By the 5th century, the state exercised control over the lower Mekong and the lands around the Tonle Sap.

It also occurs in flooded forests of the lower Mekong, and gradually moves back to rivers as floodwaters recede.

It is also common in the floodplain of the lower Mekong.

In the lower Mekong, more than 3,235 MW has been met through facilities built largely over the past ten years, while an additional 3,209 MW are currently under construction.

An additional 134 projects are planned for the lower Mekong, which will effectively exhaust the river's hydropower generating capacity.

The mean annual flow entering the lower Mekong from China is equivalent to a relatively modest 450 mm depth of runoff.

An estimated 2.56 million tonnes of inland fish and other aquatic animals are consumed in the lower Mekong every year.

Opened on April 8, 1994, it was the first bridge across the lower Mekong, and the second on the full course of the Mekong.

SEAL Team 2, also stationed at Phnom Penh, was frequently deployed on the lower Mekong.

They migrate during the flood season from permanent water bodies to flooded areas, such as seasonally flooded forests in the middle and lower Mekong.