Scotland's hydro potential is nearly double the amount previously estimated, according to a study published today.

An update on a 2008 study on Scotland's hydro resources now estimates there could be 1.2 Gigawatts of potential new hydro capacity in 7,043 schemes. This compares to 657 Megawatts (MW) according to the 2008 study.

The study has taken account of micro-hydro schemes under 100 kilowatts (kW) and has factored in payments to supply electricity to the grid.

New hydro schemes must be sustainable and the Scottish Government has today published a short policy statement on its support for hydro while protecting the water environment.

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Energy Minister Jim Mather said: "There is a clear untapped potential for smaller, community hydro schemes which can create green energy and tackle climate change.

"While large scale renewable energy development is helping drive economic recovery, there could also be substantial economic and social benefit from micro-hydro schemes. Today's report identifies the welcome potential for hundreds of new jobs in hydro power in manufacturing, installation and distribution.

"In optimising that potential, care must be taken to avoid adverse impacts on our water environment. Our policy statement published today supports this approach and SEPA is developing guidance to help the sector prevent such impacts. "

Mr Mather noted that while every new scheme must be assessed on its own merits, tapping into new hydro power will tackle climate change and continue to stimulate sustainable economic growth.

A 100 kilowatt scheme operating with an average annual output would generate enough electricity to power over 50 homes every year.

The increase in site numbers compared to the 2008 study is largely in the sub-100 kW range due to the favourable tariff for micro-hydro generation.

(GK/BMcC)