Gravity-fed drip irrigation design procedure for a single-manifold subunit

A simple procedure was developed for the design of low-cost, gravity-fed, drip irrigation single-manifold subunits in hilly areas with laterals to one or both sides of the manifold. The allowable pressure head variation in the manifold and laterals is calculated individually for different pressure z...

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Bibliographic Details
Published in:Irrigation science 2010-05, Vol.28 (4), p.359-369
Main Authors: Wu, P. T, Zhu, D. L, Wang, J
Format: Article
Language:English
Subjects:
Agricultural production
Agriculture
Aquatic Pollution
Biomedical and Life Sciences
Climate Change
Design engineering
Drip irrigation
Environment
Fluid dynamics
Irrigation
Irrigation design
Life Sciences
Original Paper
Pressure head
Sustainable Development
Waste Water Technology
Water Industry/Water Technologies
Water Management
Water Pollution Control
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Summary:A simple procedure was developed for the design of low-cost, gravity-fed, drip irrigation single-manifold subunits in hilly areas with laterals to one or both sides of the manifold. The allowable pressure head variation in the manifold and laterals is calculated individually for different pressure zones, and the manifold subunit design is divided into independent processes for laterals and manifold. In the manifold design, a two-stage optimal design method is used. In the first design stage, the pipe cost is minimized and a set of optimal manifold pipe diameters is obtained. In the second design stage, a partial list of available diameters is prepared based on the calculated optimal diameters, and the lengths for available diameters and pressure head of every lateral location along the manifold are calculated. The size of each of the pressure sections is determined according to the pressure head distribution along the manifold. Using the proposed methodology, the minimum manifold pipe cost is obtained, and the target emission uniformity is satisfied for gravity-fed drip irrigation subunits.
ISSN:0342-7188
1432-1319
DOI:10.1007/s00271-009-0196-6