Interrelationships of Irrigation Uniformity Terms
Publication: Journal of Irrigation and Drainage Engineering
Volume 109, Issue 3
Abstract
Irrigation uniformities are examined for six assumed statistical distributions of depth of water infiltrated. Christiansen's uniformity (UC) and the lower quarter distribution uniformity (DU) are related analytically to the coefficient of variability (CV) in each case. The distributions chosen are the normal, log normal, uniform, a specialized power, beta and gamma distributions. In all cases studied, for CV values of less than 25%, approximate forms of UC and DU were found valid. Three examples are given using the specialized power and beta distribution. It is demonstrated that the specialized power function is exact for level basin irrigation provided the surface water advance is proportional to a power of time and the intake rate everywhere has approached a constant value before recession.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 109 • Issue 3 • September 1983
Pages: 317 - 332
Copyright
Copyright © 1983 ASCE.
History
Published online: Sep 1, 1983
Published in print: Sep 1983
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