Author(s): Habib Ahmari; Ana Maria Ferreira Da Silva
Keywords: Alternate bar; braiding; meandering; multiple bar; occurrence criteria
Abstract: The existence region plan of alternate bars, multiple bars, meandering and braiding, introduced by da Silva in 1991 and presented in its most recent form by Yalin and da Silva in the 2001 IAHR monograph Fluvial Processes, is updated and revised. For this purpose, the plan is extended by adding available laboratory and field data from the recent literature, as well as earlier data that only recently became available to the authors. Data from two series of laboratory runs conducted by the authors are also included. These were conducted to fill in a gap in the existing data, pertinent to the definition of the existence region of alternate bars. This work led to a revision to the location of the boundary lines of the existence regions of both alternate bars and meanders. An attempt was also made to reveal the existence regions of different types of multiple bars.