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Seafloor site characterization for a remote island OWC device near King Island, Tasmania, Australia


Cossu, R and Heatherington, C and Penesis, I and Beecroft, R and Hunter, S, Seafloor site characterization for a remote island OWC device near King Island, Tasmania, Australia, Journal of Marine Science and Engineering, 8, (3) Article 194. ISSN 2077-1312 (2020) [Refereed Article]

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Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) license (

DOI: doi:10.3390/jmse8030194


We present findings from a geotechnical survey for a gravity-based Wave Energy Converter (WEC) to be installed in King Island, Tasmania. The goal of this work was to assess the deployment location for a 200 kW Oscillating Water Column (OWC) and to identify possible challenges for the foundation of the structure to make it Australia’s first operational offshore OWC for a remote offshore island. The proposed location for this OWC is the southeast coast of King Island, Tasmania, approximately in a depth of ~5.5 m LAT. The survey included sub-bottom profiling, sediment cores, surficial sediment strength by penetrometer drops, seabed imagery, as well as long-term deployment (>6 months) of pressure sondes and an acoustic wave current profiler (AWAC). Our findings demonstrate that the WEC can be installed in the proposed location with significant wave height Hs ~1–1.5 m and peak period Tp of 12–14 s, and that the site exhibits sufficient sand coverage and quasisteady bearing capacity. The period between the survey and prospective deployment is only one year, demonstrating the efficiency of the survey methods (in particular, the use of the penetrometer) and OWC design but also the suitability of the candidate site for this device design.

Item Details

Item Type:Refereed Article
Keywords:wave energy converter, OWC, site characterization, seafloor characteristics
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Energy
Objective Group:Renewable energy
Objective Field:Wave energy
UTAS Author:Penesis, I (Professor Irene Penesis)
ID Code:145300
Year Published:2020
Web of Science® Times Cited:7
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-07-14
Last Modified:2022-08-24
Downloads:11 View Download Statistics

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