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close this bookModern Water Control in Irrigation: Concept, Issues and Applications (WB, 1994, 116 p.)
View the document(introduction...)
View the documentRecent World Bank technical papers
View the documentIrrigation and drainage series
View the documentForeword
View the documentAcknowledgments
View the documentAbstract
Open this folder and view contentsPart I: Concepts and justifications
Open this folder and view contentsPart II: Notes on specific projects
View the documentReferences
View the documentANNEX 1: Methods of operation and structures for main and secondary irrigation distribution systems
View the documentDistributors of World Bank Publications
View the documentFriendly-user control structures

Friendly-user control structures


1. IRAN: Guilan project. Long-crested weir on Fumen canal.

2. MEXICO: Composite cross-regulator. The radial gates are used for large flow adjustments whereas the side weirs compensate normal flow fluctuations.

3. DOMINICAN REPUBLIC: Yaque del Norte project. This Begemann counter-weight gate installed upstream of a drop structure provides nearly constant level and constant flow at farm offtakes.

4. INDONESIA: Kedung Ombo Project. Sidorejo Canal. This 13 km long canal is automatically operated under downstream control.

5. Control Center.

6. A composite regulator consisting of a side weir and a remotely-controlled slide gate.

MOROCCO Haouz Irrigation Project. Canal de Rocade under dynamic regulation.

7. PERU: La Joya Irrigation District. Flow divider on the main canal.


8. CHO (Constant-Head Orifice) offtakes; Because of the relative complexity of operation.

9. Rominj gate: Because of the fluctuation of the flow rate with minor changes in the water levels of the supply canal. As shown here, sluice-gated cross-regulators combined with Rominj-gated offtakes is the worst of all combinations of structures from the hydraulic point of view.


10. Conventional design

11. Construction of long-crested weir

12. Modular distributor

Tepalcatepec-Cupatizio Project.
The conventional gated structures were modified by replacing one or two slide-gates by long-crested weirs and replacing CHO gates at offtakes by fiberglass modular distributors.

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Cover photographs by Hervlusquellec and Hans Wolter
ISBN 0-8213-2819-0