Which environmental factor significantly affects the water levels on Lake Ontario?

Snow melt is a significant environmental factor that affects the water levels in Lake Ontario. During the spring months, as temperatures rise, accumulated snow in the surrounding areas begins to melt. This meltwater flows into tributaries and streams that feed into the lake, leading to an increase in water levels. The volume of runoff generated by snow melt can be substantial, especially in years where there is a significant snowpack.

In addition, the timing of the snow melt can also influence water levels, as earlier or delayed melts can affect the overall water volume entering the lake at different times of the year. This factor is particularly critical in managing the water levels for various activities such as recreation, navigation, and ecological balance.

While wind patterns, rainfall, and temperature changes can all play roles in affecting water levels, the direct contribution of snow melt during spring runoff makes it a prominent factor specifically for Lake Ontario. The combined impact of these elements often varies, but snow melt has a unique contribution in the context of seasonal changes and water management.