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Xerias river basin has an area of 174 km2 and extends from the town of Korinthos (North) to the Southern districts of the Korinthos Prefecture, at the frontier with Argolida. Xerias river flow is seasonal with intense fluctuations. The January 1997 storms caused serious disasters.
The works included:
- Open and closed parts combination with composite concrete/steel sections, 1330m long.
A set of necessary works are suggested, along with water conservation and environmental objective target measures.
A full exploration of possible solutions is carried out in the Water Resources Management study, including hydrological and resources modeling.
The works proposed include
o Dam 56m high, earthfill
o Dam 32m high, earthfill or RCC
o Water treatment Works (major) for 100.000 EP
o Water treatment Works (secondary) for 40.000 EP
The project involves the extension of the existing pipeline to a wider area, covering potable water needs around the island, substituting weak underground resources.
The pipeline design extends to a total of 130km and includes numerous related infrastructure such as control tanks and devices and pumping stations.
The dam is 56 m heigh. It is of rockfill type with an impervious clay core, upstream and downstream rock cells, spillway, spillway delivery canal and flip bucket
- The Lasithi plateau diversion to the Aposeslemis reservoir includes a TBM excavated 3,5km long and 14% steep tunnel
- The water treatment plants include pre-ozonation, coaggulation, sedimentation, filtering, post-chlorination and sludge treatment
- The main pipelines from the dam to the water treatment plant, ~ 8 km long, consist of D1200 and D1100 steelpipes and 2 tunnels (1590, 2050m long).
The project includes the Gadoura dam and appurtenant works construction, the water mains to the town of Rhodes (including a small tunnel), the water treatment plant construction.
The project will service the long-term region water supply needs.
The project is funded by National Sources and the E.U.
The dam height is 60m. The embankment dam is earthfill type with an impervious core and the reservoir capacity is ~65 hm3.
