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.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Becker, L., and Yeh, W. W.-G. (1972). “Identification of parameters in unsteady open channel flows.” Water Resour. Res., 8(4), 956–965.
2.
Becker, L., and Yeh, W. W.-G. (1973). “The identification of multiple reach channel parameters.” Water Resour. Res., 9(2), 326–335.
3.
Fread, D. L., and Smith, G. G. (1978). “Calibration techniques for 1-D unsteady flow models.”J. Hydr. Div., ASCE, 104(7), 1027–1043.
4.
Powell, M. J. D. ( 1974). “Introduction to constrained optimization.” Numerical methods for constrained optimization, P. E. Gill and W. Murray, eds., Academic Press, London, 1–28.
5.
Ramesh, R. ( 1997). “Optimal estimation of roughness in open channel flows,” MS thesis, Dept. of Civ. Engrg., Indian Institute of Technology, Kanpur, India.
6.
Urquhart, W. J. (1975). Hydraulics: engineering field manual. U.S. Department of Agriculture, Soil Conservation Service, Washington, D.C.
7.
Wasantha Lal, A. M. (1995). “Calibration of riverbed roughness.”J. Hydr. Engrg., ASCE, 121(9), 664–671.
8.
Willis, R., and Yeh, W. W.-G. (1987). Groundwater systems planning and management. Prentice Hall, Englewood Cliffs, N.J.
Information & Authors
Information
Published In
History
Received: Jul 29, 1997
Published online: Apr 1, 2000
Published in print: Apr 2000
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.