Mekong

The Mekong River is a trans-boundary river in East Asia and Southeast Asia, with an estimated length of 4,909 km and a drainage area of 795,000 km2. It originates in the Tibetan Plateau and flows through China, Myanmar, Laos, Thailand, Cambodia, and Vietnam, making it the world's twelfth-longest river and the third-longest in Asia. The river's extreme seasonal variations in flow and the presence of rapids and waterfalls make navigation difficult, but it remains a major trade route between Tibet and Southeast Asia. The construction of hydroelectric dams along the Mekong has caused serious problems for the river's ecosystem, including the exacerbation of drought.learn more on wikipedia