A CYCLONE INDUCED STORM SURGE FORECASTING MODEL FOR THE COAST OF BANGLADESH WITH APPLICATION TO THE CYCLONE `SIDR'

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  • M. Mizanur Rahman1,
  • G. Chandra Paul2,
  • A. Hoque2,
  1. Shahjalal University of Science & Technology, Sylhet 3114, Bangladesh Bangladesh Department of Mathematics
  2. University of Rajshahi, Rajshahi-6205, Bangladesh Bangladesh Department of Mathematics

Revised: 12-04-2016

Accepted: 12-04-2016

Published in Issue 21-03-2011

How to Cite

Mizanur Rahman, M., Chandra Paul, G., & Hoque, A. (2011). A CYCLONE INDUCED STORM SURGE FORECASTING MODEL FOR THE COAST OF BANGLADESH WITH APPLICATION TO THE CYCLONE `SIDR’. International Journal of Mathematical Modelling & Computations, 1(2), 77-86. http://oiccpress.com/ijm2c/article/view/11037

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 15 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 15th November, 2007. The computed water levels are found to be in good agreement with those observed.
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