Numerical prediction of medium-term tidal flat evolution in the Yangtze Estuary: impacts of the Three Gorges project

Cuiping Kuang, Xu Liu, Jie Gu, Yakun Guo, Shichang Huang, Weiwei Yu, Jing Huang, Bo Sun

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A two-dimensional (2-D) numerical model and a three-dimensional (3-D) numerical model of the Yangtze Estuary, including tidal flow, suspended sediment transport and bed evolution, were established based on the Delft3D-FLOW model respectively. The models were calibrated with the field data. The calibrated models were employed to predict the morphological evolution process of the Yangtze Estuary for the next 20 years, with the predicted area covering the Chongming Eastern Beach and the Nanhui Tidal Flat. According to the simulated results in the medium term, due to the progress of the Three Gorges, erosion will happen in the southeast and south region and deposition will happen in the northeast and north region of the Chongming Eastern Beach, while a deep channel will be formed gradually in the middle part. The Nanhui Tidal Flat will develop southeastwards. Five scenarios of different river discharges and sediment loads are obtained from an exponential regression equation between flow rate and suspended sediment concentration deduced from the monthly averaged flow rate and suspended sediment concentration during 2003–2009. These five scenarios were used for investigating the topographic responses of the Chongming Eastern Beach and the Nanhui Tidal Flat to different river discharge and sediment supply conditions. The predictions show that the erosion rate will decrease and the deposition rate will increase with the increase of sediment supply, i.e., less the sediment supply leads to more recession.
Original languageEnglish
Pages (from-to)12-26
Number of pages15
JournalContinental Shelf Research
Volume52
Early online date2 Nov 2012
DOIs
Publication statusPublished - 1 Jan 2013

Fingerprint

tidal flat
gorge
suspended sediment
beach
estuaries
estuary
river discharge
fluvial deposit
prediction
beaches
sediments
erosion rate
sediment
sediment transport
rivers
erosion
project
rate

Keywords

  • numerical model
  • the Yangtze estuary
  • the Three Gorges project
  • tidal flat evolution
  • Chongming eastern beach
  • Nanhui tidal flat

Cite this

Numerical prediction of medium-term tidal flat evolution in the Yangtze Estuary : impacts of the Three Gorges project. / Kuang, Cuiping; Liu, Xu; Gu, Jie; Guo, Yakun; Huang, Shichang; Yu, Weiwei; Huang, Jing; Sun, Bo.

In: Continental Shelf Research, Vol. 52, 01.01.2013, p. 12-26.

Research output: Contribution to journalArticle

Kuang, Cuiping ; Liu, Xu ; Gu, Jie ; Guo, Yakun ; Huang, Shichang ; Yu, Weiwei ; Huang, Jing ; Sun, Bo. / Numerical prediction of medium-term tidal flat evolution in the Yangtze Estuary : impacts of the Three Gorges project. In: Continental Shelf Research. 2013 ; Vol. 52. pp. 12-26.
@article{5497aea23ad94fa9b92f81ac457f089f,
title = "Numerical prediction of medium-term tidal flat evolution in the Yangtze Estuary: impacts of the Three Gorges project",
abstract = "A two-dimensional (2-D) numerical model and a three-dimensional (3-D) numerical model of the Yangtze Estuary, including tidal flow, suspended sediment transport and bed evolution, were established based on the Delft3D-FLOW model respectively. The models were calibrated with the field data. The calibrated models were employed to predict the morphological evolution process of the Yangtze Estuary for the next 20 years, with the predicted area covering the Chongming Eastern Beach and the Nanhui Tidal Flat. According to the simulated results in the medium term, due to the progress of the Three Gorges, erosion will happen in the southeast and south region and deposition will happen in the northeast and north region of the Chongming Eastern Beach, while a deep channel will be formed gradually in the middle part. The Nanhui Tidal Flat will develop southeastwards. Five scenarios of different river discharges and sediment loads are obtained from an exponential regression equation between flow rate and suspended sediment concentration deduced from the monthly averaged flow rate and suspended sediment concentration during 2003–2009. These five scenarios were used for investigating the topographic responses of the Chongming Eastern Beach and the Nanhui Tidal Flat to different river discharge and sediment supply conditions. The predictions show that the erosion rate will decrease and the deposition rate will increase with the increase of sediment supply, i.e., less the sediment supply leads to more recession.",
keywords = "numerical model, the Yangtze estuary, the Three Gorges project, tidal flat evolution, Chongming eastern beach, Nanhui tidal flat",
author = "Cuiping Kuang and Xu Liu and Jie Gu and Yakun Guo and Shichang Huang and Weiwei Yu and Jing Huang and Bo Sun",
year = "2013",
month = "1",
day = "1",
doi = "10.1016/j.csr.2012.10.006",
language = "English",
volume = "52",
pages = "12--26",
journal = "Continental Shelf Research",
issn = "0278-4343",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

TY - JOUR

T1 - Numerical prediction of medium-term tidal flat evolution in the Yangtze Estuary

T2 - impacts of the Three Gorges project

AU - Kuang, Cuiping

AU - Liu, Xu

AU - Gu, Jie

AU - Guo, Yakun

AU - Huang, Shichang

AU - Yu, Weiwei

AU - Huang, Jing

AU - Sun, Bo

PY - 2013/1/1

Y1 - 2013/1/1

N2 - A two-dimensional (2-D) numerical model and a three-dimensional (3-D) numerical model of the Yangtze Estuary, including tidal flow, suspended sediment transport and bed evolution, were established based on the Delft3D-FLOW model respectively. The models were calibrated with the field data. The calibrated models were employed to predict the morphological evolution process of the Yangtze Estuary for the next 20 years, with the predicted area covering the Chongming Eastern Beach and the Nanhui Tidal Flat. According to the simulated results in the medium term, due to the progress of the Three Gorges, erosion will happen in the southeast and south region and deposition will happen in the northeast and north region of the Chongming Eastern Beach, while a deep channel will be formed gradually in the middle part. The Nanhui Tidal Flat will develop southeastwards. Five scenarios of different river discharges and sediment loads are obtained from an exponential regression equation between flow rate and suspended sediment concentration deduced from the monthly averaged flow rate and suspended sediment concentration during 2003–2009. These five scenarios were used for investigating the topographic responses of the Chongming Eastern Beach and the Nanhui Tidal Flat to different river discharge and sediment supply conditions. The predictions show that the erosion rate will decrease and the deposition rate will increase with the increase of sediment supply, i.e., less the sediment supply leads to more recession.

AB - A two-dimensional (2-D) numerical model and a three-dimensional (3-D) numerical model of the Yangtze Estuary, including tidal flow, suspended sediment transport and bed evolution, were established based on the Delft3D-FLOW model respectively. The models were calibrated with the field data. The calibrated models were employed to predict the morphological evolution process of the Yangtze Estuary for the next 20 years, with the predicted area covering the Chongming Eastern Beach and the Nanhui Tidal Flat. According to the simulated results in the medium term, due to the progress of the Three Gorges, erosion will happen in the southeast and south region and deposition will happen in the northeast and north region of the Chongming Eastern Beach, while a deep channel will be formed gradually in the middle part. The Nanhui Tidal Flat will develop southeastwards. Five scenarios of different river discharges and sediment loads are obtained from an exponential regression equation between flow rate and suspended sediment concentration deduced from the monthly averaged flow rate and suspended sediment concentration during 2003–2009. These five scenarios were used for investigating the topographic responses of the Chongming Eastern Beach and the Nanhui Tidal Flat to different river discharge and sediment supply conditions. The predictions show that the erosion rate will decrease and the deposition rate will increase with the increase of sediment supply, i.e., less the sediment supply leads to more recession.

KW - numerical model

KW - the Yangtze estuary

KW - the Three Gorges project

KW - tidal flat evolution

KW - Chongming eastern beach

KW - Nanhui tidal flat

U2 - 10.1016/j.csr.2012.10.006

DO - 10.1016/j.csr.2012.10.006

M3 - Article

VL - 52

SP - 12

EP - 26

JO - Continental Shelf Research

JF - Continental Shelf Research

SN - 0278-4343

ER -