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Experimental assessment of a modified rational regime theory

Ershadi, Cyrus and Valentine, Eric M. (2005). Experimental assessment of a modified rational regime theory. In: Byong-Ho Jun, San-II Lee, II Won Seo and Gye-Woon Choi XXXI International Association of Hydraulic Engineering and Research, Seoul, Korea, 11-16 September 2005.

Document type: Conference Paper
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IRMA ID 78668828xPUB1
Author Ershadi, Cyrus
Valentine, Eric M.
Title Experimental assessment of a modified rational regime theory
Conference Name XXXI International Association of Hydraulic Engineering and Research
Conference Location Seoul, Korea
Conference Dates 11-16 September 2005
Conference Publication Title Proceedings of XXXI IAHR Congress: Water Engineering for the Future-Choices and Challenges
Editor Byong-Ho Jun
San-II Lee
II Won Seo
Gye-Woon Choi
Place of Publication Seoul, Korea
Publisher Korea Water Resources Association
Publication Year 2005
Volume Number 1
ISBN 9788987898247 ; 89-87898-24-5   (check CDU catalogue open catalogue search in new window)
Start Page 1346
End Page 1355
Total Pages 10
Field of Research 0905 - Civil Engineering
HERDC Category E1 - Conference Publication (DEST)
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. This 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.
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