Channel Flow Measurement Using Portable Conical Central Baffle
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 145, Issue 11
Abstract
An analytically derived discharge prediction model for a conical mobile flume, referred to as a conical central baffle (CCB), is presented. The flume is suitable for use in small rectangular channels in agricultural fields or wastewater channels. The flume consists of a cone-shaped object positioned axially in a nearly horizontal prismatic open rectangular channel to produce a venturi effect. The conical obstruction has good stability against the water current owing to its lower center of gravity and can measure a wider range of flows due to its similarity to a V-notch weir. The presence of a conical obstruction alters the cross-section of a rectangular channel at different locations, which requires development of parameters related to the geometry of the cone and channel. A model was proposed to predict flow rates in the channel using the energy concept. The proposed model was tested and modified using different laboratory flumes for various flow rates. The flow rate values obtained using the proposed approach produced an error within 9% when compared with the actual flow rates. The experimental results thus validated the developed model. This flume can be used as a mobile measuring device for temporary flow measurements in small rectangular open channels with the presented approach.
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Journal of Irrigation and Drainage Engineering
Volume 145 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 27, 2018
Accepted: Jul 15, 2019
Published online: Sep 10, 2019
Published in print: Nov 1, 2019
Discussion open until: Feb 10, 2020
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