This course introduces students to aspects of fluid dynamics relevant to transport and deposition of particulate sedimentary materials. Emphasis is on the structure of turbulent shear flows and the forces exerted by fluid motions on bed of loosed sediment. With fluid dynamics as background, the course deals with sediment movement as bed load and suspended load, and with the geometry, kinematics, and dynamics of ripple and dune bed forms.
- This chapter examines some of the effects of steady rotation of the flow environment. The effects of rotation on the flow are striking, and I think not intuitive. These effects are of central importance in the study of what are called geophysical flows: the movements of the atmosphere and the oceans on scales of hundreds and thousands of kilometers.
- Research in the field of eolian sediment transport has fallen fairly naturally into three overlapping areas: soil erosion; transport of sand by saltation; and the nature and dynamics of eolian bed forms. This chapter deals with the second of those areas. Loess—deposits of windblown silt that is carried in suspension far from its source, for tens or even hundreds of kilometers.
- In this brief chapter we focus on the concept of the sediment transport rate more than on the procedures by which it might be predicted. it would take a lot of additional space in these course notes to do justice to the details of even the small number of sediment-discharge formulas that are in common use.