What is an irrigation audit?
An irrigation audit is a procedure used to collect and provide information about the uniformity of application, rate of precipitation, and overall condition of an irrigation system (Irrigation Association).
Why do an irrigation audit?
Irrigation auditors collect data, verify systems are working as designed and identify opportunities to improve water-use efficiency.
How do I calculate how much irrigation I need?
If you find you need 0.20 inches of irrigation, then 0.20 inches of rainfall would provide the required water. But most people in the USA want a value in gallons, which requires you to provide a little more information about your yard.
How do you audit an irrigation system?
Use the findings to create or tweak irrigation schedules for efficiency. -Before testing the system, check that it is in proper working order and complies with local codes. Identify and correct any defects. -While doing the audit, monitor the wind speed, and record it every five minutes.
What is DU in irrigation?
Distribution Uniformity (DU) is a measure of how uniformly water is being applied across the orchard, or whether certain parts of the orchard are receiving more water than others. It is a measure of the irrigation system.
What is irrigation frequency?
Irrigation frequency refers to the number of days between irrigation during periods without rainfall. It depends on consumptive use of rate of a crop and on the amount of available moisture in the crop root zone. It is function of crop, soil and climate.
What is irrigation requirement?
Irrigation requirement is the total quantity of water applied to the land surface in supplement to the water supplied through rainfall and soil profile to meet the water needs of crops for optimum growth. IR = WR – (ER + S)
What are the three systems of irrigation?
There are three commonly used methods: surface irrigation, sprinkler irrigation and drip irrigation.
What is irrigation system?
Irrigation is the artificial application of water to the soil through various systems of tubes, pumps, and sprays. Irrigation is usually used in areas where rainfall is irregular or dry times or drought is expected. There are many types of irrigation systems, in which water is supplied to the entire field uniformly.
What is uniformity formula?
Divide the average of the lowest quartile (AvgLQ) by the total average (AvgT) to get distribution uniformity (DU).
What is uniformity coefficient in irrigation?
This uniformity coefficient (UC) is a percentage on a scale of 0 to 100 (absolute uniformity). A uniformity coefficient of 80 is considered by many to be the minimum acceptable performance. Higher uniformity coefficients are usually needed with intensively maintained ornamentals.
What is depth of irrigation?
The irrigation depth is the amount of water that needs to be applied to an irrigated system when soil water is reduced to the specified depletion level. A definition for each data item that needs to be entered is provided below.
What is irrigation efficiency?
Definition of irrigation efficiency : the ratio between irrigation water actually utilized by growing crops and water diverted from a source (as a stream) in order to supply such irrigation water.
What is mm in water requirement?
Crop water requirements (CWR) are defined as the depth of water [mm] needed to meet the water consumed through evapotranspiration (ETc) by a disease-free crop, growing in large fields under non-restricting soil conditions including soil water and fertility, and achieving full production potential under the given …
What is ETc in irrigation?
ETc = potential crop evapotranspiration (mm)