Temporal and Spatial Changes in Grain Size on a Macro-Tidal Channel-Flat Complex: Results from Kingsport, Nova Scotia, Bay of Fundy.

Brent A Law1, Timothy G Milligan1, Paul S Hill2, Jessica C. Garwood2 and Vanessa A Zions1, (1)Fisheries and Oceans Canada, Dartmouth, NS, Canada, (2)Dalhousie University, Halifax, NS, Canada
Abstract:
In April 2012, a study was initiated to examine the seasonal change in grain size on a muddy macro-tidal flat and channel complex in Kingsport, N.S. Surficial sediment samples were collected for disaggregated inorganic grain size (DIGS) analysis every month for 1 year from a tidal flat and from a tidal channel and its banks. The monthly sampling was completed in March 2013. Sediment grain size on the tidal flat correlates with distance to the nearest channel, and flocculation plays a major role in sediment deposition. These results differ from those from Willapa Bay, Washington, USA, which a meso-tidal channel-flat complex that showed no relationship between sediment grain size, floc fraction and distance to the nearest channel. Findings from this study are discussed in terms of the ability of ecosystems to maintain a stable state and with regards to the development of tidal power in the Minas Passage.
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