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Chrysochou Basin

 

The main aquifers of the Chrysochou Basin are: a) The Terra and Koronia Limestones; b) The Gypsum; c) The Coastal Plain; and, d) The Alluvial.

 

a) The limestones of Terra and Koronia are in vertical and horizontal hydraulic connection and form a single aquifer, which is locally important for domestic supply and irrigation. The Terra and Koronia Limestones Aquifer is developed on either side of Chrysochou basin between the villages of Kathikas and Neo Chorio in the western highlands and Steni and Lysos in the eastern highlands. The aquifer provides good quality water at the sides of the valley, which are the recharge areas, but its water becomes saline along the axis of the valley where the limestone changes laterally into marls. The annual recharge of the aquifer has been estimated at 3.3 million m3. Several well-known springs flow out of this aquifer, including those of the Baths of Aphrodite, Kritou Terra, Akourdalia and Lysos.

 

b) The Gypsum Aquifer covers an area of 25 km² and develops mainly between the villages of Polemi–Stroumpi–Theletra–Giolou.  Its thickness is about 45 m. Its water is suitable only for irrigation because of high concentration of sulphate salts.

 

c) The Coastal Plain Aquifer stretches from Lachi in the west to Nea Dimmata in the east. It has a length of 22 km, a width of 0.3–2 km and covers an area of 22 km². It consists of gravels and sands with lenses of clayey silt of Pleistocene age. Its average thickness is 10 m. Its average annual replenishment is 6 million m3. Borehole yields range from 10 to 25 m3/h. Its base of Pliocene marls and pillow lavas is below sea level and over-pumping has caused seawater intrusion in the Limni area. 

 

d) The Alluvial Aquifer develops in the rivers of Chrysochou and Makounta. The Chrysochou River aquifer consists of gravels, sands and sandy silt with lenses of silt and clay and attains a significant thickness downstream of Skoulli village. Upstream of this point the river divides into two branches, the Klavaris, which drains from the Polemi area and its water is contaminated with sulphate salts, and the Stavros tis Psokas, which drains from the Diabase and has good quality water. The aquifer of the latter branch attains a thickness of 30 m and its water is suitable for domestic supply. The Makounta alluvial aquifer consists of gavels, boulders and sands. Its thickness ranges from 15 to 40 m and its water is suitable for domestic supply and irrigation.

 

 

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