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  4. Morphodynamics of single-barred embayed beaches : Shoreline and barline morphodynamics at the scale of the embayment
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00105540-19

Morphodynamics of single-barred embayed beaches : Shoreline and barline morphodynamics at the scale of the embayment

Veröffentlichungsdatum
2016-06-01
Autoren
Blossier, Brice  
Betreuer
Winter, Christian  
Gutachter
Bryan, Karin  
Zusammenfassung
Seven years of shore and sandbar positions extracted from hourly time-averaged images collected at Tairua Beach (New Zealand) are used to study the morphodynamics of the shoreline and the nearshore parallel sandbar of single-barred embayed beaches. First, a semi-empirical model is proposed, that validates the concept of sandbar rotation and relates it to the wave energy gradient along the embayment. Then, a statistical study confirms the role of the alongshore wave energy flux in the rotation of embayed beach shorelines. Finally, principal component analyses and semi-empirical models are used together to characterize the dominant dynamic patterns of the shoreline and sandbar at the scale of the embayment. Dominant, simultaneous cross-shore migrations relate to beach state transitions and to variations in beach planform curvature (breathing). Rotations are largely asynchronous, confirming that different drivers are likely to be involved in shoreline and sandbar rotations.
Schlagwörter
Coastal processes

; 

Numerical modeling

; 

Sediment transport

; 

Sandbar dynamics

; 

Embayed beaches

; 

Video imagery

; 

Principal component analysis
Institution
Universität Bremen  
Fachbereich
Fachbereich 05: Geowissenschaften (FB 05)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00105540-1.pdf

Size

28.22 MB

Format

Adobe PDF

Checksum

(MD5):206d61531f4684e287d2c9dd552d8449

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