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    Identification of Msf tide amplification using a network of spatially distributed tide gauges

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    SYMPOL_2007_162.pdf (920.5Kb)
    Date
    2007
    Author
    Joseph, A.
    Mehra, P.
    Sivadas, T.K.
    Desai, R.G.P.
    Srinivas, K.
    Thottam, T.
    Vijayan, P.R.
    Revichandran, C.
    Balachandran, K.K.
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    Abstract
    Attenuation of tidal range (approx. 73%) and amplification of fortnightly Msf tide (approx. 10-fold) in the southern region of Kochi backwaters has been identified based on measurements by a network of spatially distributed rotary transducer based float-driven tide gauges. Hysteresis is within o.8 cm. Linearity is better than 1% beyond 25 cm. Accuracy is better than 1.6% and + or - 0.2% respectively in the range 10-100 cm and 101-200 cm. Field inter-comparison measurements with SBE pressure-based tide gauge yielded linear relationship between the two measurements. It is shown that whereas the generation of Msf tide in the northern estuary is attributable to non-linear interaction between M sub(2) and S sub(2) tides, its amplification in the southern estuary is due to variable bottom frictional effects at fortnightly periodicity.
    URI
    http://drs.nio.org/drs/handle/2264/709
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