It is the last Mekong tributary in Thailand free of developments blocking river flow.

Fish can swim freely into the Songkhram River from the Mekong and use it as a spawning ground.

This replenishes the fish stocks that are an indispensable food source for inhabitants of the Mekong region.

[2] Since 2019 the lower river basin has been designated as a protected Ramsar site under the Ramsar Convention on Wetlands of International Importance,[1] as a result of the combined efforts of local governments, HSBC-Thailand, the National Environmental Policy Office (NEPO), and the World Wide Fund for Nature-Thailand (WWF).

[2][3] This Ramsar site, Thailand's 15th, protects a 92-kilometre stretch of the Songkhram River and 34,000 rai (5,400 ha) of basin.