Two-dimensional solution for straight and meandering overbank flows

Citation
Da. Ervine et al., Two-dimensional solution for straight and meandering overbank flows, J HYDR ENG, 126(9), 2000, pp. 653-669
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF HYDRAULIC ENGINEERING-ASCE
ISSN journal
0733-9429 → ACNP
Volume
126
Issue
9
Year of publication
2000
Pages
653 - 669
Database
ISI
SICI code
0733-9429(200009)126:9<653:TSFSAM>2.0.ZU;2-J
Abstract
This paper presents a practical method to predict depth-averaged velocity a nd shear stress for straight and meandering overbank flows. An analytical s olution to the depth-integrated turbulent form of the Navier-Stokes equatio n is presented that includes lateral shear and secondary flows in addition to bed friction. The novelty of the present approach is not only its inclus ion of the secondary flows in the formulation but also its applicability to straight and meandering channels. The analytical solution is applied to a number of channels, at model and field scales, and is also compared with ot her available methods such as that of Shiono and Knight and the lateral dis tribution method. The present formulation gives much better predictions of velocity and shear stress, particularly in those cases where the secondary flows are dominant.