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2 cards from this section. Quick, good the night before a test.
Define air-water exchange.
Think about the processes in lakes and rivers.
What is a mass transfer coefficient?
It helps measure rates of evaporation.
What is the primary purpose of studying air-water exchange?
Consider why this exchange affects the environment.
True or False: The mass transfer coefficient can be neglected if the water is well-mixed.
Think about the role of coefficients in calculations.
A lake with a diameter of 100 meters has a chemical concentration of 200 ppm. Calculate how long it will take for the concentration to decrease to 50 ppm, assuming a constant evaporation rate.
Consider the relationship between concentration and time.
Given a Gaussian dispersion equation and wind speed, calculate the expected concentration of a pollutant at a height of 1 meter and distance of 300 meters from the source.
Identify all necessary variables in your equation.
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