NDLI: Hydrodynamic effects at the entry of tidal waves into estuaries

Content Provider	Springer Nature Link
Author	Zyryav, V. N. Chebava, M. K.
Copyright Year	2016
Abstract	The phenomenon of an increase in tidal wave height in cone-shaped estuaries is studied. The effect of estuary narrowing in the direction of tidal wave propagation (the hydrodynamic effect of confusor) is among the factors amplifying the tide. An opposite effect of turbulent friction, whose manifestation increases with decreasing bay’s depth, conversely, reduces tide amplitude because of the dissipation of tidal wave energy. Stokes diffusion layer also plays a significant role in the formation of wave transformation regime. In an estuary with a median depth, which is much greater than the Stokes layer thickness, the confusor effect is stronger and tide amplitude increases at estuary head. At depths lesser than Stokes layer thickness, the turbulent friction dominates over the confusor effect and the amplitude of tidal wave decreases at the head of the estuary. The depths of the order of Stokes layer thickness cause an interesting intermediate phenomenon—at the entrance into the estuary, first the effect of friction manifests itself, resulting in a decrease in the amplitude of tidal wave, but later, the effect of confusor starts dominating, and the amplitude of tidal wave again increases toward estuary head. When the period of tidal wave coincides with seiche period, a resonance enhancement of seiche oscillations takes place in the estuary.
Starting Page	621
Ending Page	628
Page Count	8
File Format	PDF
ISSN	00978078
Journal	Water Resources
Volume Number	43
Issue Number	4
e-ISSN	1608344X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-07-27
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	estuary tidal wave evolution confusor effect turbulent friction effect Stokes layer seiches resonance enhancement Hydrogeology Hydrology/Water Resources Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology

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