Between 2010 and 2014, the average annual water runoff from the Great Lakes totaled around 890 millimeters over the lakes' surfaces. Both decreased and increased water levels have at times been reason for concern for the Great Lakes at both extremes.
Average hydrological input and output of the Great Lakes from 1965 to 2014
(in millimeters)
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GLERL. (January 1, 2016). Average hydrological input and output of the Great Lakes from 1965 to 2014 (in millimeters) [Graph]. In Statista. Retrieved December 21, 2024, from https://www.statista.com/statistics/1081495/great-lakes-hydrology/
GLERL. "Average hydrological input and output of the Great Lakes from 1965 to 2014 (in millimeters)." Chart. January 1, 2016. Statista. Accessed December 21, 2024. https://www.statista.com/statistics/1081495/great-lakes-hydrology/
GLERL. (2016). Average hydrological input and output of the Great Lakes from 1965 to 2014 (in millimeters). Statista. Statista Inc.. Accessed: December 21, 2024. https://www.statista.com/statistics/1081495/great-lakes-hydrology/
GLERL. "Average Hydrological Input and Output of The Great Lakes from 1965 to 2014 (in Millimeters)." Statista, Statista Inc., 1 Jan 2016, https://www.statista.com/statistics/1081495/great-lakes-hydrology/
GLERL, Average hydrological input and output of the Great Lakes from 1965 to 2014 (in millimeters) Statista, https://www.statista.com/statistics/1081495/great-lakes-hydrology/ (last visited December 21, 2024)
Average hydrological input and output of the Great Lakes from 1965 to 2014 (in millimeters) [Graph], GLERL, January 1, 2016. [Online]. Available: https://www.statista.com/statistics/1081495/great-lakes-hydrology/
