Hydropower, in large or small scale, is by far the most important source of renewable energy worldwide. It provides about 19% of world’s elektricity. Small hydropower plants are one of the most cost-effective and enviroment benign technology. Currently installed capacity in Europe is about 180GW (exluding pumped storage plants), but it is covered by nearly 90% by large scale hydrpower plants. In Czech republic, about 3% of all produced elektricity is covered by hydrpower plants, exactly about 2,400 GWh anually. Nowadays, it is already exploited nearly 2/3 of all technically available hydro potential for small, mini and microhydro power plants in Czech republic. Unexploited is about 30%, it correspondents to 600 GWh annually. This thesis fol...