What is coefficient of uniformity in irrigation?
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).
How is irrigation uniformity calculated?
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.
Which irrigation method is most efficient for maintaining uniformity?
Drip irrigation is the most efficient and appropriate irrigation system. Instead of wetting the whole field surface, water is applied only to the plant root zone. The primary goal of drip irrigation is to apply water at the time when plants need it most and in rates needed for proper plant growth.
How can we improve the uniformity of irrigation?
You may need to add new nozzles, replace worn nozzles or change to closer spacing to get greater uniformity of overhead systems. More uniform watering results in more uniformity in plugs, seedlings and mature plants.
What is the correct formula for uniformity coefficient efficiency?
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.
What is irrigation efficiency?
Irrigation efficiency (IE) is the ratio of the amount of water consumed by the crop to the amount of water supplied through irrigation (surface, sprinkler or drip irrigation).
How do I calculate how much water I need for my irrigation system?
Step 2: Calculate the irrigation water need, both in mm/month and mm/day, using the formula: IN = ET crop – Pe; e.g. Feb: IN = 69 – 2 = 67 mm, etc.
What is the best irrigation method?
For watering large areas of farmland, drip irrigation is the most efficient irrigation system for reducing water and fertilizer loss. By filtering the water down through the soil and into the root system, some of the water percolates down into the groundwater system to be reused for irrigating in future years.
How can we increase water efficient irrigation system?
Irrigation efficiency can also be improved through altering farming practices, such as crop rotation (plant crops according to seasons and soil conditions) and conservation tillage (leaving a previous year’s crop residue on the field to reduce soil erosion and runoff) that help improve soil moisture conservation.
How do you calculate water efficiency?
The water use efficiency is the ration between dry matter production of a plant (the output) divided by evapotranspiration. Therefore the equation for Water use efficiency (WUE) will be written as: Dry matter production (kg/ha) / ET (in mm).