Concentration, units & dimensions Learning Objectives: Define Environmental

Concentration, units & dimensions Learning Objectives:  Define Environmental

Concentration, units & dimensions Learning Objectives: Define Environmental Fluid Mechanics (EFM) List and define three types of concentration measures List the dimensions of concentration, mass fraction, and the diffusion coefficient Convert concentration measures among various units (i.e. mg/l to mol/l) Motivational Question: How do you quantify the amount of a

chemical dispersed in the environment? Examples of Environmental Fluid Mechanics Projects OCEN 489 and 689 Scott A. Socolofsky Environmental Fluid Mechanics Definition: Answers to how natural

processes in the hydrosphere change concentrations Transport processes: Diffusion (molecular and turbulent) Advection Transformation

processes: (key processes) Dissolution Chemical reactions Critter metabolisms Transport in the Hydrosphere

Courtesy of Chin Wu. Concentrations Concentration boundary layer. Turbulence structure is clearly evident.

Waves collage courtesy of John Crimaldi Hydromechanics Breaking waves Courtesy of Benoit Cushman-Roisin , Dartmouth College move sediment, generate sea spray,

oxygenate the water column and provide turbulence, among other important coastal and offshore processes Point Pollution Sources

Courtesy of the CORMIX project Wastewater Outfalls Non-Point Pollution Sources Courtesy of Roanoke County, VA Storm Water Runoff

Pollutant loads include point and nonpoint sources Courtesy of USGS Water Quality Measurement of a wealth of water quality

parameters Courtesy of Cortland College Limnology Zooplankton, phytoplankton, and other lake inhabitants

Courtesy of Gertrud Cronberg Natural Preservation Restoratio n and Provision for Natural Conditions Courtesy of College of Natural Resources, University of

Idaho Topics Diffusion Advection River Mixing Processes Transformation Air/water Interface Sediment/water Interface

Tidal Mixing Point source near-field: Jets and Plumes Environmental fate and transport modeling

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