Water irrigation systems and their components need to be designed in order to minimize maintenance and exposure of workers to traffic while conserving water at the same time. Ideal irrigation design is simple, straightforward and efficient. The concepts to be utilized must conform to the goals of local water conservation. Irrigation systems must be easy to operate and maintain with facilities near to the Readily-available Water (R/W), access gates, Maintenance Vehicle Pullouts or access roads.
Components
To appropriately water the area, make the irrigation components lesser in number. Irrigation components that are standard and commercially available must be used. No special features need to be specified unless there are unique problems of the site that needs to be solved.
Existing crossover conditions should be evaluated before incorporating the irrigation system into a highway planting project. It is ideal to install new crossovers if the existing ones are above 15 years old.
How to Install New Control Valves
Ensure that the control valves are located near to the access gates, maintenance access roads, maintenance vehicle pullouts or other areas away from traffic. The location of controllers and backflow preventers must be reviewed by the maintenance personnel in the field. Controller enclosure cabinets should be placed in a way that the user is facing the traffic when they work on controllers. Whenever possible, they must be located outside the clear recovery zone.
Reduced Pressure
For highway planting projects, the use of reduced pressure principle backflow devices is necessary. Use master remote control valves at all pressured water sources directly downstream of the backflow preventers. At the same time, backflow preventers must be located in enclosures.
For large irrigation systems, divide them into smaller sections so that in times when malfunctions occur, the bad section can be isolated and the remaining ones continue to be functional. To divide irrigation systems, gate valves are used. They are generally installed on each side of the irrigation crossovers.
Ball Valves
Ball valves are to be used in the front of Electric Remote Control Valves that are clustered. This shall allow maintenance workers to do servicing of the valves without draining the mainline and flooding the valve boxes. Never use ball valves at irrigation crossovers. If they are closed rapidly, they can cause water hammer.
To achieve the best irrigation designs, it is best to hire an expert or a professional. They abound in Adelaide Southern Australia. For more information, reach them through the websites. They will be more than willing to be of help.
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