Mid-Scale Laboratory Tests on a Two-Dimensional Movable-Bed Sand Model

by J. E. Fowler, Coastal Engineering Research Cent, United States,
S. A. Hughes, Coastal Engineering Research Cent, United States,



Document Type: Proceeding Paper

Part of: Sediment Transport Modeling

Abstract: A two-dimensional physical model was used to simulate wave-induced scour in front of a concrete dike sloped at 1:4. The tests were conducted at the U.S. Army Engineers Waterways Experiment Station during October - December, 1988. The primary purpose of the tests was to validate a proposed scaling relationship for movable-bed models by reproducing profile evolution observed in a large wave flume at the University of Hannover in the Federal Republic of Germany in 1985. The model was undistorted and was constructed at a 1:7.5 geometric scale as determined by the fall velocity parameter H/WT. Quartz sand with mean diameter 0.13 mm was used in the model to simulate prototype sand which had 0.33 mm mean diameter. Results indicated that scaling with the fall velocity parameter generates favorable profile replication for energetic processes such as scour or beach erosion.

Subject Headings: Two-dimensional models | Model tests | Scale models | Scour | Movable bed models | Sandy soils | Physical models | Simulation models

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