Applications of Computational Fluid Dynamics to Flow Ratings at Prototype Spillways and Weirs. II: Framework for Planning, Data Assessment, and Flow Rating
Publication: Journal of Irrigation and Drainage Engineering
Volume 143, Issue 1
Abstract
Traditionally, flow-rating formulas for hydraulic structures are calibrated and validated with data comprising field measurements of discharge, water stages, and operational settings monitored in near real time. Lack of sufficient field measurements that include all flow types and cover the full operational ranges has been a major constraint in developing reliable flow ratings for prototype hydraulic structures. A companion paper introduced a plausible method that relies on computational fluid dynamics (CFD) simulations to generate accurate flow data that complements field measurements for flow rating analysis. In this paper, a general framework for applying CFD in flow rating is proposed, which includes planning of CFD simulations, assessing CFD flow data, and improving existing flow ratings using a hybrid data set of field-measured and CFD-simulated flows. Finally, two case studies of flow rating for spillways and weirs carried out to demonstrate the proposed framework are presented. Results show that the proposed framework offers a cost-effective approach that provides robust, comprehensive flow rating formulas that yield reliable flow estimates for the operation of hydraulic structures under multiple water-resource management constraints.
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Acknowledgments
The authors gratefully acknowledge the team of South Florida Water Management District charged with field flow measurements for their excellence in planning, collecting, quality assuring,and quality controlling, and archiving of field flow measurements. The valuable data they have collected over several years and the limitations they have encountered in the field to collect data representative of extreme events partly motivated the present framework.
References
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Published In
Journal of Irrigation and Drainage Engineering
Volume 143 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 23, 2015
Accepted: Jul 13, 2016
Published online: Sep 19, 2016
Published in print: Jan 1, 2017
Discussion open until: Feb 19, 2017
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