How do you calculate the distribution of uniformity of irrigation?
Distribution Uniformity
- Calculate the overall average (AvgT). Add all of the values and divide by the number of values.
- Rank the values in order and calculate the average of the lowest quartile (AvgLQ).
- DU is determined by dividing AvgLQ by AvgT and results in: 173.3/187.3= 0.93= DU.
What is distribution efficiency in irrigation?
The water distribution efficiency represents the extent to which the water has penetrated to a uniform depth, throughout the field. When the water has penetrated uniformly throughout the field, the deviation from the mean depth is zero and water distribution efficiency is 1.0.
What does du mean in irrigation?
Distribution Uniformity
Distribution Uniformity is the measure of how uniformly the water is. applied. * DU is a measure of the irrigation system.
Why is distribution uniformity important?
It is commonly referred to as distribution uniformity (DU) and expressed as a percentage. When an irrigation system applies water at a high uniformity, it is possible to achieve a high irrigation efficiency. Similarly, when irrigation is uniform, crop production and quality is often higher and boosts revenue potential.
What is the correct formula for uniformity coefficient?
Coefficient of Uniformity is a percent determined utilizing the formula CU = 100(1.0-Σd/mn), Road dust impacts almost all terrestrial areas of the planet and may impact vegetation and nearby ecosystems.
How is wafer uniformity calculated?
Wafer-to-Wafer Uniformity is calculated in Table 4 via the formula (Max- Min)/(Max+Min)x100 (%). Thickness data taken from the ellipsometer were collected in the interior space that would have been used to make devices.
What is the correct formula for water distribution efficiency?
Determine the distribution efficiency, if the depths of water in the field are 1.1 cm and 1.8 cm. Nd = (1 – d/D) x 100 = 75%. Explanation: Water distribution efficiency is also known as the uniformity coefficient. It is the measure of how uniformly water is applied to the area being irrigated.
How is irrigation efficiency calculated?
Irrigation efficiency is defined as the ratio between the amount of water used to meet the consumptive use requirement of crop plus that necessary to maintain a favourable salt balance in the crop root zone to the total volume of water diverted, stored or pumped for irrigation.
What is application efficiency?
Application Efficiency (AE) is a performance criterion that expresses how well an irrigation system performs when is operated to deliver a specific amount of water. AE is defined as the ratio of the average water depth applied and the target water depth during an irrigation event.
What is coefficient of uniformity in irrigation?
An alternative is Christiansen’s uniformity coefficient (CU), defined as the average depth of irrigation water applied minus the average absolute deviation from this depth, all divided by the average depth applied (ASAE, 1998).
What is coefficient of uniformity?
uniformity coefficient (u-ni-form’-i-ty). A numerical expression of the variety in particle sizes in mixed natural soils, defined as the ratio of the sieve size through which 60% (by weight) of the material passes to the sieve size that allows 10% of the material to pass.
How do you calculate CC and CU?
To find Cu and Cc. Cu – Uniformity coefficient. Cu = D60/D10. Cc – Coefficient of curvature.