Date of Award


Degree Type


Degree Name



Civil and Environmental Engineering

First Advisor

da Silva, Ana,


Engineering, Civil.




An in-depth analysis of several methods for the determination of regime channel geometry is presented. In particular the rational method of Yalin and Silva (1999), (1997) and the semi-theoretical method of Julien and Wargadalam (1995) are analyzed and modifications are introduced in order to improve their predictive abilities and implementation. The modification of the method of Yalin and Silva, involves the use of a new dune steepness expression by Zhang (1999) introduced in order to improve the prediction of the friction factor c. The method of Julien and Wargadalam is modified through the elimination of the mobility number, Y, as an input parameter in order to render a practical solution to the system of equations presented by these authors. The effectiveness of the modifications to the methods of Yalin and Silva (1999), (1997) and Julien and Wargadalam. (1995) are evaluated, and these methods are compared with each other and with the rational method of Chang (1988) on the basis of their respective abilities to predict regime channel geometry. The modified method of Yalin and Silva and the original method by Julien and Wargadalam are identified as yielding superior results. The modified method of Yalin and Silva (1999), (1997) is used to assess the stability of streams and rivers in Ontario. These watercourses are shown to be "nearly" in regime.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2000 .A35. Source: Masters Abstracts International, Volume: 39-02, page: 0546. Adviser: Ana da Silva. Thesis (M.A.Sc.)--University of Windsor (Canada), 2000.