Municipality of Hersonissos – Pilot City

Municipal population (de facto): 53.337
Municipal Area 271.580 km2, Total coast line: 38 km
Population Density (Municipal de facto population / surface): 5.091

Hersonissos is a popular tourist destination. During summer, population increases due to the high tourist influx. Hersonisos Municipality hosts approximately six million overnight stays every tourist season (April to October).

Hersonissos features a temperate climate, with prolonged dry summer season and wet winter. Temperature fluctuates between 21.8oC  and 28.7oC  during summer and 9oC  and 15.3oC  in winter, while mean annual temperature is about 16.7oC. Precipitation rate is of 481,1 mm/year. The average monthly rainfall fluctuates between 0.5 mm in July and 99 mm in January.

WATER RESOURCES

Hersonissos water supply is based on groundwater. 90 borehalls comprise the unique water sources for drinking water and irrigation. They have a depth varied from 100 m to 500 m. There is no water treatment, except of chlorination for potable water. The tanks for storing water are made of reinforced concrete, and the pipeline network is made of PVC or PE.

Water, wastewater and stormwater management in Hersonissos are under the responsibility of the Municipal Enterprise for Water and Wastewater of Hersonissos (MEWWH). MEWWH supplies an estimate of approximately 4.000.000 m3 of water, provided by a separate drainage system. The existing drainage network of Limin Hersonissos, is very limited and small, because is intended to substitute non-existent or inadequate and abused natural hydrographic network (beds). This network consists of small inadequate parts of old and new pipelines with rainwater wells located mainly along the beach roads. This network, however, is inadequate and combined with the virtual absence of lowland riverbed forms an explosive mixture, especially in relation to expected flooding events. Hersonissos WWTP is 12 year old.

WATER-RELATED ISSUES AND CHALLENGES

• High tourist influx over summer months

• Expected further tourist development in the area

• Salinisation of the groundwater aquifer

• High losses in the distribution network

• Aging of existing networks

• Expected city expansion

• Storm water management

INSTITUTIONS INVOLVED IN THE REGIONAL WORKING GROUP ON ENERGY EFFICIENCY IN THE URBAN WATER CYCLE

• Municipality of Hersonisos

• Municipal Enterprise for Water and Wastewater of Hersonissos (MEWWH)

• Decentralized Administration of Region of Crete

• Water Directorate

• Energy Agency of Region of Crete

• Directorate of Environment & Spatial Planning