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dc.contributor.authorSharma, R.
dc.contributor.authorNath, B.N.
dc.date.accessioned2009-01-12T08:35:50Z
dc.date.available2009-01-12T08:35:50Z
dc.date.issued1997
dc.identifier.citationThe Proceedings of the Second (1997) ISOPE Ocean Mining Symposium, Ed by: Chung, J.S.; Hong, S. 146-153p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1970
dc.description.abstractEnvironmental impact assessment studies for deep-sea manganese nodule mining have been initiated in the Central indian Ocean Basin since 1995. As a part of the first phase for collecting the benthic baseline data, echosounding, subbottom profiling, seabed photography, coring and sampling have been carried out at close intervals in 5 selected areas (of 10x10 miles each). Detailed studies on topographic undulations, nodule distributions and sediment characteristics have resulted in the selection of Test and Reference Areas. A strip of 3000 x 200 m was disturbed with a hydraulic device, so as to cause suspension and redistribution of sediment in the near bottom waters and the impact on the seabed as well as close to the bottom was observed. Results show that most of the disturbance is restricted to the disturbed area with some resedimentation in adjacent areas, whereas no significant retention of sediment in the bottom waters is observed. A longterm monitoring of the environmental impact of the Benthic Disturbance has been planned in the study areas
dc.language.isoen
dc.publisherInt. Society of Offshore and Polar Engineering, Colorado, USA
dc.rightsCopyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectferromanganese nodules
dc.subjectenvironmental impact
dc.subjectmining
dc.subjectmonitoring
dc.subjectdistribution
dc.subjecttopography
dc.subjectsediments
dc.subjectbenthic environmental
dc.titleBenthic disturbance and monitoring experiment in the Central Indian Ocean Basin
dc.typeConference Article


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