The Sutlej River (Satluj River): Longest of Punjab’s Five Major Rivers The Sutlej River, also known as the Satluj River, is one of Asia’s most important rivers, flowing through China, India, and Pakistan. As the longest river in Punjab, it plays a vital role in the region’s geography and water systems. Historically referred to as Satadru, the Sutlej River is the easternmost tributary of the Indus River, contributing significantly to the Indus River Basin. Its waters support agriculture, hydroele