ContactsExecutive Committee Secretary
Rua D. Jerónimo Osório, nº 11, 1º Andar
1400-119 Sta. Maria de Belém
Tel: + 351 21 848 2655
Fax: + 351 21 848 1630
Annex IV: Assessment of Environmental Effects and Monitoring Efforts for Ocean Wave, Tidal, and Current Energy SystemsOperating Agent: Hoyt Battey, United States Department of Energy (DOE), USA
The primary objective of Annex IV is to increase our understanding of the environmental effects of ocean wave, tidal, and current energy development on the marine environment. The Annex aims to facilitate efficient government oversight of the development of ocean energy systems by expanding our baseline knowledge of environmental effects and monitoring methods. One of the primary goals of the Annex is to ensure that existing information and data on environmental monitoring (and, to the extent possible, practices for environmental mitigation) are more widely accessible to those in the industry; national, state, and regional governments; and the public. The Annex facilitates knowledge and information transfer through the final Annex IV Report and publicly accessible database of information.
In the initial phase of this project (2009-2012) Annex participants compiled and assessed information from existing and proposed environmental monitoring studies, and from ongoing research studies. Monitoring protocols and results were documented in a prescribed report format and lessons learned were identified. The Annex culminated in an accessible and searchable database and a comprehensive final Annex IV report published by the OES. The process was supported by experts from the Annex IV nations and beyond, coming together in two experts’ workshops and providing input, advice and review of draft products throughout the process. Greater understanding of the environmental effects and monitoring methods related to ocean energy will foster public acceptance and help to advance ocean energy technology.
Identified potential environmental effects of ocean wave, tidal, and current energy systems; compiled existing monitoring information and identified high priority information gaps; designed and developed a smart and searchable database; and began to enter data.
Specific tasks included:
(a) Identified and reviewed valuable existing syntheses addressing ocean wave, tidal, or current energy systems;
Developed a standard data format; identified, selected, and compiled into the database case study information; and researched analogous technologies (analogues) for additional information.
In an effort to better understand the current state of ocean energy systems and associated environmental challenges, existing projects conducting environmental monitoring studies were identified, selected, and reviewed by participating countries. These environmental case study reports provided detail the specific methods and findings of each project with particular emphasis on identifying potential environmental impacts, environmental monitoring methodologies, and mitigation efforts. Cooperation from project developers was a critical component in this task in order to obtain the information necessary to carry out the proper analysis. The Annex Participants worked closely with identified project managers or developers and only requested information needed to complete the case studies analysis. An experts’ workshop was held to bring together experts from Annex IV nations and other countries to hone the data collection process and analysis.
Specific tasks included:
(e) Developed a standard format for reporting case study information, which may included following fields: type and location of project, device monitored, generating capacity, power source, water depth, special environmental issue of concern, planned duration of monitoring efforts, frequency and timing of monitoring, measurement strategy and technology, estimated project cost, monitoring cost and funding source, relevant findings, and strengths and weaknesses of monitoring approaches and mitigation efforts.
Final analysis of all information and case studies; completion of preliminary, draft, and final reports; experts workshop; distribution of final report and database on internet website.
The Annex IV report compiled information and analyses from Years 1-3. The Final Annex Report was completed at the end of Year 3. A second experts’ workshop was held to review the progress of the Annex and provide input on potential future activities under an extended Annex. Comments from Annex participants and workshop participants were incorporated into the final database and report products.
Specific tasks included:
(k) Analyzed the synthesis data, case study data, and analogue information and prepared a preliminary report for initial review including a summary of the database information and any lessons learned and best practices for monitoring and mitigating environmental effects of ocean wave, current, and tidal energy devices.
Final Annex IV Report and Database
The Tethys database, named after the Greek titaness of the ocean, is a multimedia database that houses environmental research and monitoring information, as well as an interactive map. The Final Annex IV Report provides an overview of the Annex and contains three case studies of specific interactions of marine energy devices with the marine environment that survey, compile, and analyze the best available information in one location. These case studies address: 1) the physical interactions between animals and tidal turbines; 2) the acoustic impact of marine energy devices on marine animals; and 3) the effects of energy removal on physical systems. Each case study contains a description of environmental monitoring efforts and research studies, lessons learned, and analysis of remaining information gaps. Much of the Annex IV information and metadata were collected through project site and research study metadata forms, which were widely distributed to the representatives of the member nations, members of the OES Executive Committee, marine energy developers, and researchers.
If you would like to contribute to the Annex IV effort by submitting a project site or research study metadata form, please visit the following website:
In May 2013, the Annex was renewed for a second three-year phase to run through May 2016. Future activities of the renewed Annex will focus on continuing to build a community of practitioners and experts in the environmental effects of ocean energy, with information gathering and dissemination efforts to provide the most robust body of knowledge regarding the potential impacts marine renewable energy devices may have on marine animals and the surrounding environment.
The Operating Agent and partners will continue to coordinate the following tasks over the next three years among the Annex’s Participants:
The first phase started in January 2010 and concluded in March 2013. The Annex was renewed for a second three-year phase in May 2013 to run through May 2016.