Quantifying natural sediment erodibility using a mobile oscillatory flow channel
نویسندگان
چکیده
Erosion of tidal flats is to a large degree determined by the erosion threshold their cohesive sediments, i.e., critical bottom shear stress identifying onset erosion. Given that erodibility can vary strongly over both space and time, rapid in situ measuring methods for quantifying are needed. As largest changes flat elevation generally observed during storms when wave dominated, we developed mobile Oscillatory-Channel Resuspension flume, OsCaR, as method measure wave-generated on sediment cores directly taken from field. We assessed performance OsCaR-flume conducting measurements range artificial sand – mud mixtures, along natural longshore estuarine type benthic assemblage gradient. Measured sediments matched well with transport theory, indicating able reproduce accurately. Moreover, patterns influence total metabolic rate divided functional groups show capture main processes, they corresponded previous laboratory based studies. • A new under waves introduced. Sediment resuspension rates be used quantify bed stress. Benthic may explain field context.
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ژورنال
عنوان ژورنال: Estuarine Coastal and Shelf Science
سال: 2021
ISSN: ['1096-0015', '0272-7714']
DOI: https://doi.org/10.1016/j.ecss.2021.107574