Abstract
In this study, bathymetric data is obtained frequently from operational record (the position by GPS and the depth by fishfinder) of small fishing boats in the nearshore area. Medium-term trends of ebb-tidal delta (ETD) progradation and short-term topographical changes on ETD are detected in comparison of frequent bathymetric data from 2007 to 2012. Analysis of ETD terminal slope (depth of 9-11 m) resulted in 7-9 m/year of annual rate of prograding seaward until June 2011. Bathymetric change analysis shows that concentrated erosion (approximately 2 m vertically) occurred within ETD by effect of high wave condition due to T1106 in July 2011. Longshore sediment transport is estimated from volumetric change of erosion zone on ETD.
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Schedule a callMore From: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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