Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds OTHER

Title
Extent of impact of deep-sea nodule mining midwater plumes is influenced by sediment loading, turbulence and thresholds
Author(s)
Muñoz-Royo, Carlos; Peacock, Thomas; Alford, Matthew H.; Smith, Jerome A.; Le Boyer, Arnaud; Kulkarni, Chinmay S.; Lermusiaux, Pierre F. J.; Haley, Patrick J.; Mirabito, Chris; Wang, Dayang; Adams, E. Eric; Ouillon, Raphael; Breugem, Alexander; Decrop, Boudewijn; Lanckriet, Thijs; Supekar, Rohit B.; Rzeznik, Andrew J.; Gartman, Amy; Ju, Se-Jong
Alternative Author(s)
주세종
Publication Year
2021-12
Abstract
Deep-sea polymetallic nodule mining research activity has substantially increased in recent years, but the expected level of environmental impact is still being established. One environmental concern is the discharge of a sediment plume into the midwater column. We performed a dedicated field study using sediment from the Clarion Clipperton Fracture Zone. The plume was monitored and tracked using both established and novel instrumentation, including acoustic and turbulence measurements. Our field studies reveal that modeling can reliably predict the properties of a midwater plume in the vicinity of the discharge and that sediment aggregation effects are not significant. The plume model is used to drive a numerical simulation of a commercial-scale operation in the Clarion Clipperton Fracture Zone. Key takeaways are that the scale of impact of the plume is notably influenced by the values of environmentally acceptable threshold levels, the quantity of discharged sediment, and the turbulent diffusivity in the Clarion Clipperton Fracture Zone.
ISSN
2662-4435
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41531
DOI
10.1038/s43247-021-00213-8
Bibliographic Citation
Communications Earth & Environment, v.2, no.1, 2021
Publisher
SPRINGERNATURE
Type
Article
Language
English
Publisher
SPRINGERNATURE
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