Standard

Decadal morphological evolution of the mouth zone of the Yangtze Estuary in response to human interventions. / Zhu, Chunyan; Guo, Leicheng; van Maren, Bas; Tian, Bo; Wang, Xianye; He, Qing; Wang, Zheng Bing .

In: Earth Surface Processes and Landforms, Vol. 44, No. 12, 2019, p. 2319-2332.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Zhu, C, Guo, L, van Maren, B, Tian, B, Wang, X, He, Q & Wang, ZB 2019, 'Decadal morphological evolution of the mouth zone of the Yangtze Estuary in response to human interventions' Earth Surface Processes and Landforms, vol. 44, no. 12, pp. 2319-2332. https://doi.org/10.1002/esp.4647

APA

Vancouver

Author

Zhu, Chunyan ; Guo, Leicheng ; van Maren, Bas ; Tian, Bo ; Wang, Xianye ; He, Qing ; Wang, Zheng Bing . / Decadal morphological evolution of the mouth zone of the Yangtze Estuary in response to human interventions. In: Earth Surface Processes and Landforms. 2019 ; Vol. 44, No. 12. pp. 2319-2332.

BibTeX

@article{954a05deb6af4fabbd2c239e9cddd757,
title = "Decadal morphological evolution of the mouth zone of the Yangtze Estuary in response to human interventions",
abstract = "The morphology of the Yangtze Estuary has changed substantially at decadal time scales in response to natural processes, local human interference and reduced sediment supply. Due to its high sediment load, the morphodynamic response time of the estuary is short, providing a valuable semi-natural system to evaluate large-scale estuarine morphodynamic responses to interference. Previous studies primarily addressed local morphologic changes within the estuary, but since an overall sediment balance is missing, it remains unclear whether the estuary as a whole has shifted from sedimentation to erosion in response to reduced riverine sediment supply (e.g. resulting from construction of the Three Gorges Dam). In this paper we examine the morphological changes of two large shoals in the mouth zone (i.e. the Hengsha flat and the Jiuduan shoal) using bathymetric data collected between 1953 and 2016 and a series of satellite images. We observe that the two shoals accreted at different rates before 2010 but reverted to erosion thereafter. Human activities such as dredging and dumping contribute to erosion, masking the impacts of sediment source reduction. The effects of local human intervention (such as the construction of a navigation channel) are instantaneous and are likely to have already resulted in new dynamic equilibrium conditions. The morphodynamic response time of the mouth zone to riverine sediment decrease is further suggested to be >30 years (starting from the mid-1980s). Accounting for the different adaptation time scales of various human activities is essential when interpreting morphodynamic changes in large-scale estuaries and deltas.",
keywords = "channel–shoal system, human activities, morphology, response time, Yangtze Estuary",
author = "Chunyan Zhu and Leicheng Guo and {van Maren}, Bas and Bo Tian and Xianye Wang and Qing He and Wang, {Zheng Bing}",
note = "Accepted Author Manuscript",
year = "2019",
doi = "10.1002/esp.4647",
language = "English",
volume = "44",
pages = "2319--2332",
journal = "Earth Surface Processes and Landforms",
issn = "0197-9337",
publisher = "John Wiley & Sons",
number = "12",

}

RIS

TY - JOUR

T1 - Decadal morphological evolution of the mouth zone of the Yangtze Estuary in response to human interventions

AU - Zhu, Chunyan

AU - Guo, Leicheng

AU - van Maren, Bas

AU - Tian, Bo

AU - Wang, Xianye

AU - He, Qing

AU - Wang, Zheng Bing

N1 - Accepted Author Manuscript

PY - 2019

Y1 - 2019

N2 - The morphology of the Yangtze Estuary has changed substantially at decadal time scales in response to natural processes, local human interference and reduced sediment supply. Due to its high sediment load, the morphodynamic response time of the estuary is short, providing a valuable semi-natural system to evaluate large-scale estuarine morphodynamic responses to interference. Previous studies primarily addressed local morphologic changes within the estuary, but since an overall sediment balance is missing, it remains unclear whether the estuary as a whole has shifted from sedimentation to erosion in response to reduced riverine sediment supply (e.g. resulting from construction of the Three Gorges Dam). In this paper we examine the morphological changes of two large shoals in the mouth zone (i.e. the Hengsha flat and the Jiuduan shoal) using bathymetric data collected between 1953 and 2016 and a series of satellite images. We observe that the two shoals accreted at different rates before 2010 but reverted to erosion thereafter. Human activities such as dredging and dumping contribute to erosion, masking the impacts of sediment source reduction. The effects of local human intervention (such as the construction of a navigation channel) are instantaneous and are likely to have already resulted in new dynamic equilibrium conditions. The morphodynamic response time of the mouth zone to riverine sediment decrease is further suggested to be >30 years (starting from the mid-1980s). Accounting for the different adaptation time scales of various human activities is essential when interpreting morphodynamic changes in large-scale estuaries and deltas.

AB - The morphology of the Yangtze Estuary has changed substantially at decadal time scales in response to natural processes, local human interference and reduced sediment supply. Due to its high sediment load, the morphodynamic response time of the estuary is short, providing a valuable semi-natural system to evaluate large-scale estuarine morphodynamic responses to interference. Previous studies primarily addressed local morphologic changes within the estuary, but since an overall sediment balance is missing, it remains unclear whether the estuary as a whole has shifted from sedimentation to erosion in response to reduced riverine sediment supply (e.g. resulting from construction of the Three Gorges Dam). In this paper we examine the morphological changes of two large shoals in the mouth zone (i.e. the Hengsha flat and the Jiuduan shoal) using bathymetric data collected between 1953 and 2016 and a series of satellite images. We observe that the two shoals accreted at different rates before 2010 but reverted to erosion thereafter. Human activities such as dredging and dumping contribute to erosion, masking the impacts of sediment source reduction. The effects of local human intervention (such as the construction of a navigation channel) are instantaneous and are likely to have already resulted in new dynamic equilibrium conditions. The morphodynamic response time of the mouth zone to riverine sediment decrease is further suggested to be >30 years (starting from the mid-1980s). Accounting for the different adaptation time scales of various human activities is essential when interpreting morphodynamic changes in large-scale estuaries and deltas.

KW - channel–shoal system

KW - human activities

KW - morphology

KW - response time

KW - Yangtze Estuary

UR - http://www.scopus.com/inward/record.url?scp=85067688606&partnerID=8YFLogxK

U2 - 10.1002/esp.4647

DO - 10.1002/esp.4647

M3 - Article

VL - 44

SP - 2319

EP - 2332

JO - Earth Surface Processes and Landforms

T2 - Earth Surface Processes and Landforms

JF - Earth Surface Processes and Landforms

SN - 0197-9337

IS - 12

ER -

ID: 54723728