What Are The Major Rivers Of Southeast Asia?

What Are The Major Rivers Of Southeast Asia? Drainage of Southeast Asia. Mainland Southeast Asia is drained by five major river systems, which from west to east are the Irrawaddy, Salween, Chao Phraya, Mekong, and Red rivers. The three largest systems—the Irrawaddy, Salween, and Mekong—have their origins in the Plateau of Tibet. What are the