Record Details

Assessment of impact on seafloor features in INDEX area

DRS at CSIR-National Institute of Oceanography

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Field Value
 
Title Assessment of impact on seafloor features in INDEX area
 
Creator Sharma, R.
 
Subject environmental impact
ocean floor
sub-bottom profiling
underwater photography
benthos
environment management
 
Description Observations on seafloor features from subbottom profiling and seabed photography data show that the undisturbed and natural conditions before the benthic disturbance undergo a substantial change after operation of the disturber. The effects can be seen in the form of deep trenches and grooves, formed by the action of the sleds and the pumping of the sediment along its path, as well as sediment piles on either side of the track. Biological traces such as fecal coils, casts, tubes, burrows and trails get obliterated in the areas of disturbance and resedimentation. The smooth, uniform nature of the seafloor observed in predisturbance phase shows microtopographic changes in and around the disturbed area as a result of sediment excavation and resettlement. Vertical mixing as well as lateral transport of sediment alter the geological, biological, physical, and chemical conditions on the seafloor, which need to be monitored over time to assess the process and the time taken for restoration of environmental conditions
 
Date 2009-01-09T08:08:10Z
2009-01-09T08:08:10Z
2000
 
Type Journal Article
 
Identifier Marine Georesources and Geotechnology, Vol.18; 237-250p.
http://drs.nio.org/drs/handle/2264/1646
 
Language en
 
Rights Copyright [2000]. 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.
 
Publisher Taylor and Francis