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    Reduction in density of suspended - sediment - laden natural waters

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    Inchoe_1997_2_708.pdf (455.5Kb)
    Date
    1997
    Author
    Joseph, A.
    Desa, E.
    Desa, E.
    Smith, D.
    Peshwe, V.B.
    Vijaykumar, K.
    Desa, J.A.E.
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    Abstract
    Pressure measurements made in various turbid natural waters have led to the inference that the effective depth-mean in-situ density values peff of these waters are less than (approx equal to 2.70%) their static bulk densities and also (approx equal to 0.4% - 4.5%) that of the density of the same water without suspended sediment. Teh values of peff in a given site differed from one tidal cycle to another (approx equal to 1.9%). These values varied slightly (less than 0.8%) from mid-tide to slack water of the same tidal cycle, with peff being lower at mid-tide. It was found that the use of bulk deisity to estimate tidal height gave an under-estimation of tidal range (upto 7%). The under-estimation has been corrected (to within plus or minus 1.5%) with the use of peff parameter. For clear waters there was no observable under-estimation in tidal range. The observations strongly suggest that suspended sediments play a hitherto unknown role in the apparent in-situ density reduction effect seen in turbid natural waters.
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    http://drs.nio.org/drs/handle/2264/2023
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