Author(s): Cyrus Ershadi; Eric M. Valentine
Linked Author(s):
Keywords: Self-formed channels; Rational regime method; Bank stability; Sediment transport
Abstract: White, Bettess and Paris (1982) presented a rational regime approach for the design of straight stable trapezoidal channels. However, research has shown that this method under- predicts alluvial channel width and over predicts alluvial channel depth, particularly for narrow channels. The method has been recently been modified by Eaton and Millar (2004). They applied a bank stability constraint incorporated in the White et al (1982) rational approach. In the study reported here, the results of small-scale laboratory experiments have been used to assess this modification. The result of this application shows that using a combination of the concept of sediment maximisation and bank stability constraint provides a good prediction for the channel dimensions (channel width and depth). It was also found that although this method can predict the channel dimensions very well, it is weak in predicting sediment transport rate.
Year: 2005