Gadouras Dam is an earthfill dam with a rockfill covering and a central impermeable clay core.
The main geometrical characteristics of the Dam are as follows:
- Dam height: 67 meters
- Crest length: 585 meters
- Crest width: 10 meters
- Dam/coffer dam volume: 3,15 million cubic meters
The total estimated capacity of the reservoir is 67,5 million cubic meters and the estimated effective capacity is 63 million cubic meters.
The maximum mirror surface of the reservoir is 4,380 decares (or 1.082 acres), and the catchment area reaches 148 square kilometers, approximately 11% of the island’s total surface.
of the island's total surface11%
The Dam project includes three water abstractions at absolute altitudes of +99.0 meters, +104.5 meters and +111.5 meters respectively,the abstraction-discharge and drainage tunnels, the ecological flow, the spillway and the neck barrier; instruments for monitoring and recording the behavior of the dam, the A and B roads around the lake of total length of about 14 km, as well as the building and electromechanical facilities of the area.
Dam/coffer dam volume
2. Aqueduct for Supply of Untreated Water towards the WTP
The section of the pipe upstream of the Water Treatment Plant, with a total length of 9.1 km, is made of Φ1300 steel pipes and its maximum design flow rate is 1.55 cubic meters per second.
3. Water Treatment Plant
The existing Water Treatment Plant (Phase A) was designed and built to process 60,000 cubic meters of quality A2 water per day and produce high-quality potable water. The capacity of the Rhodes WTP is projected to increase to 120,000 cubic meters per day, with the construction of the Phase B works.
The most modern and world-renowned methods and purification technologies are used for water treatment. The WTPs stages of treatment include:
The treated potable water is temporarily stored in two tanks of a total capacity of 6,000 cubic meters, and is then led by a pumping station with a total capacity of 3.000 cubic meters per hour to the aqueduct of the city of Rhodes.
The operation of the whole Project is controlled and regulated by a SCADA system, installed in the Rhodes WTP, and monitored by a closed circuit of cameras.
4. Aqueduct for Supply of Potable Water towards the city of Rhodes
The treated potable water is led by the WTP to the Asgourou and Agioi Apostoloi Tanks of the city of Rhodes via the Aqueduct, which mainly consists of the following parts:
- the potable water transfer network, of approximately 39,71 km length
- the head tank which consists of two distinct tanks of 6.000 cubic meters total capacity
- four (4) water pressure interruption and flow control wells, and
- two (2) end of line pump stations in Agia Varvara and Agioi Apostoloi, of a total capacity of approximately 3.600 and 700 cubic meters per hour, respectively.
The aqueduct is made of steel pipes of various sections (Φ1200, Φ1100 and Φ1000), and the maximum design flow rate is 1,39 cubic meters per second.