Evaluation of the PG method for modeling unsteady flows in complex bathymetries. Issue 2 (3rd April 2018)

• Record Type: Journal Article
• Authors: Leon, Arturo S.; Gifford-Miears, Christopher
• Is Part Of: Journal of applied water engineering and research. Volume 6:Issue 2(2018)
• Page Start: 139
• Page End: 149
• Publication Date: 2018-04-03
• Subjects: complex river bathymetry -- hydraulic routing -- numerical modeling -- performance graph -- unsteady flow -- two-dimensional modeling; Water-supply engineering -- Periodicals; Water-supply engineering; Periodicals; 627.05
• DOI: 10.1080/23249676.2017.1287017
• Languages: English
• ISSNs: 2324-9676

Abstract

Abstract : The performance graph (PG) hydraulic routing method has been shown to be accurate, numerically efficient, and robust for unsteady flow routing. However, up to present, the PGs are constructed using one-dimensional (1D) steady flow models only, which are often questioned when simulating flows through complex bathymetries. This paper investigates whether the PG method can still be used when utilizing two-dimensional (2D) models for the construction of PGs. The test case is a stretch around an island in the Fraser River in British Columbia. The results show that the PG method is still applicable when utilizing a 2D steady flow model. The results also show that once the PGs are constructed, the PG routing method (1D and 2D) is computationally more efficient than the unsteady HEC-RAS model and can be several orders of magnitude faster than TELEMAC-2D.