The Longitudinal Profile of a Prograding River and Its Response to Sea Level Rise

Journal article (2020)

Authors

Weilun Gao Ministry of Education, Shandong, Beijing Normal University
Dongxue Li Beijing Normal University, Ministry of Education, Shandong
Zhengbing Wang Deltares, Beijing Normal University, Coastal Engineering - CEG
William Nardin University of Maryland Center for Environmental Science
Dongdong Shao Beijing Normal University, Ministry of Education, Shandong
Tao Sun Beijing Normal University, Ministry of Education, Shandong
Beijing University Beijing Normal University
Baoshan Cui Ministry of Education, Shandong, Beijing Normal University
Research Group
Coastal Engineering (CEG) (TU Delft)
Copyright: © 2020 Weilun Gao, Dongxue Li, Zhengbing Wang, William Nardin, Dongdong Shao, Tao Sun, Beijing University, Baoshan Cui
DOI: https://doi.org/10.1029/2020GL090450
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Coastal Engineering

Abstract

River longitudinal profile, a key morphological characteristic of the river channel, is subject to river mouth progradation. Given the increasing influence of human activities and climate change on this critical downstream control, understanding its effects on the evolution of the longitudinal profile is imperative. A general theoretical framework is proposed to quantify the relevant effects, which is tested by numerical experiment and compared with field, numerical and laboratory data from the literature. The results suggest the existence of a critical ratio of accommodation space to sediment supply of approximately 0.5, above which the typical concave upward profile tends to form. Further analyses show that sea level rise tends to increase the concavity of the longitudinal profile of a river with a relatively low equilibrium bed slope and progradation rate.

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