cven489 special topics in mixing and transport in the environment description of course introduction...
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CVEN489 Special Topics inCVEN489 Special Topics inMixing and Transport in the Mixing and Transport in the
EnvironmentEnvironment
Description of course
Introduction to flow and mass transport in environmental flows. Topics include molecular and turbulent diffusion; river, lake and estuary mixing; dissolution boundary layers; atmospheric transport; and, an introduction to environmental quality computer modeling.
Spring 2004. 3 Credit Hours
Team taught by Drs. Scott Socolofsky and Kuang-An Chang
a sewage outfall plume in coastal waters a sewage outfall plume in coastal waters
The plume is intruding into a narrow layer. At the time the picture was taken, the mean current field was moving the plume off-shore.
tracer-study plume conducted at the mouth of a tracer-study plume conducted at the mouth of a river entering into an estuary river entering into an estuary
One can clearly see the fine-scale structure of the plume interacting with ambient turbulence and the slow nature of lateral spreading.
tracer study is conducted in a river tracer study is conducted in a river
flow direction
Although vertical mixing of the tracer is achieved very quickly (rule of thumb is 10 river depths downstream), complete lateral mixing takes much longer.
tracer study is conducted in a river (continued) tracer study is conducted in a river (continued)
The curve in the river strongly enhances the lateral mixing of the plume.
waste outfall from a chemical plant waste outfall from a chemical plant
The photograph clearly shows the slow lateral growth of the plume. Such strong plumes that are clearly visible are no longer allowed due to today's stricter discharge regulations.
joining of three different rivers joining of three different rivers
The one on the left, with very high particulate concentration, joins with the two rivers on the right. The larger of the two rivers carries a higher particulate load, thus the darkest (cleanest) smallest river is also visible. Notice how sharp the boundaries are separating the various river flows.