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Change in water level of lake

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(1) Describe the change in water level over time.
(2) What might have caused the change you described?
(3) What are two possible effects on either biological or chemical parameters that might be expected to result from this change in hydrology?

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The solution describes the change in water level over time and the causes.

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1. Chang of water level with respect to time is depicted in graph. Mean of water level of lake over period of time is shown as 73.75 meter. Water level of lake, in general, was below the mean of water level before 1960. However, after 1960 the level of water is recorded more than the mean value. ...

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