MULTI-INLET MIGRATION MODELING FOR NAVIGATION CHANNEL MANAGEMENT IN TABUSINTAC BAY, EASTERN CANADA

Proceedings of the International Conference on Coastal Engineering

Vincent Leys¹  Moritz Lehmann² 

[1] CBCL Limited Consulting Engineers;University of Waikato, Hillcrest, Hamilton 3216, New Zealand

关键词: dredging;    tidal inlets;    morphological modeling;   

DOI  :  10.9753/icce.v35.sediment.24

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

In New Brunswick, Atlantic Canada, Tabusintac Bay’s multiple tidal inlets meander through narrow barrier islands and are prone to large storm-induced shifts, making navigation hazardous. A multi-evidence assessment comprised of air-photo analysis, field observations and modeling was undertaken to understand the system and recommend sustainable dredging strategies and/or engineering alternatives. The modeling relied on a combination of simple analytical methods for tidal inlet stability, and complex morphological modeling to project the evolution of the nearshore bathymetry. The study recommended reassigning dredging efforts to a new inlet projected to grow and have better stability. Observations two years after the initial modeling effort indicate that the morphological evolution is consistent with the simulation results, and allowed lowered maintenance dredging requirements. This study illustrates how such a multi-evidence assessment of complex coastal dynamics can concretely guide efforts to reduce maintenance dredging and improve safety at sea.

【 授权许可】

CC BY