Sivas Water Supply and Sanitation Project

Existing water supply and sewerage services were not sufficient in Sivas. Water supply system failed to provide continuous and adequate supply of safe drinking water. False connections of waste water sewers and storm water drains caused unhygienic flooding of sewerage system. There was no waste water treatment plant, and Kızılırmak in near vicinity of Sivas, was highly polluted.  Need for improvements of related services were assessed. Municipality of Sivas, KreditanstaltfürWiederaufbau (KfW) and European Investment Bank (EIB) agreed to co-finance implementation of rehabilitation measures under this project. 

• Water supply component (Lot 1) of the Project comprised physical investments such as network zoning, bulk metering, hydraulic modeling and loss reduction.
• Sewerage component of the Project comprised separation of false waste water connections from storm water sewers and establishing a new primary storm water collection system (Lot 2), and construction supervision of a WWTP for 340,000 inhabitants (Lot 3).

Lot 1: Water Supply

1. Network Zoning and Hydraulic Modeling (Extended period dynamic simulations)
2. Leakage Management

Lot 2: Wastewater collection and stormwater drainage

1. Separation of false wastewater connections from stormwater box culverts and establishing a stormwater drainage systems

Lot 3: Construction of a new wastewater treatment plant

Services provided by ALTER;

• Digitization
• Collection and evaluation of operation statistics
• Flow and pressure measurements
• Elaboration of long-term supply concept
• Hydraulic modeling and re-design of trunk system
• Assessment of results and recommendations for rehabilitation
• Sivas Water Utility Department (SIBESKI) Staff training for hydraulic modeling, leakage control
• Network analysis in  pilot districts for leakage management
• Design of district metering system
• Design of installation programme
• Preparation of long-term and middle - term investment strategy
• Identification of priority investments
• Tendering (FIDIC RED BOOK) and supervision of bulk meter installation
• Assessment of false connections using video inspection of box culverts
• Assessment of existing sewers for diversion of separated wastewater sewers
• Detailed design of primary stormwater system
• Tendering (FIDIC RED BOOK) and construction supervision
• Conceptual design of  WWTP
• Tendering (FIDIC YELLOW BOOK)
• Construction supervision following FIDIC Yellow Book.