Confluence Scour in Coarse Braided Streams

Authors

Peter Ashmore, University of Western Ontario
Gary Parker, University of Illinois at Urbana-Champaign

Document Type

Article

Publication Date

4-1983

Volume

19

Issue

2

Journal

Water Resources Research

First Page

392

Last Page

402

URL with Digital Object Identifier

10.1029/WR019i002p00392

Abstract

Laboratory models of a braided valley flat in coarse material were used in conjunction with field data to study confluence scour at braid anabranches. Correct prediction of the depth of scour is required for the design of buried pipeline crossings. Braid pattern and anabranches constantly shift and avulse so that scour holes have definable lifetimes. Although the scatter is large, the depth of water in the scour hole depends on confluence and relative anabranch discharge; this depth can be as high as six times the ambient depths in the anabranches.

Notes

10.1029/WR019i002p00392