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The Guardian has an article on plans to expand micro-hydro generation in Britain - Canals and rivers to lead micro-hydropower revolution Britain's canals and rivers have already been heralded as a low-carbon way to tranport Tesco groceries, a test-bed for hydrogen boats and a opportunity to build more wind turbines. Now they're being billed as a chance for micro hydropower to flourish under new plans unveiled today by British Waterways, which maintains 2,200 miles of the country's canals and rivers. In partnership with The Small Hydro Company, British Waterways said it intended to build 25 small-scale hydro-electric schemes with a capacity of 40MW, enough to power 40,000 homes. While far smaller in capacity than offshore wind farms switched on in 2008, the hydro initiative hopes to raise £120m in private capital over the next three years, create 150 construction jobs and reduce CO2 emissions by 110,000 tonnes annually. Underwater turbines will be installed next to existing weirs and will not affect the navigation of canals and rivers. Larger waterways such as the Trent and Severn rivers will be used for the first hydro power projects, with many of the installations likely to be located in the East Midlands and Yorkshire. It is hoped the first of the 25 hydro installations will be generating renewable electricity by 2010.

The use of water to harness energy has been around for thousands of years but it is only in the modern times that it has been employed to generate electrical energy, which is called hydropower.

What does the future hold for the world's largest renewable energy source, hydropower? Hydropower is an incredibly old source of energy, tracing its usage back to the watermills that have been a staple of civilisations since ancient times. Today, it is the largest source of renewable energy in the world, with an installed capacity of over 1126GW in 2018. Hydropower is particularly prominent in China, where the world's largest power station Three Gorges power plant in Hubei province produces 22.5GW. Other massive projects also dot the country, including the Xilodu (12.3GW) and Longtan (6.3GW) dams.

Here's a wave power technology which you may not have heard of: It's called the Searaser and (though only in prototype stages, I've got some reservations about how well it may scale up, as well as the name which somehow I always see as 'Sea Eraser') it may be worth watching. The principle is fairly simple and proven in a different context: Use the Searaser to pump quantities of sea water up a hill where it can be stored in ponds until needed and then released downhill to drive hydroelectric turbines to create power. This is how the Searaser works:

With the passing of its Renewable Energy Act - legislation that spent 19 years in limbo - the Philippines can save over US$2.9 billion, a WWF and University of the Philippines study has found. The savings would come from increasing the country's renewable energy share in its power generation mix from 0.16 per cent to 41 per cent from wind, solar, ocean, run-of-river hydropower and biomass.

Brian Keane, who leads a nonprofit called Smart Power, wants to do for renewable energy what the "Got Milk?" campaign does for milk and what the "Fabric of Our Lives" campaign does for cotton-he wants to make wind and solar and hydropower and geothermal energy really cool, and get more people to buy them. Here's one way he is going about it, with a little help from a friend:

The 2008 figures are in from the new REN 21 Renewables Global Status Report: Renewable power capacity (excluding large hydropower) increased a hefty 16 percent last year, which is remarkable given that world oil use actually declined. Growth in some renewable sectors was even more impressive. Biodiesel production increased 34 percent, and solar power took the prize with a 73 percent jump. Renewable energy has not entirely escaped the impact of the global recession - growth this year will almost certainly be slower - but it is clear that global energy markets have turned a corner. Political support and business investment in new energy sources have reached the point where the new industries appear hard to stop. REN 21 reports that 64 nations now have policies to promote renewable power generation. Scientists, engineers, and entrepreneurs across the globe are responding with unprecedented innovation. Overnight, the energy business has begun to resemble the I.T. industry more than it does the energy industry of the past.

New York City, United States [RenewableEnergyWorld.com] Close to US $155 billion was invested in 2008 in renewable energy companies and projects worldwide, not including large hydro. Of this $13.5 billion of new private investment went into companies developing and scaling-up new technologies alongside $117 billion of investment in renewable energy projects from geothermal and wind to solar and biofuels. The 2008 investment is more than a four-fold increase since 2004 according to Global Trends in Sustainable Energy Investment 2009, prepared for the UN Environment Programme's (UNEP) Sustainable Energy Finance Initiative by global information provider New Energy Finance. Of the $155 billion, $105 billion was spent directly developing 40 GW of power generating capacity from wind, solar, small-hydro, biomass and geothermal sources. A further $35 billion was spent on developing 25 GW of large hydropower, according to the report.

A 2000 report by the World Commission on Dams showed a huge fall in popularity, leading some to declare the era of the dam was over. Almost two decades on and they are enjoying something of a renaissance. Andrew Tunnicliffe speaks with Professor Benjamin Sovacool about the impact dams have on the socioeconomics of a country and why corruption is often rife.

Hydro-Electric Corporation (Hydro-Electric) is a government business entity owned by the State of Tasmania. It generates power using renewable energy. The company owns and operates dams, hydro power stations, and wind farms.