Question:
Which of the following methods is not used for measurement of evapotranspiration?
Which of the following methods is not used for measurement of evapotranspiration?
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ET measurement methods:
- Direct: Lysimeter, field plots, soil moisture depletion.
- Indirect: Pan evaporation, Penman-Monteith, FAO methods.
ET = Kc × ETo (crop coefficient method).
- Direct: Lysimeter, field plots, soil moisture depletion.
- Indirect: Pan evaporation, Penman-Monteith, FAO methods.
ET = Kc × ETo (crop coefficient method).
Updated On: Aug 25, 2026
- Lysimeter
- Field experimental plot
- Soil moisture depletion
- Evaporimeter
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Evapotranspiration (ET) is the sum of evaporation and transpiration.
Step 2: Detailed Explanation:
Methods for measuring evapotranspiration:
- Lysimeter (A): Direct measurement of ET (weighing or drainage).
- Field experimental plot (B): Water balance method.
- Soil moisture depletion (C): Measuring soil moisture before and after.
Evaporimeter (D):
Measures evaporation from a free water surface (pan evaporation).
It does not measure evapotranspiration directly.
It estimates potential ET using pan coefficients.
Thus, the evaporimeter is not a direct method for measuring ET.
Step 3: Final Answer:
Thus, the evaporimeter is not used for measurement of evapotranspiration.
[0.5cm]
Evapotranspiration (ET) is the sum of evaporation and transpiration.
Step 2: Detailed Explanation:
Methods for measuring evapotranspiration:
- Lysimeter (A): Direct measurement of ET (weighing or drainage).
- Field experimental plot (B): Water balance method.
- Soil moisture depletion (C): Measuring soil moisture before and after.
Evaporimeter (D):
Measures evaporation from a free water surface (pan evaporation).
It does not measure evapotranspiration directly.
It estimates potential ET using pan coefficients.
Thus, the evaporimeter is not a direct method for measuring ET.
Step 3: Final Answer:
Thus, the evaporimeter is not used for measurement of evapotranspiration.
[0.5cm]
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