Next Article in Journal
Performance Analysis of Ageing Single-Jet Water Meters for Measuring Residential Water Consumption
Next Article in Special Issue
Observation of the Dynamics and Horizontal Dispersion in a Shallow Intermittently Closed and Open Lake and Lagoon (ICOLL)
Previous Article in Journal
Integrated Evaluation of Hybrid Water Supply Systems Using a PROMETHEE–GAIA Approach
Previous Article in Special Issue
A Methodology for Measuring Microplastic Transport in Large or Medium Rivers
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Water 2018, 10(5), 611; https://doi.org/10.3390/w10050611

An Unstructured-Grid Based Morphodynamic Model for Sandbar Simulation in the Modaomen Estuary, China

Department of Water Resources and Environment, Pearl River Hydraulic Research Institute, Guangzhou 510611, China
*
Author to whom correspondence should be addressed.
Received: 23 March 2018 / Revised: 29 April 2018 / Accepted: 4 May 2018 / Published: 8 May 2018
Full-Text   |   PDF [6220 KB, uploaded 15 May 2018]   |  

Abstract

The Modaomen Estuary is the most important passageway in discharging flood and sediment of the Pearl River Delta, which is one of the most complex estuarine systems in China. Due to the coupling effect among tidal currents, waves, and sediments, an immense sandbar area evolved in the outer subaqueous delta, impeding the flood releasing during wet season, as well as salinity intrusion during the dry season. In this work, an unstructured-grid based morphodynamic model was proposed to simulate the sandbar evolution process in the Modaomen Estuary. The proposed model was constructed by using the two-dimensional shallow water equations for tidal flow, the advection-diffusion equations for salinity and suspended sediment transport, and the non-equilibrium formulation of the Exner equation for bed evolution. To simulate the wave-induced longshore currents in the Modaomen Estuary, an adaptive time-stepping approach was proposed to couple the unstructured-grid based Simulating WAves Nearshore (SWAN) model and the shallow flow model. An integrated solver is proposed for computing flow, salinity, and sediment transport fluxes simultaneously, and then the shallow water equations and advection-diffusion equations are jointly solved by a high-resolution, unstructured-grid Godunov method. Application of the model to the Modaomen Estuary, using calibrated parameter values, gives results comparable to the measured data. The butterfly shape of the sandbar in the Modaomen Estuary is considerably well simulated by the proposed model, which matches well with the measured topography. View Full-Text
Keywords: morphodynamic model; Godunov method; sandbar simulation; Modaomen Estuary; Pearl River morphodynamic model; Godunov method; sandbar simulation; Modaomen Estuary; Pearl River
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Hu, X.; Yang, F.; Song, L.; Wang, H. An Unstructured-Grid Based Morphodynamic Model for Sandbar Simulation in the Modaomen Estuary, China. Water 2018, 10, 611.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top