| OPTIMUM CHANNEL GEOMETRY AND MINIMUM ENERGY DISSIPATION RATE |
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| 作者姓名： | Chih Ted Yang and Charles C. S. Song International and Special Projects Coordinator U. S. Bureau of Reclamation Denyer Colorado U. S. A. Professor St. Anthony Falls Hydraulic Laboratory University of Minnesota MinneaPOlis Minnesota U. S. A. |
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| 作者单位： | Chih Ted Yang and Charles C. S. Song International and Special Projects Coordinator，U. S. Bureau of Reclamation，Denyer，Colorado 80225，U. S. A. Professor，St. Anthony Falls Hydraulic Laboratory，University of Minnesota，MinneaPOlis，Minnesota 55414，U. S. A. |
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| 摘 要： | 1. INTRODUCTIONA natural river adjusts its roughness, channel geometry, slope I length, and Pattern to changing hydrologic, geologic, and manmade conditions. However, some sort of mean condition or quasi-equilibriumcondition appears to exist for natural streams. The earliest attempts to describe the quasi--equlibrium geometry of rivers were the empirical approaches, such as the regime approach proposed by Lacey (1929) andLeoPOld et al. (1953 ). Later, theoretical approaches based on the…
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OPTIMUM CHANNEL GEOMETRY AND MINIMUM ENERGY DISSIPATION RATE |
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| Chih Ted Yang and Charles C. S. Song International and Special Projects Coordinator,U. S. Bureau of Reclamation,Denyer,Colorado ,U. S. A. Professor,St. Anthony Falls Hydraulic Laboratory,University of Minnesota,MinneaPOlis,Minnesota ,U. S. A..OPTIMUM CHANNEL GEOMETRY AND MINIMUM ENERGY DISSIPATION RATE[J].International Journal of Sediment Research,1990(1). |
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| Authors: | Chih Ted Yang and Charles C S Song International and Special Projects Coordinator U S Bureau of Reclamation Denyer Colorado U S A Professor St Anthony Falls Hydraulic Laboratory University of Minnesota MinneaPOlis Minnesota U S A |
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| Institution: | Chih Ted Yang and Charles C. S. Song International and Special Projects Coordinator,U. S. Bureau of Reclamation,Denyer,Colorado 80225,U. S. A. Professor,St. Anthony Falls Hydraulic Laboratory,University of Minnesota,MinneaPOlis,Minnesota 55414,U. S. A. |
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| Abstract: | The theory of minimum rate of energy dissipation in conjunction with Yang's sediment transport equation and Manning's equation for water discharge is used to derive the optimum open channel geometry. The optimum channel geometry thus derived is consistent with those based on the tractive force approach and is identical to those hosed on the least wetted perimeter for a given cross-sectional area with the maximum conveyance. laboratory and field data are used to support the theoretical analyses. |
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| Keywords: | River geometry Minimum dissipation Minimum energy Tractive force Stable channel |
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