A CYCLONE INDUCED STORM SURGE FORECASTING MODEL FOR THE COAST OF BANGLADESH WITH APPLICATION TO THE CYCLONE `SIDR'
Publish Year: 1390
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMAC-1-2_001
تاریخ نمایه سازی: 2 اسفند 1401
Abstract:
The coast of Bangladesh has a specialty in terms of high bending and many off- shore islands. Incorporation of the coastline and island boundaries properly in the numerical scheme is essential for accurate estimation of water levels due to surge. For that purpose a numerical scheme consisting of very fine mesh is required along the coastal belt, whereas this is unnecessary away from the coast. In this study, a fine mesh scheme covering the coastal belt and islands has been nested into a coarse mesh scheme covering up to ۱۵ N latitude in the Bay of Bengal. For the existence of so many small and big islands and also for high bending of the coastline along the Meghna estuary, a very fine mesh scheme for the region between Barisal and Chittagong is again nested into the fine mesh scheme. A vertically integrated model is developed in Cartesian coordinate system to solve the shallow water equations using semi- implicit finite difference technique for computing surge associated with storms. The developedsystem is applied on a severe cyclonic storm ’SIDR’ that hit Bangladesh on ۱۵th November, ۲۰۰۷. The computed water levels are found to be in good agreement with those observed.
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Authors
M. Mizanur Rahman
Shahjalal University of Science & Technology, Sylhet ۳۱۱۴, Bangladesh Bangladesh Department of Mathematics
G. Chandra Paul
University of Rajshahi, Rajshahi-۶۲۰۵, Bangladesh Bangladesh Department of Mathematics
A. Hoque
University of Rajshahi, Rajshahi-۶۲۰۵, Bangladesh Bangladesh Department of Mathematics