BRAE 236 Irrigation Eff and DU Lecture

BRAE 236 Irrigation Eff and DU Lecture - Distribution...

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1 Distribution Uniformity and Irrigation Efficiency ITRC BRAE/Cal Poly Basic Irrigation Performance Term Distribution Uniformity Measure of how uniformly the water is •Measure of how uniformly the water is distributed throughout a field •Always less than 1.00 •Always a decimal value ITRC BRAE/Cal Poly •0.80 is a typical DU
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2 DU POOR UNIFORMITY (NEVER PERFECT) GOOD UNIFORMITY Depth of Water ITRC BRAE/Cal Poly Depth of Water Efficiency Measure of water beneficially used in the Basic Irrigation Performance Term •Measure of water beneficially used in the root zone compared to the water applied •Always less than 100% •Always a percentage value ITRC BRAE/Cal Poly •If perfect scheduling, then Efficiency = DU * 100
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3 Efficiency Efficient Depth of Water Not Efficient ITRC BRAE/Cal Poly Depth of Water Destinations of Applied Irrigation Water • part goes into the ground – infiltration • part does not go into the ground ITRC BRAE/Cal Poly – evaporation – spray losses – uncollected runoff
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4 Water Destination Diagram to
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This note was uploaded on 01/13/2011 for the course BRAE 236 taught by Professor Styles during the Fall '08 term at Cal Poly.

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BRAE 236 Irrigation Eff and DU Lecture - Distribution...

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