Anson Mackay: Lake Baikal Threatened by Proposed Dam

The Conversation:

Mongolia is hoping a massive dam on its largest river could provide much needed power and water for the country’s booming mining industry. However environmental groups are concerned that the hydroelectric power plant and a related pipeline project will do immeasurable environmental damage to oldest and deepest freshwater body in the world: Lake Baikal...

he Shuren Hydropower Plant, planned on the Selenga River in northern Mongolia, was first proposed in 2013 and is currently the subject of a World Bank-funded environmental and social impact assessment. In tandem, Mongolia is also considering building one of the world’s largest pipelines to transport water from the Orkhon River, one of the Selenga’s tributaries, to supply the miners in the Gobi desert 1,000km away.

By far the largest and most important of the 350-plus rivers that flow into Lake Baikal is the Selenga River, which contributes almost 50% of the lake’s water. The Selenga and its tributaries cover a vast area, much of it in northern Mongolia, and the catchment of Lake Baikal is bigger than Spain. The river enters Lake Baikal through the Selenga Delta, a wetland of internationally recognised importance.

The delta is crucial to the health of Lake Baikal. Its shallow waters are a key spawning ground for Baikal’s many endemic fish and is on the migratory route for millions of birds every year. It also filters out impurities flowing through the river before they reach the lake.

Report highlights development threats on Canadian watershed

Hannah Hoag, reporting for Nature:

 

Without better governance, a robust science programme and stronger regulations for extractive industries and hydroelectric developments, Canada’s massive Mackenzie River basin could continue to face destroyed landscapes and massive bills for environmental clean-ups, an international panel of experts warns in a report issued today.

The Mackenzie River is the longest river in Canada, pouring 10.3 million litres of fresh water, the equivalent of four Olympic swimming pools, into the Arctic Ocean per second. Its ecosystems are mostly intact. They provide breeding habitat for migratory birds and include wetlands, boreal forest and carbon dioxide–absorbing peat lands, but they are at risk under warming climate scenarios and natural-resource development.