The conditions for tidal bore formation and its effect on the transport of saline water at river mouths

Dolgopolova, E. N.

doi:10.1134/s0097807813010028

Cited by 17 publications

(7 citation statements)

References 28 publications

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“…Pattern formation is one of the fascinating characteristics of nature. 1 Specifically, liquid flow-driven patterns are observed at different length scales, varying from a few meters as in lava flow, 2 tidal bore, 3 etc., to a few tens of micrometers in the case of capillary waves. 4 Often the principles of fluid mechanics and thermodynamics are sufficient to understand the patterns created by nature; however, translation of the same principles at the lab as well as industrial scale to create patterns of practical importance remains challenging and an exciting endeavor.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Formation of Structures with Micro- and Nano-Scopic Periodic Ripple Patterns

et al. 2022

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We report the first study on the formation of structures with micro- and nano-scopic periodic surface patterns created by the spontaneous flow of liquid metal over thin metallic solid films. Minute details of the flow of liquid gallium over gold are captured in situ at very high magnifications using a scanning electron microscope, and a series of experiments and microstructural characterization are performed to understand the underlying principles of the liquid flow and the pattern formation. This phenomenon is solely driven by wetting, with little influence of gravity, and is aided by a tenacious semi-solidus envelope of the intermetallic compound formed due to the reaction between the liquid metal and the metallic substrate. This complex flow creates highly periodic patterns with features ranging from hundreds of nanometers to tens of micrometers, which can be tuned a priori . We propose a model capturing the essential mechanics of the ripple formation and apply it to simulate the formation of a single ripple, along with its essential asymmetry, that forms the basis for generating the observed patterns.

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Section: Introductionmentioning

confidence: 99%

Spontaneous Formation of Structures with Micro- and Nano-Scopic Periodic Ripple Patterns

et al. 2022

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“…f Canestrelli et al (2010) and Canestrelli et al (2014). g Dolgopolova (2013). h Bonneton et al (2015).…”

Section: Application Of the Present Criterion To Real Estuariesmentioning

confidence: 99%

“…It is worth pointing out that, for some of the listed estuaries, more than one value of the bore front height is reported in the literature. For the Qiantang estuary, ΔY = 1 − 3 m is given in Bartsch-Winkler and Lynch (1988) and ΔY = 4 m is reported in Water Resources Research 10.1029/2018WR022937 Dolgopolova (2013), we use the value ΔY = 3 m that is in between the two; for the Hoogly estuary, ΔY = 2 m is given in Bartsch-Winkler and Lynch (1988), whereas Dolgopolova (2013) gives the range ΔY = 1 − 3 m and Shri and Chugh (1961) give the value ΔY = 1.5, the latter is the value used in the present analysis.…”

Section: Application Of the Present Criterion To Real Estuariesmentioning

confidence: 99%

“…However, in addition to being rather qualitative, field observations do not always support this criterion. Tidal bores are observed, for example, in the Indus River (Bartsch‐Winkler & Lynch, ) with a spring tidal range of just approximately 2.0 m (Eisma et al, ), whereas in the Mezen River, no bore is observed despite the large tidal range of 7.8 m (Dolgopolova, ).…”

Section: Introductionmentioning

confidence: 99%

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Consideration of the Mechanisms for Tidal Bore Formation in an Idealized Planform Geometry

Viero

Defina

2018

Water Resources Research

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A tidal bore is a positive wave traveling upstream along the estuary of a river, generated by a relatively rapid rise of the tide, often enhanced by the funneling shape of the estuary. The swell produced by the tide grows and its front steepens as the flooding tide advances inland, promoting the formation of a sharp front wave, that is, the tidal bore. Because of the many mechanisms and conditions involved in the process, it is difficult to formulate an effective criterion to predict the bore formation. In this preliminary analysis, aimed at bringing out the main processes and parameters that control tidal bore formation, the degrees of freedom of the problem are largely reduced by considering a rectangular channel of constant width with uniform flow, forced downstream by rising the water level at a constant rate. The framework used in this study is extremely simple, yet the problem is still complex, and the solution is far from being trivial. From the results of numerical simulations, three distinctive behaviors emerged related to conditions in which a tidal bore forms, a tidal bore does not form, and a weak bore forms; the latter has a weakly steep front and after the bore formed it rapidly vanishes. Based on these behaviors, some criteria to predict the bore formation are proposed and discussed. The more effective criterion, suitably rearranged, is checked against data from real estuaries, and the predictions are found to compare favorably with the available data.

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“…A tidal bore constitutes hydrodynamic discontinuity in terms of the pressure and velocity fields. Two types of tidal bores may be observed in nature, undular bores and breaking bores, based on their free-surface shapes (Chanson, 2010;Dolgopolova, 2013;Li et al, 2017). The former is characterised by a train of secondary waves following the non-breaking surge front (Peregrine, 1966).…”

Section: Introductionmentioning

confidence: 99%

Real-time characteristics of tidal bore propagation in the Qiantang River Estuary, China, recorded by marine radar

Pan

Chanson

et al. 2019

Continental Shelf Research

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Quantitative real-time observations of a tidal bore in a macro-tidal estuary are difficult and dangerous, particularly in large estuaries. Mathematical and numerical models have been used to predict tidal bore advances; however, to date, there have been no validations of large-scale flow patterns. A marine radar can provide valuable real-time information on tidal bore propagation. In this paper, a template matching method using a cross-correlation algorithm was explored to estimate the evolution and celerity of a tidal bore with medium resolution marine radar images. The Qiantang River tidal bore was recorded at two different geographical locations. Characteristic flow patterns were derived and analysed, including temporal changes over a relatively large-scale area. The

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The conditions for tidal bore formation and its effect on the transport of saline water at river mouths

Cited by 17 publications

References 28 publications

Spontaneous Formation of Structures with Micro- and Nano-Scopic Periodic Ripple Patterns

Spontaneous Formation of Structures with Micro- and Nano-Scopic Periodic Ripple Patterns

Consideration of the Mechanisms for Tidal Bore Formation in an Idealized Planform Geometry

Real-time characteristics of tidal bore propagation in the Qiantang River Estuary, China, recorded by marine radar

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