Question

Which of the following is a method for estimating evaporation from a water surface?

• A. Darcy's law
• B. Penman method
• C. Rational method
• D. Gumbel's method

Hint:

Penman method requires inputs like net radiation, air temperature, humidity, and wind speed, making it reliable for evaporation estimation.

Answer 1

The Correct Option is B

The Penman method is a widely used and accurate technique for estimating evaporation and evapotranspiration. It combines energy balance and mass transfer approaches.
Explanation of Options:
- Darcy's law: Related to groundwater flow, not evaporation.
- Rational method: Used for estimating peak runoff from rainfall, not evaporation.
- Gumbel's method: Statistical method for flood frequency analysis.
Hence, only the Penman method is suitable for estimating evaporation.