Date of Award
Bachelor of Science (BS)
Dr. Frank R. Karner
Data concerning flow conditions over known bedforms in the Little Missouri River were used to seek relationships between the two. The flow parameters that were measured included: current velocity, depth, water temperature, and suspended-load concentration. A bedload sample was also taken at each bedform. The median grain size of the sand fraction of the bedload sample was measured with a recording settling tube. Three relationships (velocity: depth, Reynolds number: Froude number, Reynolds number: median grain size of sand) were moderately successful in separating ripples from dunes but failed to isolate plane bed. The use of velocity near the bed to calculate the Froude number results in a relatively small Froude number. The choice of formulas to calculate the Froude number also has a large effect on its size.
In future studies the slope of the water surface should be measured and viscosity should be determined with a viscosimeter.
Halle, Richard, "Bedform and Flow Relationships, Little Missouri River Near Medora, North Dakota" (1972). Undergraduate Theses and Senior Projects. 64.