Sediment transport in a shallow coastal region following severe flood events

Yingying Yu, Hong Zhang, Charles Lemckert

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Severe floods usually result in harmful sediment and pollutant dispersion in shallow coastal regions. This study therefore presents a three-dimensional hydrodynamic and transport model investigation into the sediment transport behaviour following severe flooding which occurred in the Brisbane River catchment. It was found that the flood-driven sediment plume formed in the adjacent Moreton Bay and then spread into the northern part of the bay. Based on analysis of the variations in horizontal sediment flux, four distinct characteristics of sediment transport were identified, corresponding to the combined effects of flooding runoff and tidal currents. Firstly, within the estuary, sediment was driven by the flood discharge and primarily transported in the seaward direction. Secondly, at the river mouth, the transport pattern of the sediment was similar that of the first region, however, the horizontal flux was significantly smaller by 50%. Thirdly, a short distance from the river mouth, variations occurred not only in magnitude but also in transport pattern. Lastly, within the coastal bay, the sediment transport was mainly driven by tides, resulting in the changing direction of sediment movement. It was estimated that approximately 1.01 × 106 tonnes was discharged from the Brisbane River estuary into the bay during the flood event in January 2011. This study exhibited the characteristics of sediment transport within a tidal dominant estuary following a severe flood event. The results would be used to assist the implementation of coastal management strategies.

Original languageEnglish
Pages (from-to)1233-1253
Number of pages21
JournalEnvironmental Fluid Mechanics
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Dec 2017

Fingerprint

Sediment transport
sediment transport
Sediments
Estuaries
Rivers
sediment
estuary
river
flooding
Fluxes
Tides
coastal zone management
tidal current
Runoff
Catchments
tide
Hydrodynamics
plume
hydrodynamics
catchment

Cite this

@article{ab4bd439f49a4945941db17b45310c6f,
title = "Sediment transport in a shallow coastal region following severe flood events",
abstract = "Severe floods usually result in harmful sediment and pollutant dispersion in shallow coastal regions. This study therefore presents a three-dimensional hydrodynamic and transport model investigation into the sediment transport behaviour following severe flooding which occurred in the Brisbane River catchment. It was found that the flood-driven sediment plume formed in the adjacent Moreton Bay and then spread into the northern part of the bay. Based on analysis of the variations in horizontal sediment flux, four distinct characteristics of sediment transport were identified, corresponding to the combined effects of flooding runoff and tidal currents. Firstly, within the estuary, sediment was driven by the flood discharge and primarily transported in the seaward direction. Secondly, at the river mouth, the transport pattern of the sediment was similar that of the first region, however, the horizontal flux was significantly smaller by 50{\%}. Thirdly, a short distance from the river mouth, variations occurred not only in magnitude but also in transport pattern. Lastly, within the coastal bay, the sediment transport was mainly driven by tides, resulting in the changing direction of sediment movement. It was estimated that approximately 1.01 × 106 tonnes was discharged from the Brisbane River estuary into the bay during the flood event in January 2011. This study exhibited the characteristics of sediment transport within a tidal dominant estuary following a severe flood event. The results would be used to assist the implementation of coastal management strategies.",
keywords = "Moreton Bay, Numerical modelling, Queensland floods 2010–2011, Sediment plume, The Brisbane River estuary, Queensland floods 2010-2011",
author = "Yingying Yu and Hong Zhang and Charles Lemckert",
year = "2017",
month = "12",
day = "1",
doi = "10.1007/s10652-017-9546-8",
language = "English",
volume = "17",
pages = "1233--1253",
journal = "Environmental Fluid Mechanics",
issn = "1567-7419",
publisher = "Springer",
number = "6",

}

Sediment transport in a shallow coastal region following severe flood events. / Yu, Yingying; Zhang, Hong; Lemckert, Charles.

In: Environmental Fluid Mechanics, Vol. 17, No. 6, 01.12.2017, p. 1233-1253.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sediment transport in a shallow coastal region following severe flood events

AU - Yu, Yingying

AU - Zhang, Hong

AU - Lemckert, Charles

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Severe floods usually result in harmful sediment and pollutant dispersion in shallow coastal regions. This study therefore presents a three-dimensional hydrodynamic and transport model investigation into the sediment transport behaviour following severe flooding which occurred in the Brisbane River catchment. It was found that the flood-driven sediment plume formed in the adjacent Moreton Bay and then spread into the northern part of the bay. Based on analysis of the variations in horizontal sediment flux, four distinct characteristics of sediment transport were identified, corresponding to the combined effects of flooding runoff and tidal currents. Firstly, within the estuary, sediment was driven by the flood discharge and primarily transported in the seaward direction. Secondly, at the river mouth, the transport pattern of the sediment was similar that of the first region, however, the horizontal flux was significantly smaller by 50%. Thirdly, a short distance from the river mouth, variations occurred not only in magnitude but also in transport pattern. Lastly, within the coastal bay, the sediment transport was mainly driven by tides, resulting in the changing direction of sediment movement. It was estimated that approximately 1.01 × 106 tonnes was discharged from the Brisbane River estuary into the bay during the flood event in January 2011. This study exhibited the characteristics of sediment transport within a tidal dominant estuary following a severe flood event. The results would be used to assist the implementation of coastal management strategies.

AB - Severe floods usually result in harmful sediment and pollutant dispersion in shallow coastal regions. This study therefore presents a three-dimensional hydrodynamic and transport model investigation into the sediment transport behaviour following severe flooding which occurred in the Brisbane River catchment. It was found that the flood-driven sediment plume formed in the adjacent Moreton Bay and then spread into the northern part of the bay. Based on analysis of the variations in horizontal sediment flux, four distinct characteristics of sediment transport were identified, corresponding to the combined effects of flooding runoff and tidal currents. Firstly, within the estuary, sediment was driven by the flood discharge and primarily transported in the seaward direction. Secondly, at the river mouth, the transport pattern of the sediment was similar that of the first region, however, the horizontal flux was significantly smaller by 50%. Thirdly, a short distance from the river mouth, variations occurred not only in magnitude but also in transport pattern. Lastly, within the coastal bay, the sediment transport was mainly driven by tides, resulting in the changing direction of sediment movement. It was estimated that approximately 1.01 × 106 tonnes was discharged from the Brisbane River estuary into the bay during the flood event in January 2011. This study exhibited the characteristics of sediment transport within a tidal dominant estuary following a severe flood event. The results would be used to assist the implementation of coastal management strategies.

KW - Moreton Bay

KW - Numerical modelling

KW - Queensland floods 2010–2011

KW - Sediment plume

KW - The Brisbane River estuary

KW - Queensland floods 2010-2011

UR - http://www.scopus.com/inward/record.url?scp=85028026018&partnerID=8YFLogxK

U2 - 10.1007/s10652-017-9546-8

DO - 10.1007/s10652-017-9546-8

M3 - Article

VL - 17

SP - 1233

EP - 1253

JO - Environmental Fluid Mechanics

JF - Environmental Fluid Mechanics

SN - 1567-7419

IS - 6

ER -