TY - JOUR

T1 - Model-based changes in hydro-sediment dynamics induced by estuarine wetlands

AU - Lou, S.

AU - Chen, X.

AU - Chen, M.

AU - Liu, S.

AU - Zhou, S.

AU - Radnaeva, L.D.

AU - Nikitina, E.

AU - Fedorova, I.V.

N1 - Export Date: 10 November 2024 CODEN: OCMAE Сведения о финансировании: Tongji University, 0200104492, 2022-2-YB-01 Сведения о финансировании: Tongji University Сведения о финансировании: National Natural Science Foundation of China, NSFC, 42072281, 41602244 Сведения о финансировании: National Natural Science Foundation of China, NSFC Сведения о финансировании: Shenzhen Science and Technology Innovation Program, 22230712900, 22ZR1464200, 20230742500 Сведения о финансировании: Shenzhen Science and Technology Innovation Program Сведения о финансировании: Fundamental Research Funds for the Central Universities, 22120210576 Сведения о финансировании: Fundamental Research Funds for the Central Universities Сведения о финансировании: 2022-3-YB-03 Текст о финансировании 1: This study was funded by the National Natural Science Foundation of China (42072281, 41602244), Shanghai Science and Technology Innovation Projects (22230712900, 22ZR1464200), and the Nineteenth Experimental Teaching Reform Special Fund Project of Tongji University (0200104492). Текст о финансировании 2: This study was funded by the National Natural Science Foundation of China (42072281, 41602244), Shanghai Science and Technology Innovation Projects (22230712900, 22ZR1464200, 20230742500), the Fundamental Research Funds for the Central Universities (22120210576), Top Discipline Plan of Shanghai Universities-Class I (2022-3-YB-03), and Interdisciplinary Project in Ocean Research of Tongji University (2022-2-YB-01).

PY - 2024/12/1

Y1 - 2024/12/1

N2 - Wetlands not only provide abundant resources for human beings, but also play an important role in ecological balance. Wetlands are abundant in the Yangtze River Estuary (CWYE). Due to the influence of vegetation in wetlands, of which the characteristics such as vegetation density are in spatial change, the hydrodynamics and sediment transport in the CWYE are complex. Therefore, three-dimensional numerical simulations in the CWYE were conducted based on Delft3D to analyze the hydro-sediment dynamics affected by vegetation. The traditional sediment module in Delft3D, which determines sediment initiation through the bottom shear stress calculated by flow velocity, was improved considering the influence of wake turbulence caused by vegetation stem on sediment suspension. Results have shown that vegetation reduced the flow velocity which decreased the turbulence, while the wake turbulence caused by vegetation stem increased it. The sediment suspension in wetlands depended on the relationship between the decrease of turbulence caused by decreasing velocity and the increase of turbulence caused by vegetation wake turbulence. The improved model in this paper can be used for hydro-sediment dynamics simulation in coastal wetlands as well as other vegetated areas. © 2024 Elsevier Ltd

AB - Wetlands not only provide abundant resources for human beings, but also play an important role in ecological balance. Wetlands are abundant in the Yangtze River Estuary (CWYE). Due to the influence of vegetation in wetlands, of which the characteristics such as vegetation density are in spatial change, the hydrodynamics and sediment transport in the CWYE are complex. Therefore, three-dimensional numerical simulations in the CWYE were conducted based on Delft3D to analyze the hydro-sediment dynamics affected by vegetation. The traditional sediment module in Delft3D, which determines sediment initiation through the bottom shear stress calculated by flow velocity, was improved considering the influence of wake turbulence caused by vegetation stem on sediment suspension. Results have shown that vegetation reduced the flow velocity which decreased the turbulence, while the wake turbulence caused by vegetation stem increased it. The sediment suspension in wetlands depended on the relationship between the decrease of turbulence caused by decreasing velocity and the increase of turbulence caused by vegetation wake turbulence. The improved model in this paper can be used for hydro-sediment dynamics simulation in coastal wetlands as well as other vegetated areas. © 2024 Elsevier Ltd

KW - Hydrodynamics

KW - Sediment suspension

KW - The yangtze estuary wetland

KW - Three-dimensional numerical simulation

KW - Vegetation

KW - Wake turbulence

KW - Estuaries

KW - Wakes

KW - Delft3D

KW - Estuarine wetlands

KW - Estuary wetlands

KW - Model-based OPC

KW - Sediment dynamic

KW - Three-dimensional numerical simulations

KW - Yangtze Estuary

KW - Digital elevation model

KW - environmental modeling

KW - flow velocity

KW - hydrodynamics

KW - resuspension

KW - sediment transport

KW - shear stress

KW - simulation

KW - turbulence

KW - vegetation dynamics

KW - wake

KW - wetland

KW - China

UR - https://www.mendeley.com/catalogue/9411d040-3f23-3aa2-a701-33cf7ef76f21/

U2 - 10.1016/j.ocecoaman.2024.107462

DO - 10.1016/j.ocecoaman.2024.107462

M3 - статья

VL - 259

JO - Ocean and Coastal Management

JF - Ocean and Coastal Management

SN - 0964-5691

M1 - 107462

ER -