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International Projects TRNC Subsea Water Transmission Pipeline

TRNC Subsea Water Transmission Pipeline

The world's first Suspended Subsea Water Transmission Pipeline Project, carrying drinking water from Türkiye to the TRNC beneath the sea

Between Türkiye (Anamur) and the TRNC

2012-2015

Cyprus, with limited water resources and almost complete reliance on groundwater, faced an increasingly severe water crisis for years.

TRNC Subsea Water Transmission Pipeline

Highlights

Location

Between Türkiye (Anamur) and the TRNC

Client/Employer Information

T.C. Orman ve Su İşleri Bakanlığı / DSİ

Project Scale

80 km subsea pipeline

Infrastructure Components

An 80 km HDPE pipeline, with 66.5 km suspended at 250 m depth

Conveyance Capacity

75 million m³ of clean water annually

Project Duration

2012-2015

Key Feature

The world's first suspended subsea transmission pipeline: a 1.60 m diameter HDPE system at 250 m below sea level

Architectural and Engineering Details

The Türkiye TRNC water connection totals 80 km, of which 66.5 km uses a suspended pipeline system.

The line lies 250 meters below sea level and uses high density polyethylene (HDPE) pipes of 1.60 m diameter.

Installation using specially equipped vessels and remotely operated robots makes the line one of contemporary offshore engineering's most challenging examples.

Technologies and Innovations Used

Suspended pipeline technology: a world first, the system places part on the seabed and suspends the 66.5 km portion representing 85% of the line.

HDPE material: flexibility and durability make high density polyethylene pipes suitable for offshore conditions.

Hydraulic balancing: special systems protect pipes from pressure, flow and wave movements.

Special Solutions

Manufacturing 500 meter pipe sections at the project site and transporting and joining them on the sea surface using specialist vessels.

Subsea engineering using remotely operated underwater robots during deep sea installation.

Designing the pipeline to move flexibly under sea currents, wave loads and earthquake risks.

Project Solutions

Special suspended pipe technology was developed for deep sea engineering.

Wave, current and wind modeling supported adaptation to marine conditions during installation.

Flexible connections and balancing systems protected against seismic and geotechnical risks.

Sustainability

Construction Period

Design maximized pipe compatibility with the environment to protect the marine ecosystem; the suspended section was maximized according to this principle.

Environmental monitoring and marine life protection measures accompanied installation.

HDPE materials were selected for long life, environmental sensitivity and low maintenance, ensuring resource efficiency.

Prioritizing local employment and supply chains supported the regional economy during construction.

The Project's Long Term Impact

Conveying 75 million m³ annually secured the TRNC's drinking and agricultural irrigation water over a fifty year horizon.

It strengthened social and economic sustainability in agriculture, drinking water and tourism.

Declining groundwater levels made a sustainable solution essential for agriculture and drinking water.

The TRNC Subsea Water Transmission Project was launched as a lasting solution. Transporting water from Türkiye through a suspended subsea pipeline represents a world first.