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Where can ships traveling from the sea reach on the Mekong River?

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Mekong River The Irrawaddy and Mekong river basins and their drainage networks.

Ships traveling from the sea can navigate the Mekong River upstream as far as Phnom Penh, the capital of Cambodia.1

Although Phnom Penh is situated 180 miles (290 km) from the sea, it serves as a major port for the Mekong River valley, connected to the South China Sea via the Hau Giang channel in Vietnam. Additionally, during periods of high water, vessels drawing nearly 15 feet (5 meters) are able to reach Kâmpóng Cham. Further upstream navigation is obstructed by barriers such as the Khone Falls.21