Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8884861 | Estuarine, Coastal and Shelf Science | 2018 | 41 Pages |
Abstract
The study reports role and dependence of continental shelf geometry on the non-linear interaction of storm surges, tides, and wind waves. As a case study, the shelf geometry representing the west coast of India is considered and numerical simulations are executed using the standard representation of a tropical cyclone. The idealized experiments assume the west coast of India as a straight coastline with varying continental shelf width ranging from 35Â km in the south to 330Â km in the north. For the experiments, ADCIRC model in standalone mode and coupled ADCIRC+SWAN are used by considering 13 idealized cyclone tracks covering the study domain. It is noticed that an amplification of peak storm surge of â¼12Â cm for every 10Â km increase in the shelf width. During different phases of the tide, the surge-wave interaction modifies the water level elevation and its occurrence as the tidal range increases towards north. The interaction of tides on surges and wind waves is observed maximum at low-tide and minimum at flood tide over the wide shelf regions. In general, the non-linear interaction is found to be 15%-20% for any cyclone track or tidal phase. The wave setup caused by wind waves is marginally varies with change of amplitude and phase of the tide, however, its profile is significantly modified, particularly over the wider shelf widths.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Jismy Poulose, A.D. Rao, Prasad K. Bhaskaran,