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A two-dimensional hydro-morphological model for river hydraulics and morphology with vegetation

Lookup NU author(s): Professor Qiuhua Liang

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).

Abstract

This work develops a two-dimensional hydro-morphological model which can be used to simulate river hydraulics and morphology with various vegetation covers. The model system consists of five modules, including a hydrodynamic model, a sediment transport model, a vegetation model, a bank failure model and a bed deformation model. The secondary flow effects are incorporated through additional dispersion terms. The core components of the model system solve the full shallow water equations; this is coupled with a non-equilibrium sediment transport model. The new integrated model system is validated against a number of laboratory-scale test cases and then applied to a natural river. The satisfactory simulation results confirm the model's capability in reproducing both stream hydraulics and channel morphological changes with vegetation. Several hypothetical simulations indicate that the model can be used not only to predict flooding and morphological evolution with vegetation, but also to assess river restoration involving vegetation.

Publication metadata

Author(s): Guan M, Liang Q

Publication type: Article

Publication status: Published

Journal: Environmental Modelling & Software

Year: 2017

Volume: 88

Pages: 10-21

Print publication date: 01/02/2017

Online publication date: 16/11/2016

Acceptance date: 08/11/2016

Date deposited: 30/11/2016

ISSN (print): 1364-8152

ISSN (electronic): 1873-6726

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.envsoft.2016.11.008

DOI: 10.1016/j.envsoft.2016.11.008

Notes: Vegetation effects; Non-equilibrium sediment transport model; River hydraulics; Morphological changes; Shallow water equations

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