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What is the average discharge of the Don River at its mouth?

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The average discharge of the Don River at its mouth is approximately 31,800 cubic feet (900 cubic metres) per second.1

It is important to note that this flow is subject to significant annual variation, and the total amount of water discharged has been reduced by approximately 20 percent since 1950 due to water diversion for irrigation and evaporation from artificial reservoirs.1