Review of recovery efficiency for modified free-fall grab SCOPUS KCI

Title
Review of recovery efficiency for modified free-fall grab
Author(s)
Lee, G.C.; Chi, S.-B.; Park, C.-K.; Yoo, C.M.; Ko, Y.-T.; Ham, D.J.
KIOST Author(s)
Chi, Sang Bum(지상범)Yoo, Chan Min(유찬민)Ko, Youngtak(고영탁)Ham, Dong Jin(함동진)
Publication Year
2004
Abstract
Deep-sea Resources Research Center (DRRC) has been using a free-fall grab (FFG) for the resource evaluation of polymetallic nodules in the KODOS (Korea Deep Ocean Study) area, NE Pacific, since 1992. A FFG model (Model 4200, Benthos) adapting one glass buoy system (diameter 17 inch, net buoyance 25.4 kg) has been used until 1993. Since then, DRRC has carried out a study to increase the recovery rate of FFG and it was found that a revised system adapting an additional buoy (diameter 10 inch, net buoyance 4.5 kg) gives improved results. The nodule sampling tests were performed using two different models for the same study area and the resulting recovery rates were compared. The result shows no distinct difference in recovery time between two models, but average recovery rate of the revised model was increased to 99.44% from 96.06% of the original model.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5352
DOI
10.4217/OPR.2004.26.2.361
Bibliographic Citation
Ocean and Polar Research, v.26, no.2, pp.361 - 365, 2004
Publisher
Korea Ocean Research and Development Institute
Subject
deep sea; economic geology; marine resource; nodulation; recovery method; Pacific Ocean
Keywords
Free-fall grab; Recovery rate
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

deep sea mineral resources,deep sea sediments,심해저 광물자원,심해저 퇴적물,심해 환경

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