Articles | Volume 23, issue 6
https://doi.org/10.5194/hess-23-2779-2019
https://doi.org/10.5194/hess-23-2779-2019
Research article
 | 
01 Jul 2019
Research article |  | 01 Jul 2019

Seasonal behaviour of tidal damping and residual water level slope in the Yangtze River estuary: identifying the critical position and river discharge for maximum tidal damping

Huayang Cai, Hubert H. G. Savenije, Erwan Garel, Xianyi Zhang, Leicheng Guo, Min Zhang, Feng Liu, and Qingshu Yang

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Cited articles

Alebregtse, N. C. and de Swart, H. E.: Effect of river discharge and geometry on tides and net water transport in an estuarine network, an idealized model applied to the Yangtze Estuary, Cont. Shelf. Res., 123, 29–49, https://doi.org/10.1016/j.csr.2016.003.028, 2016. a, b, c, d, e
Buschman, F. A., Hoitink, A. J. F., van der Vegt, M., and Hoekstra, P.: Subtidal water level variation controlled by river flow and tides, Water Resour. Res., 45, W10420, https://doi.org/10.1029/2009WR008167, 2009. a, b, c
Cai, H., Savenije, H. H. G., and Toffolon, M.: A new analytical framework for assessing the effect of sea-level rise and dredging on tidal damping in estuaries, J. Geophys. Res., 117, C09023, https://doi.org/10.1029/2012JC008000, 2012a. a
Cai, H., Savenije, H. H. G., Yang, Q., Ou, S., and Lei, Y.: Influence of river discharge and dredging on tidal wave propagation: Modaomen Estuary case, J. Hydraul. Eng., 138, 885–896, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000594, 2012b. a, b
Cai, H., Savenije, H. H. G., and Jiang, C.: Analytical approach for predicting fresh water discharge in an estuary based on tidal water level observations, Hydrol. Earth Syst. Sci., 18, 4153–4168, https://doi.org/10.5194/hess-18-4153-2014, 2014a. a, b, c, d
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Short summary
Tide–river dynamics play an essential role in large-scale river deltas as they exert a tremendous impact on delta morphodynamics, salt intrusion and deltaic ecosystems. For the first time, we illustrate that there is a critical river discharge, beyond which tidal damping is reduced with increasing river discharge, and we explore the underlying mechanism using an analytical model. The results are useful for guiding sustainable water management and sediment transport in tidal rivers.