Evaluation of Sand as a Modeling Material Using Vellinga's Guidanceby Jimmy E. Fowler, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,
Ernest R. Smith, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,
Abstract: An experimental series of flume tests were conducted using three sizes of sand as modeling sediment in order to evaluate the effect of sediment grain size and the range of validity of Vellinga's scaling guidance. The sediments used in the present study were quartz sands with mean diameters of 0. 46 mm, 0. 23 mm, and 0. 13 mm. Initial slopes as determined by Vellinga's guidance were subjected to monochromatic waves to simulate erosive and accretive events. Tests indicated that best results are obtained with fine sand and initial slopes such that model distortion is small. This is true because initial slope steepness has considerable effect on breaking wave form and therefore profile development and must be considered when modeling prototype sand beaches. Froude scaling was utilized to model time elapsed and model period.
Subject Headings: Model tests | Hydraulic models | Sandy soils | Sediment | Fouling | Slopes | Breaking waves | Sand (hydraulic)
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