. Development of a portable sand trap for use in the nearshore. Littoral drift; Oceanographic instruments; Sedimentation and deposition. EXPANDING HOOD. HOOD. LENGTH Figure 13. Nozzle parameters varied in hydraulic test (after Rosati and Kraus 1988) By means of either the nozzle design or by bending the bars used to mount the nozzle to the rack, the entrance to each nozzle was positioned upstream from the rack to minimize flow disturbance caused by the mounts and rack. A prototype streamer trap rack as used in the field was employed to position nozzles at a particular elevation for hydraulic t


. Development of a portable sand trap for use in the nearshore. Littoral drift; Oceanographic instruments; Sedimentation and deposition. EXPANDING HOOD. HOOD. LENGTH Figure 13. Nozzle parameters varied in hydraulic test (after Rosati and Kraus 1988) By means of either the nozzle design or by bending the bars used to mount the nozzle to the rack, the entrance to each nozzle was positioned upstream from the rack to minimize flow disturbance caused by the mounts and rack. A prototype streamer trap rack as used in the field was employed to position nozzles at a particular elevation for hydraulic testing; the rack legs were removed because they served no purpose on the metal floor of the tank. Tape was used to attach nozzles to the rack. Test Conditions Definition of terms 37. Hydraulic efficiency Ej, is defined as the ratio of the average flow speed directly in front of the sampler nozzle Vt (units of distance per time) to the average speed for the same ambient flow condition at the same 27. 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 Rosati, Julie Dean; Kraus, Nicholas C; 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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