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Yu et al_J Flood Risk Management - 2022.pdf (21.35 MB)

Simulation of Poyang Lake water levels and outflow under historical extreme hydrological scenarios

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posted on 2022-10-19, 14:27 authored by Meixiu Yu, Xiaolong Liu, Paul WoodPaul Wood, Li Wei, Guoqing Wang, Jianyun Zhang, Qiongfang Li

Due to an intensification of anthropogenic activities and climate change in recent decades, the hydrological connections and relationships between rivers and lakes have been significantly modified globally. Poyang Lake is one of the largest freshwater lakes globally and is one of the few that remain naturally connected to the Yangtze River. To investigate the full hydrological conditions (extreme high and low discharge) of Poyang Lake outflow under current bathymetric conditions, a large-scale 1D- and 2D-coupled high-resolution hydrodynamic model of the Poyang Lake basin–Yangtze River system was developed. We simulated the outflow and water levels of Poyang Lake under nine different extreme hydrological scenarios with high precision and computational efficiency. We propose (1) a novel partition calibration method to characterize the roughness coefficient of large water bodies in complicated geographical terrain both for wet and dry seasons; (2) a new method for setting initial conditions for hydrodynamic simulation of large water bodies subject to strong hydrological regulation. Results indicated that (1) maximum outflow and water levels will reach 37,200 m3/s and 22.28 m when Poyang Lake basin floodwater coincides with flooding on the Yangtze River; (2) precipitation over the lake has increased outflow but this has had very limited influence on its changing hydrological pattern; (3) the effect of hydrological conditions within the system differs for both the lake outflow and water level. The research provides important reference conditions for the application of the InfoWorks ICM model in future applications and studies of large river–lake systems.

Funding

Study on the Influence Mechanism of Urban Effective Impervious Area Spatial Layout on Rainfall-Runoff Process

National Natural Science Foundation of China

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Fundamental Research Funds for the Central Universities (B200202033)

National Key Research and Development Programs of China (2016YFA0601501)

History

School

  • Social Sciences and Humanities

Department

  • Geography and Environment

Published in

Journal of Flood Risk Management

Volume

15

Issue

3

Publisher

Chartered Institution of Water and Environmental Management and John Wiley & Sons Ltd.

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access article published by Wiley under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. See more here https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2022-03-23

Publication date

2022-04-13

Copyright date

2022

eISSN

1753-318X

Language

  • en

Depositor

Prof Paul Wood. Deposit date: 17 October 2022

Article number

e12806

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