4.2 - Rivers
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Practice Questions
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What is molecular diffusion?
💡 Hint: It relates to concentration gradients.
Define bulk flow.
💡 Hint: Think of moving water in a river.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is molecular diffusion?
💡 Hint: Think about gradients.
True or False: In a river, diffusion is the most significant transport mechanism.
💡 Hint: Consider the flow of water.
1 more question available
Challenge Problems
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Calculate the time required for a pollutant to diffuse from one end of a 100 m lake to the other, assuming a diffusion coefficient of 1.0 x 10^-5 m^2/s.
💡 Hint: Use the formula for diffusion time.
Discuss the environmental implications of relying solely on diffusion for pollutant transport in an unsaturated soil layer.
💡 Hint: Think about pollutant persistence in time.
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