Mechanical‐Hydraulic Dual‐Acting Controller for Canal Level or Discharge Rate
Publication: Journal of Irrigation and Drainage Engineering
Volume 113, Issue 1
Abstract
A control device has been developed for canal structures, which can be used to control upstream water levels, downstream water level, or off‐take canal discharges. The system uses no electrical power or electronics. It is powered by the available drop in water level across the structure. It can control water levels to within a very narrow band [ (0.01 ft) for the systems tested], which is not feasible with electrically controlled motorized gates. Since this level of water surface control is often necessary for accurate flow rate control when weirs and flumes are used, this device, called dual‐acting controlled‐leak, or DACL, is particularly suited to control of canal flow rates. The DACL system was studied in a hydraulics laboratory to determine the relevant factors affecting control. A field test was conducted on a radial gate [1.9‐m (6.2‐ft) radius] to study the system's reliability in actual field operation.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 113 • Issue 1 • February 1987
Pages: 69 - 85
Copyright
Copyright © 1987 ASCE.
History
Published online: Feb 1, 1987
Published in print: Feb 1987
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