. DUCK85 surf zone sand transport experiment. Banks (Oceanography); Sedimentation and deposition; Littoral drift. Figure 6. Streamer traps used at DUCK85 types of racks (Kraus 1987), and optimization of the trap nozzle geometry (Rosati and Kraus 1988, Rosati and Kraus in preparation). Streamer nozzles were mounted vertically on stainless steel racks and pointed into the direc- tion of flow so that they were located forward of the racks and any scour clouds produced by the rack and trap operator. Visual observation during operation indicated that scoured sand at the rack did not move upstream a
. DUCK85 surf zone sand transport experiment. Banks (Oceanography); Sedimentation and deposition; Littoral drift. Figure 6. Streamer traps used at DUCK85 types of racks (Kraus 1987), and optimization of the trap nozzle geometry (Rosati and Kraus 1988, Rosati and Kraus in preparation). Streamer nozzles were mounted vertically on stainless steel racks and pointed into the direc- tion of flow so that they were located forward of the racks and any scour clouds produced by the rack and trap operator. Visual observation during operation indicated that scoured sand at the rack did not move upstream and into the streamers. Data collection was always performed in a unidirectional current so that the streamer never reversed direction, a situation which might cause collected sand to be lost. 22. The nozzles on the traps used at DUCK85 were made of 1/4-ln. stain- less steel bar and had a width of 15 cm and height of 9 cm (Figure 7). Nozzles were attached to the trap racks by mounting bars and secured in place by plates with wing nuts. Figure 8 gives a schematic of the complete trap, with only one streamer shown for clarity. Typically, five streamers were mounted on the racks. 18. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kraus, Nicholas C; Gingerich, Kathryn J; Rosati, Julie Dean; U. S. Army Engineer Waterways Experiment Station; Coastal Engineering Research Center (U. S. ); United States. Army. Corps of Engineers. Vicksburg, Miss. : U. S. Army Engineer Waterways Experiment Station ; Springfield, Va. : available from National Technical Information Service
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