Density fronts: sieves in the estuarine sediment transfer system?

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    Abstract

    Sharply defined water density gradients (due principally to salinity contrasts but also to temperature effects) and velocity gradients occur both longitudinally and transversely in many estuaries. These gradients are related to frontal systems (fronts) which, at the water surface, are typically manifest as lines or bands of foam, floating debris or distinct changes in the colour and transparency of the water. Fronts, which form by several mechanisms, including tidal intrusion, axial convergence, advective flow and flow separation, act as temporary barriers, serve to inhibit exchange of water masses and to entrap fine particulate materials. It is suggested that, in terms of suspended sediment transport through and within estuaries that are characterised by fronts, such features should be considered as "sieves" in the estuarine sediment transfer system. Where characterised by many fronts, an estuary as a whole should most appropriately be considered as a complex of sieves, which collectively create a dynamic "sieve regime". © 2000 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)89-92
    Number of pages4
    JournalPhysics and Chemistry of the Earth, Part B: Hydrology Oceans and Atmosphere
    Volume26
    Issue number1
    DOIs
    Publication statusPublished - 2001

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    estuarine sediment
    estuary
    foam
    temperature effect
    transparency
    suspended sediment
    water mass
    sediment transport
    surface water
    salinity
    water

    Cite this

    @article{31d1fb9a504a43e8826439433ab843d8,
    title = "Density fronts: sieves in the estuarine sediment transfer system?",
    abstract = "Sharply defined water density gradients (due principally to salinity contrasts but also to temperature effects) and velocity gradients occur both longitudinally and transversely in many estuaries. These gradients are related to frontal systems (fronts) which, at the water surface, are typically manifest as lines or bands of foam, floating debris or distinct changes in the colour and transparency of the water. Fronts, which form by several mechanisms, including tidal intrusion, axial convergence, advective flow and flow separation, act as temporary barriers, serve to inhibit exchange of water masses and to entrap fine particulate materials. It is suggested that, in terms of suspended sediment transport through and within estuaries that are characterised by fronts, such features should be considered as {"}sieves{"} in the estuarine sediment transfer system. Where characterised by many fronts, an estuary as a whole should most appropriately be considered as a complex of sieves, which collectively create a dynamic {"}sieve regime{"}. {\circledC} 2000 Elsevier Science Ltd. All rights reserved.",
    author = "Reeves, {A. D.} and R.W. Duck",
    year = "2001",
    doi = "10.1016/S1464-1909(01)85020-6",
    language = "English",
    volume = "26",
    pages = "89--92",
    journal = "Physics and Chemistry of the Earth, Part B: Hydrology Oceans and Atmosphere",
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    }

    TY - JOUR

    T1 - Density fronts

    T2 - sieves in the estuarine sediment transfer system?

    AU - Reeves, A. D.

    AU - Duck, R.W.

    PY - 2001

    Y1 - 2001

    N2 - Sharply defined water density gradients (due principally to salinity contrasts but also to temperature effects) and velocity gradients occur both longitudinally and transversely in many estuaries. These gradients are related to frontal systems (fronts) which, at the water surface, are typically manifest as lines or bands of foam, floating debris or distinct changes in the colour and transparency of the water. Fronts, which form by several mechanisms, including tidal intrusion, axial convergence, advective flow and flow separation, act as temporary barriers, serve to inhibit exchange of water masses and to entrap fine particulate materials. It is suggested that, in terms of suspended sediment transport through and within estuaries that are characterised by fronts, such features should be considered as "sieves" in the estuarine sediment transfer system. Where characterised by many fronts, an estuary as a whole should most appropriately be considered as a complex of sieves, which collectively create a dynamic "sieve regime". © 2000 Elsevier Science Ltd. All rights reserved.

    AB - Sharply defined water density gradients (due principally to salinity contrasts but also to temperature effects) and velocity gradients occur both longitudinally and transversely in many estuaries. These gradients are related to frontal systems (fronts) which, at the water surface, are typically manifest as lines or bands of foam, floating debris or distinct changes in the colour and transparency of the water. Fronts, which form by several mechanisms, including tidal intrusion, axial convergence, advective flow and flow separation, act as temporary barriers, serve to inhibit exchange of water masses and to entrap fine particulate materials. It is suggested that, in terms of suspended sediment transport through and within estuaries that are characterised by fronts, such features should be considered as "sieves" in the estuarine sediment transfer system. Where characterised by many fronts, an estuary as a whole should most appropriately be considered as a complex of sieves, which collectively create a dynamic "sieve regime". © 2000 Elsevier Science Ltd. All rights reserved.

    U2 - 10.1016/S1464-1909(01)85020-6

    DO - 10.1016/S1464-1909(01)85020-6

    M3 - Article

    VL - 26

    SP - 89

    EP - 92

    JO - Physics and Chemistry of the Earth, Part B: Hydrology Oceans and Atmosphere

    JF - Physics and Chemistry of the Earth, Part B: Hydrology Oceans and Atmosphere

    SN - 1464-1909

    IS - 1

    ER -