When are the main flood months for the Tigris and Euphrates rivers?

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Map showing the Tigris and Euphrates river basin and its drainage network across Turkey, Syria, and Iraq, with color shading for elevation, major dams, canals, lakes, and boundaries with neighboring countries. The green areas indicate lower elevations along the river valleys, while higher elevations are shaded in brown and orange. A small locator map in the corner shows the basin's position within the Middle East. — Tigris-Euphrates river system The Tigris and Euphrates river basin and its drainage network.

The Tigris and Euphrates rivers experience two distinct flood periods throughout the year. The main flood, which is driven by snowmelt in the mountains, occurs during the months of April and May.1

In addition to this primary event, the rivers also experience a secondary, irregular rise of minor proportions caused by winter rains, which lasts from November to the end of March.1