| Abstract | The Ezousas aquifer is a confined river aquifer close to the sea in the southern part of Cyprus, and it delivers groundwater to a number of private wells for irrigation. During the latest years precipitation in Cyprus has in general decreased by around 20% resulting in reduced groundwater recharge. Beside, a dam was recently constructed upstream the river, resulting in low groundwater table downstream. This is due to the fact that the aquifer is used intensively for irrigation during summertime and not recharged by the river as there is hardly any flow during the dry season. Besides, the precipitation and groundwater recharge during the wet season is not sufficient to compensate for the abstraction. Additionally, private wastewater recharge that earlier contributed to some extent to local groundwater recharge in the area is closed and the wastewater is now led to a public wastewater treatment plant. All these factors have caused the groundwater table to drop drastically inducing water quality problems by saline water intrusion from the sea. To reverse this development, tertiary cleaned wastewater is artificially recharged to the Ezousas aquifer in ponds to increase the amount of available groundwater for irrigation. The groundwater is mixed with water from the river upstream the dam at a ratio of 1:20 and used for irrigation both locally as well as exported to a neighbouring region. The dominant crop in both areas is citrus trees. Domestic water supply is based on dam water and not on water from the Ezousas aquifer. |
| Text | 159570 2006 Case study Cyprus Artificial recharge of tertiary cleaned wastewater HOJBERG A.L., PAUKSTYKS B., CRABTREE B., PASSARELLA G., JORGENSEN L.F., BORSANYI P. HOJBERG A.L., PAUKSTYKS B., CRABTREE B., PASSARELLA G., JORGENSEN L.F., BORSANYI P. Anker Lajer Højberg Denmark Geological Survey of Denmark and Greenland Bernardas Paukstys Lithuania GWP Lithuania, Public Establishment Water House Bob Crabtree UK WRc plc Giuseppe Passarella Italy IRSA Lisbeth Flindt Jørgensen Denmark Geological Survey of Denmark and Greenland Peter Borsanyi Belgium Biomath, Ghent University The Ezousas aquifer is a confined river aquifer close to the sea in the southern part of Cyprus, and it delivers groundwater to a number of private wells for irrigation. During the latest years precipitation in Cyprus has in general decreased by around 20% resulting in reduced groundwater recharge. Beside, a dam was recently constructed upstream the river, resulting in low groundwater table downstream. This is due to the fact that the aquifer is used intensively for irrigation during summertime and not recharged by the river as there is hardly any flow during the dry season. Besides, the precipitation and groundwater recharge during the wet season is not sufficient to compensate for the abstraction. Additionally, private wastewater recharge that earlier contributed to some extent to local groundwater recharge in the area is closed and the wastewater is now led to a public wastewater treatment plant. All these factors have caused the groundwater table to drop drastically inducing water quality problems by saline water intrusion from the sea. To reverse this development, tertiary cleaned wastewater is artificially recharged to the Ezousas aquifer in ponds to increase the amount of available groundwater for irrigation. The groundwater is mixed with water from the river upstream the dam at a ratio of 1 20 and used for irrigation both locally as well as exported to a neighbouring region. The dominant crop in both areas is citrus trees. Domestic water supply is based on dam water and not on water from the Ezousas aquifer. Case studies Lisbeth Flindt Jørgensen, Gyrite Brandt, Veronique Vanderberghe This is the third and last workshop was held in Osnabruck, Germany, in April 2006, in connection to the 3rd Harmoni CA Forum and Conference. The workshop attracted 18 participants from 10 countries 9 EC BE, CY, DK, ES, IT, LT, LV, PL, UK and the US. Joint use of modelling and monitoring for implementing the Water Framework Directive 3rd workshop Case studies Osnabruck, Germany April 4 5th 2006 Internazionale Su invito Case study Cyprus Artificial recharge of tertiary cleaned wastewater INT_Contributo_in_atti_Convegno_18.pdf Contributo in atti di convegno giuseppe.passarella PASSARELLA GIUSEPPE TA.P04.005.008 Integrazione di metodologie per il monitoraggio e la modellizzazione per la gestione delle risorse idriche |
