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
Colombana nera is it permitted in the DOC wine. Over the years, Colombana nera has been known under a variety of synonyms including: Basgana, Basgana nera, Basgano, Basgnano, Bazano, Bersegano, Besagana, Besegano, Besgano nero, Besgana, Besgano Di San Colombano, Besgano rosso, Bezgano nero, Colombana and Colombano rosso. Colombana nera Colombana nera is a red Italian wine grape variety that is grown in Emilia-Romagna and Tuscany. Despite similarities in name, the grape did not get its name from nor is it grown in the San Colombano al Lambro region of Lombardy nor is it permitted in the "Denominazione di origine controllata" (DOC) wine