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When do spring floods occur on the Yenisey River?

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Yenisey River The Ob and Yenisey river basins and their drainage networks.

Spring floods on the Yenisey River are associated with the thawing of snow and ice, which occurs at different times depending on the river's location:

Upper reaches: Thawing begins toward the end of April.1
Middle reaches: Thawing occurs in May.1
Lower reaches: Thawing occurs from May to mid-June.1

These spring floods are characterized as violent and are followed by a rapid fall in water levels, which is later punctuated by summer and autumn rain floods.12