Velocity and Sediment Concentration Measurements over Bedforms in Sand-Bed Rivers

摘要

Bedforms often are present on the bed of alluvial sand-bed rivers. Bedforms, such asrndunes, impact the flow field. In this field study, velocity and suspended-sedimentrnconcentration measurements were made longitudinally along a dune field in large (5-15rnmeters deep) alluvial sand-bed rivers. The velocity and suspended-sedimentrnconcentration data was collected using an acoustic Doppler current profiler, acousticrnDoppler velocimeters, an optical backscatter sensor, and two sediment intakes. Thisrnpaper presents a description of these measurement devices and techniques for therncollection of this data. Some preliminary results observed at the Missouri River at St.rnCharles, Missouri are presented.