Central Control HydroSystems-KDI recommends the use of an Irrigation Central Control System (CCS). It will provide the most efficient irrigation of the entire campus. The CCS will provide the most comprehensive way to schedule, adjust and monitor the entire system from a single location and/or online, through the Internet. To facilitate a prompt response, some CCS’s allow alarms to be sent to the operator via email and cell phone. The addition of the CCS will increase the system wide efficiency 10%-20% depending on the number of programming features implemented into the daily system wide irrigation operations.
The CCS will reduce irrigation run times therefore saving water and energy. Below are a few examples:
A- The CCS will allow for scheduling that maximizes the pump station and dedicated systems POC’s by maintaining the maximum discharge flows without exceeding the high flow limit and causing a premature shut down. This also helps complete the irrigation cycle within the nightly estimated water window. B- The CCS ET (Evapotransparation) function will auto adjust the operating times of each zone as re- quired by seasonal and daily use to reduce over and under watering calculated from actual or historical local area requirements. C- Additional available functions like cycle and soak (which helps eliminates run off by applying only the amount of water the soil can intake over several applications), Rain shut off override and skip days con- trolled by the operator at the CCS, will eliminate the time needed to adjust each area’s controller as is cur- rently required. Single site input allows for quick and efficient irrigation system management. D- Allows operator to shut down entire or part of the system for events. E- Monitor flows to better manage the water usage. This requires flow sensing at each POC.
These CCS functions are best utilized when they can be made quickly and universally, saving the time it takes to adjust all area controllers and the water that is wasted over that time.
A CCS should be chosen that has the ability to interface with the pump station controls for monitoring flow and the ability to remotely shut the pump off. Existing controllers should be reviewed for replacement with a CCS compatible satellite controller for integra- tion to central control. Utilizing newer two-wire controllers will minimize the number of required controllers and can be added onto more easily should phasing be required.
Scheduling If independent system controllers are used, the controllers should be capable of concurrent multi-program operation, multiple start times, flow sensing and global adjustment capabilities.
The operator should set up these programs to operate as close as possible to the POC’s design flow point to irrigate within the water window applied to each system.
Irrigation System Schematic Piping System The schematic pipe network shown on Exhibit ‘B’ illustrates proposed piping requirements for delivery of ir- rigation water for both pumping and tap supplied systems. The flow models supplied for this report are only one example of supply distribution for irrigating the site. They were selected to demonstrate how to maximize the existing supply and piping network flows to try and maintain peak irrigation flow demands. The enclosed information can be used to help adjust to the available resources and meet the required demands.
Domestic area potable water supply pressure is approximately 80 psi static.
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Chroma Design Inc.
University of Nebraska - Kearney Campus Landscape Master Plan
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