Which rivers supply most of the freshwater entering the Persian Gulf?

The freshwater entering the Persian Gulf is primarily supplied by the Tigris, Euphrates, and Karun rivers.12

These rivers reach the gulf by way of the Shatt al-Arab, a waterway formed by the confluence of the Tigris and Euphrates at Al-Qurnah, which later receives the Karun River near its mouth. While these rivers are the main sources of freshwater inflow, the total volume of fresh water entering the gulf is considered small, which, combined with high evaporation rates, contributes to the high salinity of the Persian Gulf's waters.34512