The equation for determining the uniformity coefficient of sprinkler irrigation system was given by whom?

✅Explanation:
The uniformity coefficient is a measure of how evenly water is distributed by a sprinkler irrigation system. It is an important factor in determining the efficiency and effectiveness of irrigation. Christiansen's formula is a widely used method for calculating the uniformity coefficient. It is based on the average deviation of water application depths from the mean depth.

• Christiansen's Uniformity Coefficient (CUC) formula:
CUC = 1 – (Σ|x – m| / nx̄) x 100%

• Where:
● x = individual catch can depth
● m = average catch can depth
● n = number of catch cans
A higher CUC indicates a more uniform water distribution, which is desirable for optimal crop growth and water use efficiency.

🔴 Related terminologies:
● Distribution Uniformity (DU): A similar concept to the uniformity coefficient, but it is calculated using a different formula.
● Scheduling coefficient: A factor that accounts for the variability in water application and helps determine the optimal irrigation schedule.
● Catch can test: A method for measuring the actual water distribution from a sprinkler system, which is used to calculate the uniformity coefficient.
● Sprinkler head: The part of the irrigation system that distributes water in a spray pattern.
● Irrigation efficiency: The ratio of the water beneficially used by the crop to the total amount of water applied.