Project Summary

Drinking Water-Irrigation
ENVIRONMENTAL IMPACT ASSESSMENT STUDY OF THE PROJECT: " WATER DAM OF KORI BRIDGE, IN THE PREFECTURE OF CHIOS "

Client: Ministry of Rural Development and Food
Year: 2006

ISSUE

The purpose of the study was the renewal and modification of the existed Environmental Terms for the construction of the dam of Bridge Kori, on the riverbed of torrent Parthenis with a capacity of 2.960.000m3 for the irrigation of 13.700 hectares of the broader service area.

SOLUTION

Until recently the water demands were only satisfied by the exploitation of wells which resulted in deterioration of the water quantity and quality of the groundwater aquifers.

This study included the environmental impact assessment for the following works:

• Construction of a dam from “hard embankment” of a maximum height of 41,40 m and a length of 221 m
• Foundation of the dam and waterproofing of the underground
• Construction upstream of a waterproof layer made of reinforced concrete
• Construction of drainage works behind the upstream waterproof layer and downstream the grout curtain
• Construction of a diversion rectangular pipe from reinforced concrete with a length of 85m
• Discharge and water intake works
• Construction of an overflow weir with a length of 35m
• Construction works for accessing the valves
• Installation of monitoring devises
• Construction of a control building
• Installation of electromechanical equipment
• Construction of access roadways
• Construction of a water transmission pipe for irrigation with a length of 3.900m and a diameter of Φ600mm

It must be noted that during this project the following works had already been completed:ΥΔΡΕΥΣΗ

• Foundation of the dam
• Partial access roadway
• Diversion pipe

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. Additionally, the feasibility of the works was demonstrated and a technical description of the works was performed.

Then a reference was made to the suggested works before and after the final design, the works that had been already constructed, those under construction and lastly an analysis of the required works was made.

BENEFIT

The study was submitted to the environmental public authority for the renewal-modification of the Environmental Terms. The construction of the project will start after the approval of the Environmental Terms. The implementation of the project will solve the irrigation problem in the agricultural areas within the dam service area.