Field scale test of multi-dimensional flow and morphodynamic simulations used for restoration design analysis

By: , and 
Edited by: George ConstantinescuMarcelo H. Garcia, and Dan Hanes

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Abstract

Two- and three-dimensional morphodynamic simulations are becoming common in studies of channel form and process. The performance of these simulations are often validated against measurements from laboratory studies. Collecting channel change information in natural settings for model validation is difficult because it can be expensive and under most channel forming flows the resulting channel change is generally small. Several channel restoration projects designed in part to armor large meanders with several large spurs constructed of wooden piles on the Kootenai River, ID, have resulted in rapid bed elevation change following construction. Monitoring of these restoration projects includes post- restoration (as-built) Digital Elevation Models (DEMs) as well as additional channel surveys following high channel forming flows post-construction. The resulting sequence of measured bathymetry provides excellent validation data for morphodynamic simulations at the reach scale of a real river. In this paper we test the performance a quasi-three-dimensional morphodynamic simulation against the measured elevation change. The resulting simulations predict the pattern of channel change reasonably well but many of the details such as the maximum scour are under predicted.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Field scale test of multi-dimensional flow and morphodynamic simulations used for restoration design analysis
ISBN 9781138029132
Year Published 2016
Language English
Publisher CRC Press
Contributing office(s) National Research Program - Central Branch
Description 9 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title RiverFlow 2016
First page 1390
Last page 1398