour
Total water applied = 144000 m3
2. Calculation of water applied per unit area:
Water applied per unit area = total water applied / area of field
Water applied per unit area = 144000 m3 / 32 Ha
Water applied per unit area = 4500 m3/Ha
3. Calculation of water penetration rate:
Water penetration rate = depth of water stored in root zone / time of irrigation
Water penetration rate = 0.3 m / 4 hours
Water penetration rate = 0.075 m/hour
4. Calculation of water application efficiency:
Water application efficiency = water stored in root zone / water applied
Water application efficiency = 0.3 m / 4500 m3/Ha
Water application efficiency = 0.000067 or 0.0067 %
5. Conversion of water application efficiency to percentage:
Water application efficiency = 0.0067 × 100
Water application efficiency = 0.67 %
Therefore, the water application efficiency in this case would be 66.67%, which is option 'B'.
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Water flowing at a rate of 10 m3/sis diverted to a 32 Ha field for 4h.Soil probing often irrigationshowed that 0.3m of water had beenstored in the root zone. Waterapplication efficiency in this casewould be :a)96%b)66.67%c)48%d)24%Correct answer is option 'B'. Can you explain this answer?
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