Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alongshore Uniform and Nonuniform Bar Crest Change
Alongshore uniform (2-D) and nonuniform (3-D) nearshore bar crest morphology was quantified for a 3.4 year data set of videoed alongshore bar crest lines collected at the double barred beach of Noordwijk, Netherlands. Typical spatial and temporal scales of bar crest change were derived from this description. Cross-shore bar migration (2-D change) was characterised by a dominant yearly offshore trend with superimposed monthly (seasonal) and weekly variations. In contrast, 3-D changes mainly varied on weekly to monthly scales. Observed 3-D features, like crescentic bars and rips, had typical life-times of several months, and migrated alongshore or changed in cross-shore amplitude over weeks to months. Total bar change was thus dominated by 3-D change on weekly to monthly scales and by 2-D change on yearly scales, meaning that the common assumption of 2-D bar change dominating over 3-D bar change is only valid on restricted time scales.
Alongshore Uniform and Nonuniform Bar Crest Change
Alongshore uniform (2-D) and nonuniform (3-D) nearshore bar crest morphology was quantified for a 3.4 year data set of videoed alongshore bar crest lines collected at the double barred beach of Noordwijk, Netherlands. Typical spatial and temporal scales of bar crest change were derived from this description. Cross-shore bar migration (2-D change) was characterised by a dominant yearly offshore trend with superimposed monthly (seasonal) and weekly variations. In contrast, 3-D changes mainly varied on weekly to monthly scales. Observed 3-D features, like crescentic bars and rips, had typical life-times of several months, and migrated alongshore or changed in cross-shore amplitude over weeks to months. Total bar change was thus dominated by 3-D change on weekly to monthly scales and by 2-D change on yearly scales, meaning that the common assumption of 2-D bar change dominating over 3-D bar change is only valid on restricted time scales.
Alongshore Uniform and Nonuniform Bar Crest Change
van Enckevort, I. M. J. (Autor:in) / Ruessink, B. G. (Autor:in)
Fourth Conference on Coastal Dynamics ; 2001 ; Lund, Sweden
Coastal Dynamics '01 ; 656-665
18.05.2001
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Alongshore Uniform and Nonuniform Bar Crest Change
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