More than a century of records in the Great Lakes basin indicate no regular, predictable cycle. extremely low levels such as in 1926, the mid-1930s and mid-1960s.extremely high levels, such as in 1952, 19 to 1986.Long-term (multi-year) water level fluctuations result from persistent high or low net basin supplies. The primary natural factors affecting lake levels include: operating procedures of the regulatory structures.
amount of water supply received by each lake.outflow characteristics of the outlet channels.The water levels of the Great Lakes depend on the: These factors operate on a time-scale that varies from hours to years. On this pageįluctuations in water levels in non-tidal areas are the result of natural factors and human activities. Learn about long-term, seasonal and short-period water level fluctuations in the Great Lakes, and how they’re affected by wind-induced waves. Aquaculture collaboration and responsibilities.Environmental management in aquaculture.
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