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    Watermass structure at benthic disturbance site (INDEX area) and anticipated mining effects on hydro-physical properties

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    3_Ocean_Min_Symp_Proc_ISOPE_1999_208.pdf (802.3Kb)
    Date
    1999
    Author
    RameshBabu, V.
    Murty, V.S.N.
    Suryanarayana, A.
    Beena, B.S.
    Niranjan, K,
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    Abstract
    Watermass properties were obtained in the Indian Deep Sea Experiment (INDEX) area during pre- (27 May-8 July 1997) and post- (22 July-5 September, 1997) benthic disturbance periods respectively. Watermass (Temperature-Salinity: T-S) structure was characterised with the presence of North Indian Deep Waters having a salinity maximum of 34.75 psu around 45.7 sigma isopycnal. A near-depth uniformity in temperature and salinity in the abyssal water column was due to Antarctic Bottom Watermass with 45.95 sigma. The light transmission profiles showed very negligible changes (1 to 2%) from pre- to post-disturbance periods suggesting that the bottom waters were not affected by the sediment plumes. The intrusion depths of surface-discharged mining effluents were assessed and the anticipated mining effects in surface layers are discussed.
    URI
    http://drs.nio.org/drs/handle/2264/1829
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