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
Bracciola nera Bracciola nera Bracciola nera is a red Italian wine grape variety that is primarily found in the Liguria and Toscana wine regions of western Italy. The only "Denominazione di origine controllata" (DOC) that Bracciola nera plays a significant role is in the Colli di Luni DOC of Ligura where the grape is permitted to be blended with Sangiovese, Canaiolo, Pollera nera, Ciliegiolo, Vermentino nero and other varieties. A late-ripening variety, Bracciola nera usually contributes acidity to blends. In his posthumously published work "Trattato della coltivazione delle viti, e del frutto che se ne puô cavare" (1600), the Italian viticulturist Giovan