Roughness Coefficient of Micro-irrigation Laterals
A micro-irrigation system' must apply water and fertilizer uniformly over the entire field. However friction loss in pipes and fittings, and differences in elevation cause water pressure to vary. Discharge variations due to pressure differences and manufacturing variations cause non-uniformity...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
1994
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/3154/ http://psasir.upm.edu.my/id/eprint/3154/1/Roughness_Coefficient_of_Micro-irrigation_Laterals.pdf |
| Summary: | A micro-irrigation system' must apply water and fertilizer uniformly over the entire field. However friction loss in pipes and fittings, and differences in elevation
cause water pressure to vary. Discharge variations due to pressure differences and manufacturing variations cause non-uniformity of irrigation. To assure
maximum economy, the hydraulic design of the system must be adequately evaluated for the required level of uniformity. This paper presents results of
laboratory tests for head loss in smooth polyethylene pipe fitted with insert emitters. The Hazen-Williams roughness coefficients are included in the friction
factor-Reynolds number diagrams so that system designers may choose a more accurate friction coefficient to improve energy, water and material use efficiency of a micro-irrigation system. |
|---|