Question 1017 of 223 · California Water Treatment Operator Exam
Water in a deep reservoir often forms layers in summer because
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Correct answer to question 1017
- C: the surface warms and becomes less dense than the cold water below
Explanation
Warm water floats on denser cold water, creating stratification with an epilimnion on top and a hypolimnion below. This layering affects oxygen, iron, manganese and taste and odor.
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