A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical investigation of a sandbar formation and evolution in a tide-dominated estuary using a hydro-morphodynamic model
This paper presents a numerical study on ‘sandbar’ feature in a tide-dominated symmetrical funnel-shaped estuary using a hydro-morphodynamic model. A series of benchmark flows is simulated to demonstrate the capabilities of the model (e.g., well-balanced property, treating wet/dry fronts, shock-capturing ability), and the good quantitative accuracy. Afterwards, the model is applied for systematic numerical case studies. The main geometrical parameters, the upstream and boundary conditions are specified with reference to the Qiantang River Estuary (QRE), where a giant ‘sandbar’ is well known. It is shown that a maximum turbidity zone forms due to interactions of the riverine discharge and the tidal flow. Strong deposition occurs in the maximum turbidity zone, whereas erosion occurs otherwise. This results in a sandbar of comparable magnitude and position with the observed ‘sandbar’ in the QRE. As the sandbar grows, a slight increasing trend followed by a rapid decreasing trend for the difference between high and low water levels is established. A larger riverine discharge leads to a sandbar more closer to the seaside, but effect of the seasonal discharge variation is limited. Erodibility of bed and seaside sediment input mainly influence the height of the formed sandbar.
Numerical investigation of a sandbar formation and evolution in a tide-dominated estuary using a hydro-morphodynamic model
This paper presents a numerical study on ‘sandbar’ feature in a tide-dominated symmetrical funnel-shaped estuary using a hydro-morphodynamic model. A series of benchmark flows is simulated to demonstrate the capabilities of the model (e.g., well-balanced property, treating wet/dry fronts, shock-capturing ability), and the good quantitative accuracy. Afterwards, the model is applied for systematic numerical case studies. The main geometrical parameters, the upstream and boundary conditions are specified with reference to the Qiantang River Estuary (QRE), where a giant ‘sandbar’ is well known. It is shown that a maximum turbidity zone forms due to interactions of the riverine discharge and the tidal flow. Strong deposition occurs in the maximum turbidity zone, whereas erosion occurs otherwise. This results in a sandbar of comparable magnitude and position with the observed ‘sandbar’ in the QRE. As the sandbar grows, a slight increasing trend followed by a rapid decreasing trend for the difference between high and low water levels is established. A larger riverine discharge leads to a sandbar more closer to the seaside, but effect of the seasonal discharge variation is limited. Erodibility of bed and seaside sediment input mainly influence the height of the formed sandbar.
Numerical investigation of a sandbar formation and evolution in a tide-dominated estuary using a hydro-morphodynamic model
Hu, Peng (author) / Han, Jianjian (author) / Li, Wei (author) / Sun, Zhilin (author) / He, Zhiguo (author)
Coastal Engineering Journal ; 60 ; 466-483
2018-10-02
18 pages
Article (Journal)
Electronic Resource
English
An Unstructured-Grid Based Morphodynamic Model for Sandbar Simulation in the Modaomen Estuary, China
| DOAJ | 2018
Bayesian Model Selection for hydro-morphodynamic models
| DataCite | 2017
A Morphodynamic Model for River and Estuary Management
| ASCE | 1999
NUMERICAL MODELLING OF THE MORPHODYNAMIC EVOLUTION OF SAND BANKS IN THE GIRONDE ESTUARY
| British Library Conference Proceedings | 2007
Hydro - Morphodynamic Modeling of Groin Fields
| British Library Conference Proceedings | 1999