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The sprinkler system basically simulates rainfall in that water is applied through overhead spraying. Therefore, these systems are also known as overhead irrigation systems. As such, the water distribution of certain sprinkler systems is affected to a large extent by the wind patterns and velocity in a particular area. Sprinkler irrigation systems are suitable for most crops, except those whose leaves may be sensitive to prolonged contact with water or crops requiring ponding of water at some stage of their life. They are generally suitable for light, frequent irrigations, unlike most surface irrigation systems.
Laboratory experiments were carried out at the National Irrigation Laboratory of Agricultural Engineering Research Institute (AEnRI), Dokki, Giza, Egypt.
The objectives of this study are to:
Evaluate two impact sprinkler: 1/2’’ – 3/4’’ inlet diameter.
Change riser diameter of impact sprinkler to improving impact performance.
Use different riser height of impact sprinkler.
Increasing flow rate and precipitation rate of impact sprinkler.
Achieve more distribution uniformity of impact sprinkler.
Impact sprinklers were evaluated at four operating pressures 175, 200, 225 and 250 kPa.
Moreover, the studied factors included two impact sprinklers of (1/2’’ and 3/4’’) inlet diameter, two riser heights (0.75 m and 1.0 m) with a unique diameter for the riser and two different diameters for the riser.