This Farmnote was produced as a joint project of the WA Branch of the Irrigation Association of Australia and the Irrigation Section of Agriculture Western Australia.
Further information is available from either group .
When the variation in elevation across a property is more than 2 m, irrigation designs should incorporate topographical information. Sprinklers should be spaced for maximum uniformity of water distribution. Pressure variations along a lateral should not exceed 10 per cent of the operating pressure. The mainline should be selected one class higher than that specified for the operating pressure. This will cater for the extra pressure caused by water hammer.