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
Glyka Nera 64 passes north of the town. Glyka Nera Glyka Nera (Greek: Γλυκά Νερά, , meaning "sweet waters"), is a rapidly growing suburb in the northeastern part of Athens, Greece. Since the 2011 local government reform it is part of the municipality Paiania, of which it is a municipal unit. The municipal unit has an area of 9.238 km. Glyka Nera is situated on the eastern slope of the northernmost part of the forested Hymettus mountain. It is 11 km east of central Athens, and 11 km northwest of the Eleftherios Venizelos International Airport. Adjacent towns are Gerakas to the northeast