UK Weighs Environmental Costs of Harnessing Tidal Power

The UK government is hoping to achieve part of it's renewable energy production mandate by harnessing the tidal power of its largest river. Opponents say the plan could destroy the river's ecosystem.

1 minute read

November 28, 2009, 5:00 AM PST

By Nate Berg


"The UK government wants to tap into the country's great potential for wind, wave, and tidal power. But proposals to harness the River Severn are so far generating mostly controversy.

At 220 miles, the Severn's the UK's longest river. But what attracts clean energy engineers is the tidal action at the river's mouth. Its estuary has the second greatest tidal range in the world. Capturing the energy of that tidal flow could meet five percent of the entire country's electricity needs.

...Critics of the barrage, point to the Bay of Fundy in Canada, the highest tidal range in the World. There, a small barrage caused both silting and coastal erosion. On the other hand, a barrage at La Rance in France has been a reliable source of energy for forty years, without silting."

Wednesday, November 25, 2009 in Living on Earth

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

October 20, 2026 - Zachary Whalen

A pencil rendering of Foundry Park, which shows skyscrapers and public green spaces.

Chicago breaks ground on $3 billion megadevelopment

The new neighborhood, titled Foundry Park, will one day host 3,700 residences.

October 23, 2026 - Chicago Sun Times

A yellow, two-story building named Ferns with two American flags.

This MA town is drowning in its own sewage — and residents like it that way

Susan Murcott, a waste water expert, said if Carlisle didn't address their leaking sewage, the problem could turn “deadly.”

October 22, 2026 - Boston Globe

A pig poking its snout between the bars.

Iowa taxpayers are paying thousands to clean manure out of their water

While the Clean Water Act makes states responsible for regulating factory farms that discharge pollutants, Iowa has turned a blind eye to the polluting farms.

October 27 - Inside Climate News

Amtrak officials cut the ribbon at the new Seattle facility.

Amtrak cuts ribbon on Seattle Airo maintenance facility

The $250 million, nearly 100,000-square-foot building can house an entire Cascades Airo trainset.

October 27 - Railway Supply

One of Google's power plants pumping pollution into the air.

To power data centers, Google seeks autonomous control of thousands of homes’ electricity

The tech company has signed a deal to indirectly pay Mid-Atlantic residents to reduce their power demand when the grid is strained.

October 27 - New York Times