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An analytical solution for tidal propagation in the Yangtze Estuary, China

Author: Zhang, E.F. · Savenije, H.H.G. · Chen, S.L. · Mao, X.H.
Faculty:Civil Engineering and Geosciences
Department:Water Management
Type:Article/Letter to the Editor
Publisher: European Geosciences Union (EGU)
Source:Hydrology and Earth System Sciences, 16 (9), 2012
Identifier: doi:10.5194/hess-16-3327-2012
ISSN: 1027-5606
Keywords: OA-Fund TU Delft
Rights: © 2012 The Author(s) · This work is distributed under the Creative Commons Attribution 3.0 License


An analytical model for tidal dynamics has been applied to the Yangtze Estuary for the first time, to describe the tidal propagation in this large and typically branched estuary with three-order branches and four outlets to the sea. This study shows that the analytical model developed for a single-channel estuary can also accurately describe the tidal dynamics in a branched estuary, particularly in the downstream part. Within the same estuary system, the North Branch and the South Branches have a distinct tidal behaviour: the former being amplified demonstrating a marine character and the latter being damped with a riverine character. The satisfactory results for the South Channel and the South Branch using both separate and combined topographies confirm that the branched estuary system functions as an entity. To further test these results, it is suggested to collect more accurate and dense bathymetric and tidal information.

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