Irrawaddy Dolphin in Mekong River

New Cambodian dam poses threat to the Mekong’s rare Irrawaddy Dolphins

Mekong advocates fear the dam would degrade the dolphins’ habitats, challenging their survival.

Shortly after Cambodian government as well as WWF just congratulated on the increase of the population of Irrawaddy Dolphins, rare to the Mekong River, from 80 to 92 last year, the arrival of the news that a new dam, Sambor, is planned on the mainstream river in Kratie province has prompted concerned parties to become concerned about the dolphins’ fate.

 Irrawaddy dolphins, being listed on the IUCN Red List of Threatened species, are regarded among ecologists here as one of the most critical indices of the Mekong’s health, especially the population in Kratie, which is remoted and isolated.

As such, the population in Kratie has been well taken care of by conservation organisations as well as the Cambodian government itself to ensure that their population is always sustained as well as the chance of their survival. 

The area has over the years developed into a ground for eco-tourism in replacement of illegal fishery, which in turn poses threat to the population and the environment.

Despite good care, the news about Sambor dam construction plan has dampened the concerned parties’ hopes on the species’ survival. The dam, if built, would run across the river with its 18 km-long barrier and  has 82km-long reservoir to generate and supply electricity to the growing businesses and industry in Cambodia, especially after the influx of Chinese investments.

What would be traded to the growth of the country’s economy  is the rich biodiversity of the Mekong, the dolphins included, which has long fed upto 80% of Cambodia’s population, as well as residents in her neighbouring countries of Thailand, Lao PDR, and Vietnam.

The existence or the disappearance of Irrawaddy Dophins are therefore not something totally isolated but linked to others’ fates. Any impacts on them mean impacts on the environment which in turn would one day affect citizens of the Mekong_no matter where they live.

Irrawaddy Dolphin in Mekong River, Kratie
Kayaking for tourist to watch Irrawaddy Dolphin in Mekong River, Kratie
The village of Kampi is an important habitat of Irrawaddy Dolphins in Kratie area. The area has over the years developed into a ground for eco-tourism in replacement of illegal fishery, which in turn poses threat to the Irrawaddy dolphins’ population and the environment, raising good income to communities. (Photo: Sayan Chuenudomsavad)
Irrawaddy Dolphin habitat in Mekong River, Kratie
The vast water area in the river in the village of Kampi is where Irrawaddy dolphins inhibit, coexisting with local fishermen. (Photo: Sayan Chuenudomsavad)
Irrawaddy Dolphin habitat in Mekong River, Laos-Cambodian border
This is believed to be one of the last three Irrawaddy Dolphins inhibiting in the Mekong water near Laos-Cambodian border. It was once a popular ground for eco- tourism of Irrawaddy Dolphins, but over the years the population there has been facing various threats, resulting in a plunge in the population, with only three reportedly remaining in the water.  (Photo: Sayan Chuenudomsavad)
Don Sahong Dam
Don Sahong dam, which is being built on the mainstream river close to the border in the so-called “400 islands” in southern Laos, is not far from Irrawaddy dolphins’ habitat. It is believed to be a crucial factor affecting the Mekong’s ecosystem and health, which in turn affects survival and life adjustment of every species there. (Photo: Sayan Chuenudomsavad)

Read more: Mekong at a Crossroad