Mekong Basin

The Mekong River is one of the world’s great river systems, flowing 4,909 km through six countries: China, Myanmar, Thailand, Lao PDR, Cambodia, and Viet Nam. The source of the river’s great productivity is its seasonal variation in water level and the range of wetland habitats inundated. The Mekong River Basin’s biodiversity is immense, even in comparison with other parts of tropical Asia. Its biodiversity is fundamental to the viability of natural resource-based rural livelihoods of a population of 60 million people living in the Lower Mekong Basin.

To learn more about the Mekong River Basin, visit the sections listed below:

PhysiographyThe Mekong River Basin consists of seven broad physiographic regions featuring diverse topography, drainage patterns, and geomorphology. Learn about the form of the Mekong River channels and how they connect. more>>

ClimateThe Mekong River Basin ranges from the glaciated highlands of the Tibetan Plateau to the hot and humid lowlands of Southeast Asia and encompasses 16 distinct WWF Ecoregions. more >>

Hydrology: The source of the Mekong’s great productivity is its seasonal variation in water level, resulting in rich and extensive wetlands. The annual flood season is especially important in the Lower Mekong Basin where it has shaped the environment and life in the region. more >>

Natural Resources: The Mekong River Basin contains a wealth of natural resources, including one of the world’s largest inland fisheries. more>>

Stories from the Mekong - These regularly updated stories provide a voice to people in the Mekong Basin and can help to bring both contemporary and traditional issues to life. more>>

Latest News

Laos urged to better assess impacts, provide effective mitigation measures, as Luang Prabang dam moves forwards

Cambodia, Thailand and Vietnam requested Laos to conduct rigorous transboundary impact assessments and enhance proposed measures to mitigate potential adverse impacts

Flood and drought remain key challenges for the Mekong: Report

Extreme low flows and extensive flooding of different communities along the Mekong River in 2019 and an increasing number of droughts that have occurred in many parts of the region in recent years are among the signs that the Mekong region is facing incre

New strategy to address Mekong wide challenges near finishing line

A draft Mekong basin development strategy to respond to critical environmental and social pressures from ongoing and planned developments and climate change in the Mekong River Basin has now received a greenlight from a governance body of the Mekong River