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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 9 | Copyright
Hydrol. Earth Syst. Sci., 16, 3327-3339, 2012
https://doi.org/10.5194/hess-16-3327-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 18 Sep 2012

Research article | 18 Sep 2012

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

E. F. Zhang1, H. H. G. Savenije2, S. L. Chen1, and X. H. Mao3 E. F. Zhang et al.
  • 1State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China
  • 2Department of Water Management, Delft University of Technology, Delft, The Netherlands
  • 3Shanghai Hydrological Administration, Shanghai, China

Abstract. 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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