JAN 15, 2017 5:14 AM PST

Dam in Laos Stirs Up Controversy and Fish

Hydroelectric dams have become a hot topic in the last decade as biologists and environmentalists fight to make known the damages that dams have on river systems. The Don Sahong Dam along the Mekong River passing through Laos is facing controversy for just that reason between environmentalists, local residents, and the hydroelectric company behind the project, foreign power Mega First Corporation Berhad of Malaysia. Despite growing research that suggests that large hydropower dams emit unacceptably high greenhouse gas emissions in exchange for low economic returns, the biggest issue behind the dam actually concerns fish, not carbon.

Location of the proposed Don Sahong dam on the Hou Sahong channel, Siphandone, Laos - 2008. Photo: International Rivers

The dam is planned for the Siphandone (Khone Falls) area of southern Laos, which also controversially happens to be less than two kilometers upstream of the Laos-Cambodia border. The habitat in the Siphandone is a beautiful riparian island river system, and provides the main channels for fish migrating between Cambodia, Laos and Thailand. Although the Don Sahong is by no means the only dam on the Mekong, its proposed location would directly block the only stream passable by fish all year round. This presents a problem for many locals, who survive on subsistence fishing, as well as commercial fisheries in the Lower Mekong Basin.

Photo: International Rivers

Seventy percent of the 40 million people who live in the Lower Mekong Basin - that’s 28 million people rely “to some extent” on the approximately 850 species of fish there, according to Mongabay News. “Wild fish and other aquatic animals and plants make up over 80 percent of the animal protein the local populations consume. Fish scientists Eric Baran and Blake Ratner of World Fish in Cambodia estimate wild fish capture in the Mekong Basin nets around $2 billion per year,” reports Mongabay.

But the big problem? Following these ichthyologists, 86% of Mekong fish are migratory. Meaning they’re traveling up or downstream to complete life cycles for mating and spawning. This gets more difficult when successive dams block the river. The EIA carried out by the Malaysian company developing the project claims that the project “will not have significant impact on fisheries due to the proposed mitigation measures,” following a summary statement by International Rivers, who is fighting against the project. International Rivers explains that “the claims are based on models which have never been tested in the Mekong, and there are doubts as to whether they could be successful on such a large scale.”

There are also two other concerning factors. The first circles the worry that the dam would divert water from a popular tourist destination, the Khone Phapheng waterfall. People come to see the beautiful waterfall as well as the Irrawaddy dolphins (extremely endangered) that live below it and bolster the local economy. The second, according to International Rivers (IR), is that “local people have received misleading and incomplete information about the likely impacts of the dam from the project’s developers.” IR  further reports that Cambodians downstream from the dam have received even less information.

Despite all these red flags, Mega First Corporation Berhad plans to continue development of the dam in the coming months. To follow this story, keep up to date with International Rivers.

Sources: Mongabay News, International Rivers (1), (2), (3)

About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
AUG 06, 2020
Plants & Animals
Swine Fever Threatens Critically Endangered Indian Hogs
AUG 06, 2020
Swine Fever Threatens Critically Endangered Indian Hogs
The Associated Press reports that the world's smallest and rarest wild pig species is undergoing its own virus lockd ...
OCT 05, 2020
Earth & The Environment
The rising concern of aerosol particles
OCT 05, 2020
The rising concern of aerosol particles
A study from Colorado State University scientists provides insight into the resiliency of aerosol particles, particles f ...
OCT 07, 2020
Plants & Animals
Tasmanian Devils Return to Mainland Australia
OCT 07, 2020
Tasmanian Devils Return to Mainland Australia
For the first time in about 3,000 years, Tasmanian devils have returned to mainland Australia. According to a report fro ...
OCT 07, 2020
Earth & The Environment
The conversion of the Amazon rainforest into savanna may be on the horizon
OCT 07, 2020
The conversion of the Amazon rainforest into savanna may be on the horizon
More dim news from the Amazon: more of the rainforest is at risk of becoming a savanna than previously believed. The fin ...
OCT 17, 2020
Chemistry & Physics
Improving carbon capture technologies using membranes
OCT 17, 2020
Improving carbon capture technologies using membranes
Researchers from the International Institute for Carbo-Neutral Energy Research (I2CNER), Kyushu University and NanoMembr ...
NOV 23, 2020
Plants & Animals
Can Kelp Help Reduce Acidification in the Ocean?
NOV 23, 2020
Can Kelp Help Reduce Acidification in the Ocean?
Our oceans are becoming more acidic; their pH is going down as they absorb CO2 from Earth's atmosphere. It's thought tha ...
Loading Comments...