Conventional hydroelectric power generation involves the storage of large volumes of water behind a dam. Run-of-river hydro power is used to describe hydroelectric power generation where there is little to no water storage.

Images (left to right, top to bottom):
- East River Installation, N. Y., USA - Courtesty of Verdant Power - www.verdentpower.com
- Beochlich Hydr, Scotland - Courtesy of Triodos Bank - www.triodos.co.uk
- SHP Transteni, Romania - Courtesy of Bogdan Popa - www.hidroelectrica.ro
- SHP Bistrai, Romania - Courtesy of Bogdan Popa - www.hidroelectrica.ro
- SHP Albestii, Romania - Courtesy of Bogdan Popa - www.hidroelectrica.ro
- River E Hydro, Scotland - Courtest of RWE Npower - www.rwepi.com