Enrol to start learning
Reading is open to everyone. Enrolling is free, and it is what unlocks the audio lessons, practice tests and progress tracking.
20. Measurement of Evapotranspiration
Evapotranspiration encompasses the combined processes of evaporation and transpiration, playing a vital role in the hydrologic cycle and water resource management. Accurate measurement methods, both direct and indirect, include lysimeters, water balance, and remote sensing techniques, which provide insights into water balance, irrigation planning, and drought assessment. Various factors such as climate and plant characteristics influence evapotranspiration rates, which can be quantified using mathematical models and empirical methods.
Sections
Evapotranspiration is the process combining evaporation and transpiration, crucial for water resource management.
Evapotranspiration is a key component of the hydrologic cycle.
Measurement of evapotranspiration is essential for effective water resource management.
Both direct and indirect methods can be employed to estimate evapotranspiration accurately.
Evapotranspiration
The total water loss from both evaporation and transpiration processes.
Potential Evapotranspiration (PET)
The amount of evapotranspiration that occurs with an unlimited water supply.
Lysimeter
A device used to measure the amount of water lost through evapotranspiration.
Water Balance Method
A method of estimating evapotranspiration based on the continuity equation using precipitation, runoff, deep percolation, and soil water storage changes.
Crop Coefficient (Kc)
A factor that accounts for the specific crop's water use compared to reference evapotranspiration.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
1 more question available
Enrol free