File name: RioNegro_annuallow_1903-2023.jpg
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The annual low water level on Rio Negro each year since 1903. The 2023 low set a new record—12.7 meters on the gauge at Manaus as of October 27 —edging out 1963 and 2010. Image courtesy René Garreaud, University of Chile, based on data from the Port of Manaus.