Improved implicit procedure for multichannel surge computations

• Published in: Canadian Journal of Civil Engineering
• Main Author: Kao, Kwan-Hong
• Format: Article in Journal/Newspaper
• Language: French
• Published: Canadian Science Publishing 1980
• Subjects: Peace River
• Online Access: http://dx.doi.org/10.1139/l80-058; http://www.nrcresearchpress.com/doi/pdf/10.1139/l80-058

A procedure for numbering the computation points along a system of waterways is presented for the implicit finite difference solution of open channel unsteady flow problems. In a multichannel system, with each branch watercourse being treated as one-dimensional, application of the proposed numbering procedure will produce a narrow diagonally banded coefficient matrix of simultaneous equations. An existing IBM programme, GELB, can thus be employed to solve the simultaneous equations resulting in a significant reduction both in computer storage requirements and computing time.The tailrace system of Portage Mountain Development on the Peace River, British Columbia, Canada, is a Y-shaped channel to which the proposed procedure was first succesfully applied.