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Resources
Irrigation Calculators
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Landscape Calculator helps develop watering times for landscape irrigation. |
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Agricultural Calculator helps develop watering times for agriculture irrigation. |
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Weather Calculator |
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Soil Calculator determines soil parameters useful for irrigation design. |
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ONLINE STORE
Purchase Manuals and Guides for your
irrigation needs in our
online store.
Irrigation Scheduling
Irrigation systems should be designed and operated to supply plant water requirements while minimizing runoff and leaching. To ensure peak irrigation system performance the system design should take into account evapotranspiration (ET), soil type and irrigation system efficiencies.
High frequency irrigation leads to increased surface evaporation and usually a higher rate of transpiration by the plants. Proper scheduling minimizes the frequency of irrigation but maximizes duration of application that is allowed by the soil and plants. It is better to have an irrigation schedule where irrigation occurs less frequently but fully utilizes water stored in the plants' root zone. 
Turf and Landscape Irrigation Scheduling
For more information on irrigation scheduling for turf and landscape irrigation a booklet is available for purchase: Turf and Landscape Irrigation Scheduling (November 2004)
Calculator Users Guides
Help is available to assist you in using the Calculators by clicking this link to Irrigation Calculators and downloading the appropriate Users Guide.
Weather Calculator
The 
Blue weather calculator icon is linked to www.farmwest.com and provides real time evapotranspiration (ET) information for various locations in British Columbia. Evapotranspiration (ET) is a measurement of the rate that a plant needs water. It is either measured directly using an evaporation pan or stmometer or calculated using climatic data obtained from a weather station. ET data can be used to help an irrigator schedule an irrigation system to ensure that the right amount of water is applied to the crop at the right time. This information is also used in the irrigation calculators to determine an irrigation schedule.
This calculator makes use of Macromedia Flash software. When you launch the calculator it will check to see if you have the appropriate software installed. If it is not installed, you will be promted to download the software.
Additional factsheets are provided on www.farmwest.com to help develop an irrigation schedule using ET data.