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Mellegue Dam
[edit]The Mellegue dam or Nebeur dam is a Tunisian dam built between 1949 and 1956,[1] on the Mellegue Wadi, about 7 kilometers west of the city of Nebeur (Kef Governorate).
The dam, of the long-span multiple arch type, is 65 meters high and its crest length is 470 meters.[1] The spillway, of the ski jump type with spreading of the blade, has a maximum flow of 5400 m³ per second.
The reservoir has a maximum area of 1600 hectares, and the length of the reservoir is 18 kilometers.[1] The siltation of the reservoir is significant and poses serious problems. The waters of the Mellègue wadi are indeed very muddy, especially during periods of flooding.
| Hamza.DHAHER/sandbox | |
|---|---|
| Official name | Mellegue Dam |
| Country | Tunisia |
| Location | Kef |
| Construction began | 1949 |
| Opening date | 1956 |
| Demolition date | 2016 |
The creation of the work had three goals: the interannual regularization of the Mellègue wadi in order to avoid the flooding of the plain of Jendouba, the irrigation of the lower valley of the Medjerda and the production of electricity.
In May 2016, Chinese hydroelectric construction company Sinohydro won the tender to build a new dam on the river to replace the old, dilapidated dam.
Compared to the previous one, the new Mellegue dam is smaller in terms of volume and does much less damage to the environment.[2]
The Mellegue dam is expected to be completed in September 2023[2]. With a maximum capacity of 305 million cubic meters of water, it will play an important role in protecting the environment in Tunisia.
The Mellegue dam is not only the largest water conservation project under construction in Tunisia, but also a golden opportunity for local workers.
Mellegue Dam New Construction
[edit]Dam Construction:
[edit]This includes the construction of a roller compacted concrete gravity dam and its appurtenant structures on Wadi Mellegue[3]. The dam has a height of approximately 42 m above the Wadi bed (approximately 70 m above the foundation), a crest length of approximately 432 m and width of 7 m. It also includes a fill dyke with a height of approximately 4 m and a length of approximately 65 m to close a depression in the right bank of the Wadi, and a roller compacted concrete dyke with a height of approximately 35 m and a length of approximately 260 m to close a depression in the left bank of the Wadi.[4]
The dam's appurtenant structures includes a main spillway above the dam with a discharge capacity of 8,600 m3/s, a secondary spillway in the right bank of the Wadi with a discharge capacity of 6,100 m3/s, a small hydroelectric power station with installed capacity of approximately 2 MW, in addit
ion to a water intake and a bottom outlet. The dam impounds a reservoir with a storage capacity of approximately 195 million m3. This component also includes all the preparatory, civil, hydro mechanical and electrical works necessary to construct the dam and its appurtenant structures.[4]
Financing:
[edit]The Arab Fund's loan covers about 74% of the total project cost. The Tunisian Government will cover the remaining cost of the project and any additional cost that may arise.[4]
See also
[edit]References
[edit]- ^ a b c "Barrage Mellègue". Dictionnaires et Encyclopédies sur 'Academic' (in French). Retrieved 2022-09-02.
- ^ a b "La Chine construit un méga-barrage, le plus grand de Tunisie". African Manager (in French). 2022-08-25. Retrieved 2022-09-02.
- ^ "List of rivers of Tunisia", Wikipedia, 2022-03-08, retrieved 2022-09-02
- ^ a b c "Projects Details". www.arabfund.org. Retrieved 2022-09-02.