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Bed Form Development and Distribution Pattern, Parker and Essex Estuaries, Massachusetts

J. C. BoothroydDennis K. Hubbard

出版	U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 1974
URL	http://books.google.com.hk/books?id=VSYaAQAAIAAJ&hl=&source=gbs_api

註釋

Velocity, depth, temperature, grain size, and bed form scale and orientation were measured for complete tidal cycles at 50 stations in two New England estuaries. Scuba observation of bed form change and migration, fathometer profiles, and 700 bed form scale and orientation readings were also carried out. This investigation led to the recognition of a sequence of bed forms based on increasing 'flow strength'. Bed form type is governed by maximum flood and ebb velocities attained at a given locality. Velocity asymmetry and duration are important in determining bed form morphology and amount of crossbedding bimodality. Froude number shows good correlation with bed form type only in depths less than 2 meters. (Modified author abstract).