Full-scale tests of scAUR™ and VorGAUR™ products under 5 different configurations were conducted in a large flume, with no scour around the model, after full-scale model flow blockage effects were considered, which were comparable to results for the 1/7 size models in the AUR flume. This scAUR™ full-scale model was mounted around a full-scale t =1.5’ (0.457m) wide and 27.5 ‘ (8.38m) long pier model that has a circular nose and circular stern.
Two test gravel sediment sizes (specific gravity = 3) that were available in Iowa City, Iowa were used during each test. With only a trace amount below 1/8” (3.2mm), by weight about 63% of the smaller sediment gravel was between 1/8” (3.2mm) and ¼” (6.4mm) and 37% was between ¼” (6.4mm) and 3/8” (9.5mm). For this smaller gravel, the weighted average size is d50 = 0.23” (5.94mm) and a t/d50 = 77. The smaller gravel was located near the front on the left side of the model facing downstream. The larger test gravel, which filled most of the flume bed, was between 3/8” and 5/8”, which is t/d50 = 36.
Photo of the AUR full-scale scAUR™ with VorGAUR™ pier model in the University of Iowa Institute of Hydraulic Research (IIHR) Environmental Flume Facility (EFF).