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Publications (2)0.7 Total impact

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    S. Neetu, Satish Shetye, P. Chandramohan
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    ABSTRACT: After withdrawal of the Indian Summer Monsoon and until onset of the next monsoon, i.e., roughly during November–May, winds in the coastal regions of India are dominated by sea breeze. It has an impact on the daily cycle of the sea state near the coast. The impact is quite significant when large scale winds are weak. During one such event, 1–15 April 1997, a Datawell directional waverider buoy was deployed in 23 m water depth off Goa, west coast of India. Twenty-minute averaged spectra, collected once every three hours, show that the spectrum of sea-breeze-related ‘wind-seas’ peaked at 0.23 ±0.05 Hz. These wind-seas were well separated from swells of frequencies less than 0.15 Hz. The TMA spectrum (Bouwset al 1985) matched the observed seas spectra very well when the sea-breeze was active and the fetch corresponding to equilibrium spectrum was found to be 77±43 km during such occasions. We emphasize on the diurnal cycle of sea-breeze-related sea off the coast of Goa and write an equation for the energy of the seas as a function of the local wind
    Journal of Earth System Science 04/2006; 115(2):229-234. · 0.70 Impact Factor
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    ABSTRACT: The Mandovi and Zuari estuaries in Goa, India are coastal plain estuaries located between the Sahyadris (Western Ghats) and the Arabian Sea. Each estuary is about 50 km long. On the basis of geometry, they can be divided into two distinct regimes. The first, on the seaward side, is the bay, which is about 10 km (5 km) long in case of the Zuari (Mandovi). The width at the mouth of Zuari is about 5 km; mouth of Mandovi is narrower. The second regime is the channel that connects the bay to the head of each estuary. Each is less than a km wide and narrows in the upstream direction. Owing to their wide mouth and small length, each bay comes under strong influence of the conditions, including wind waves, at the open coast; the channels mark the transition between the bays and the heads of the two estuaries. The annual cycle of salinity and other fields in the estuary have two distinct periods: the wet period during roughly June–September, the time of the Indian Summer Monsoon; and, the dry period from November–May. During the wet period the runoff in the Mandovi and Zuari estuaries is much greater than the volume of the estuaries. The volume of freshwater flowing through the Mandovi exceeds the volume of the estuary by a factor of at least 20. Though this figure is smaller for the Zuari, both estuaries are flushed many times over during the wet period. It is the flushing that determines the variability of fields like salinity during this period.