Content summary 
Hydrology is the study of the water cycle. Natural and man-made processes guide water in its varied forms to a variety of ends. Use as irrigation, drinking water and process water by man is very common.
Learning Materials 
Hydrology Lessons 
For a source contaminant concentration entering a flow of velocity at a distance upstream from a point, the downstream concentration at that point is determined by the ratio...
Where... is the local dispersion coefficient determined by
and where friction velocity is
Velocity Distribution in an Open Channel (River) 
Velocity distribution within a river follows a standard velocity profile for a confined space (pipe-flow)with the exception that the vertical distribution is truncated at the surface due to reduced friction with atmospheric gases versus the high friction against riverbed materials.
Boundary Layer thickness, also known as the displacement thickness, is defined by:
where is the average velocity and is the velocity distribution in a channel of uniform depth .
So in the case of this river, where the current is always normal to the cross-sectional area of the river (idealized)...
Study guide: 
- Physical Properties of the Oceans
Additional helpful readings include:
- MIT OCW - Transport Processes in the Environment course
- MIT OCW - Groundwater Hydrology course
- MIT OCW - Chemicals in the Environment: Fate and Transport course
- MIT OCW - Water Resource Systems course
- MIT OCW - Aquatic Chemistry course
- MIT OCW - Water and Sanitation Infrastructure in Developing Countries course
- MIT OCW - Environmental Microbiology course
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