Project Summary

Drinking Water-Irrigation

CONSULTANCY SERVICES FOR THE LAND RECLAMATION PROJECTS FUNDED BY THE THIRD SUPPORT COMMUNITY FRAME WORK OF THE MINISTRY OF RURAL DEVELOPMENT. COMPLEMENTARY ENVIRONMENTAL IMPACT ASSESSMENT STUDIES FOR THE PROJECT: CONSTRUCTION OF LAKE RESERVOIR AND CONVEYANCE PIPELINE IN KASTANIA COMMUNITY ON ALONISOS ISLAND, MAGNISIA PREFECTURE

Client: Ministry of Rural Development- Service for Land Reclamation Projects
Year: 2004

ISSUE

The purpose of the study was the renewal of the Environmental Terms of the project for the construction of a water reservoir and a conveyance pipe in the community of Kastania in the island of Alonnisos, in order to satisfy the irrigational and water supply needs of the broader area.

SOLUTION                                                                           View of Alonnisos Island

The water needs of the area were satisfied by wells. The extensive use of wells had a direct impact on the qualitative and quantitative composition of the groundwater aquifer.

The required works based on the modified designs included:

• Construction of an in-river lake reservoir    with an effective capacity of 510.000m3 and a surface area of 120 hectares by constructing a dam with a height of 28m.
• Diversion, washout and water intake pipe with a length of 270m
• Overflow weir with a length of 26m
• Construction of a building for pumping  stations, measuring instruments and valve equipment
• Construction of access roadway
• Protective works for sediment retention (river terraces)

In the current study, the exact locations for the construction of the works were identified and the existing condition of the natural and human environment was examined which included new hydrological and seismological data.

Finally, the environmental impact from the construction and operation of the works was described and the mitigating actions during construction and operation phases were provided. It should be noted that changes resulted from the modification of the technical studies did not induce additional impacts on the environment; they rather mitigate the already identified impacts.

BENEFIT

This study was submitted to the environmental public authority for the renewal of Environmental Terms of the project. The project was constructed in light of the integrated water resources management in the region.