Besides compliance with the various regional Safeguarding Plans (for plant located biodiversity/. 78 ENEL SUSTAINABILITY REPORT 2013 ENVIRONMENT in Europe), which impose an obligation to release minimum flows, Enel has in par allel launched in Italy, Spain and South America tests regarding the real impact on the ecosystem of such flows and, in some specific cases, studies aimed at analyzing the changes in daily flow caused by the intermittent introduction of turbinated water downstream from power plants.