Articles | Volume 23, issue 10
Research article
25 Oct 2019
Research article |  | 25 Oct 2019

Analytical model captures intratidal variation in salinity in a convergent, well-mixed estuary

Yanwen Xu, Antonius J. F. Hoitink, Jinhai Zheng, Karl Kästner, and Wei Zhang

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Cited articles

Brockway, R., Bowers, D., Hoguane, A., Dove, V., and Vassele, V.: A note on salt intrusion in funnel–shaped estuaries: Application to the Incomati estuary, Mozambique, Estuar. Coastal Shelf S., 66, 1–5,, 2006. 
Buschman, F. A., Hoitink, A. J. F., Van Der Vegt, M., and Hoekstra, P.: Subtidal flow division at a shallow tidal junction, Water Resour. Res., 46, W12515,, 2010. 
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,, 2012. 
Cameron, W. M. and Pritchard, D. W.: Estuaries, in: The Sea Vol. 2, edited by: Hill, M. N., John Wiley and Sons, New York, USA, 306–324, 1963. 
Eaton, T. T.: Analytical estimates of hydraulic parameters for an urbanized estuary – Flushing Bay, J. Hydrol., 347, 188–196,, 2007. 
Short summary
A new, unsteady analytical solution is presented to simulate the spatio-temporal variation in salinity in convergent, well-mixed estuaries. A first application in the Pearl River estuary shows it to be an efficient approach for predicting salt intrusion dynamics with satisfying accuracy. The model can be used to decide on water-fetching methods related to drinking-water supply. The model explains and quantifies the time difference between salinity at high water slack and the maximum salinity.