Impacts of submarine cables on the marine environment — A literature review — September 2006 Funding agency: Federal Agency of Nature Conservation Contractor: Institute of Applied Ecology Ltd Alte Dorfstrasse 11 18184 Neu Broderstorf Phone: 038204 618-0 Fax: 038204 618-10 email:
[email protected] Authors: Dr Karin Meißner Holger Schabelon (Qualified Geographer) Dr. Jochen Bellebaum Prof Holmer Sordyl Impacts of submarine cables on the marine environment - A literature review Institute of Applied Ecology Ltd Contents 1 Background and Objectives............................................................................... 1 2 Technical aspects of subsea cables.................................................................. 3 2.1 Fields of application for subsea cables............................................................. 3 2.1.1 Telecommunication cables.................................................................................... 3 2.1.2 Power transmission by cables............................................................................... 4 2.1.2.1 Direct current transmission ................................................................................... 4 2.1.2.2 Alternating current transmission............................................................................ 6 2.1.2.3 Cable types........................................................................................................... 6 2.1.3 Electrical heating of subsea flowlines (oil and gas pipelines) .............................. 10 2.2 Cable installation