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    Residence time of pollutants discharged in the Gulf of Kachchh, northwestern Arabian Sea

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    Mar_Pollut_Bull_64_1659a.pdf (1.279Mb)
    Date
    2012
    Author
    Patgaonkar, R.S.
    Vethamony, P.
    Lokesh, K.S.
    Babu, M.T.
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    Abstract
    A 2D Hydrodynamic-Particle Analysis model was applied to the Gulf of Kachchh (GoK) to estimate the residence time of pollutants. The tidal currents in the Gulf have a strong E-W component, which prevents the material in the north being transported towards south. In the regions situated very close to the open boundary, where the GoK waters exchange freely with the northern Arabian Sea, dilution takes place rapidly with the incoming waters and hence, the residence time is on the order of 1 day. Influence of eddies and a dynamic barrier across the Sikka-Mundra section on the residence time is apparent. Eastern GoK shows a relatively large residence time, on the order of 2-4 days, warranting caution while releasing industrial wastes in the northeastern Gulf. The region around location-5 behaves like a bay; the dissolved matter gets trapped in this bay and the residence time increases by 3-4 days.
    URI
    http://drs.nio.org/drs/handle/2264/4141
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