Nera (Danube) basin and it is not navigable. After the filling of the artificial Lake Đerdap, as a result of the Iron Gate I Hydroelectric Power Station which was finished in 1972, the mouth of the river into the Danube was flooded. In order to allow the optimal electricity production, the water level of the Nera at the mouth should not go below , while it must not exceed it if the flooding of the banks is to be avoided. Since the mid-1990s, there are significant problems in fixing the river's level, as the process is costly and complicated. In 2018, representatives
Rossola nera in northern Italy as well as the "Rossolo" vine from the Trentino-Alto Adige/Südtirol wine region that is often blended with Schiava (Trollinger). Wine expert Oz Clarke notes that there is long standing questions as to whether the "Rossola nera" vines grown in Corsica are the same vines, or closely related, to the Lombardy Rossola nera. Rossola nera is a late-ripening grapevine that can be very vigorous and high yielding if not kept in check by winter pruning or green harvesting. While the vine has good resistance to spring time frost damage, it is susceptible to the viticultural hazards of botrytis