Optimal Estimation of Roughness in Open-Channel Flows
Publication: Journal of Hydraulic Engineering
Volume 126, Issue 4
Abstract
The inverse problem of estimating the open-channel flow roughness is solved using an embedded optimization model. Measurement data for flow depths and discharges at several locations and times are used as inputs to the optimization model. The nonlinear optimization model embeds the finite-difference approximations of the governing equations for unsteady flow in an open channel as equality constraints. The Sequential Quadratic Programming Algorithm is used to solve the optimization model. The performance of the proposed parameter estimation model is evaluated for different scenarios of data availability and noise in flow measurement data. Solution results for illustrative problems indicate the potential applicability of the proposed model.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 126 • Issue 4 • April 2000
Pages: 299 - 303
History
Received: Jul 29, 1997
Published online: Apr 1, 2000
Published in print: Apr 2000
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