The Mekong River: Cambodia's Lifeline to the South China Sea

The Mekong River is Southeast Asia's longest river (approximately 4,350 km) and Cambodia's defining geographic feature. It enters Cambodia from Laos in the north, flows south through the heart of the country—passing the capital, Phnom Penh—where it splits into the Bassac and Mekong branches, then continues into Vietnam's vast Mekong Delta before emptying into the South China Sea. The river's annual flood pulse drives Cambodia's unique Tonlé Sap lake system, which expands up to fivefold in wet season, supporting one of the world's most productive inland fisheries. The Mekong provides water for irrigation, transportation, and daily life for millions of Cambodians. Its health is critical to the nation's food security, economy, and cultural heritage.