Another 3,700 hydropower dams are currently under construction or in the pipeline.
Twenty five percent of buildings occupied by companies with green programs in place were powered by solar, 15percentt by wind, 12percentt by geothermal, another 12percentt by hydropower, 11percentt by biomass and 11percentt by "other" undefined sources of renewable energy.
Hydropower represents another mature RES technology which is less volatile than wind or PV [4], but in Germany, there is little potential for further expansion [2].
Iceland's government believes another 30 TWh of hydropower every year could be produced, whilst taking into account the sources that must remain untapped for environmental reasons.
Today, dams are big business in China, and profit-seeking is another major reason behind the hydropower push.
But California, with its wealth of hydropower, must confront another issue: how to keep a hand in the fate of one of the largest hydroelectric systems in the world after it has been broken into pieces.
The approach was successfully tested in two rivers in northern Sweden, one free-flowing and another regulated by cascades of hydropower plants, which were additionally classified based on their impact on short-term flows in sites of similar management.
Within the IWRM-project this river was considered as optional construction site for the implementation of another concept of an underground hydropower plant which utilizes a wood-stave pipeline as the penstock instead of a dam.
It started in a robust way with the installation of cogeneration heat and electric power systems by burning sugarcane bagasse to produce all energy needed in the process and sell the surplus for profit, thus presenting another green alternative to lower the dependence on hydropower.
