| Abstrakt: |
The variabilities of multiple bar system have been investigated in inter-annual time scale based on long-term field surveys. The field sites include Ishikawa Coast and Chirihama Coast facing the Sea of Japan. On both sites, large scale sandbar system has developed and the morphological variabilities are characterized by cyclic and systematic migration of multiple bars. On Ishikawa Coast, representative spatial patterns during individual cycle are analyzed to describe the three-dimensional morphological evolutions. Considerable changes in plan shape are observed such as quasi-regular crescentic patterns, parallel alignment of oblique bars, disconnection and realignment of bars. In contrast, bar migration on Chirihama Coast is quasi two-dimensional. The transition of the multiple sandbar systems is well reproduced by an empirical parametric model. [ABSTRACT FROM AUTHOR] |
