Tidal mixing in Dahej creek waters

G.N. Swamy, R.V. Sarma

Abstract



Mixing characteristics of a tidal inlet near Dahej at the mouth of Narmada River, Gujarat, India are examined in terms of tides, currents and bathymetry. The dilution potential of the Dahej Creek waters during a tidal march for a given rate of effluent discharge has been worked out. The allowable duration of discharge of the hypothetical effluent over a tidal cycle ensuring a specified minimum dilution has also been indicated to help optimise the degree of inplant treatment. The results suggested that the practical approach would be to carry out cost analysis based on the available discharge time and the possible inplant treatment for a given effluent output

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