Simulation of Storm Surge Level at a Tidal Channel Due To Cyclone along the Bangladesh Coast
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 3
Abstract
This study was conducted for simulation of storm surge level at a tidal channel due to cyclone along the Bangladesh coast. Bay of Bengal hydrodynamic model (BoB) developed by IWM (Institute of Water Modelling) using MIKE21 was updated with finer mesh resolution at Baleshwar channel. The model was calibrated and validated for water level using the measured data of the year 2017 and 2015 respectively. Moreover, cyclone model of MIKE21 maintained by IWM was calibrated for measured wind speed at several locations for cyclone 1991, cyclone SIDR 2007 and cyclone AILA 2009. These two calibrated models (hydrodynamic and cyclone model) were coupled together and storm surge model was developed for Bangladesh coastline. Finally, this storm surge model was calibrated and validated using the measured storm surge levels for cyclone SIDR 2007 and cyclone AILA 2009. The calibrated and validated storm surge model was further verified with the storm surge levels at several places (Southkhali, Rayenda Bazar and Solombaria) along Baleshwar channel during Cyclone SIDR 2007 measured by Japan Society of Civil Engineers (JSCE) team. Simulated storm surge level of calibrated and validated storm surge model shows a difference of +10.7%, -11.5% and -18.4% at Solombaria, Rayenda Bazar and Southkhali respectively with the measured data of JSCE team for cyclone SIDR 2007. This may happen due to some measurement uncertainties of the JSCE team. Furthermore, the calibrated and validated storm surge model was simulated for five different water level and five different wind speed conditions to see the impacts of water depth and wind speed on storm surge height at Baleshwar estuary. Simulated results were used to establish a relation between cyclone parameters and storm surge height at Baleshwar estuary. An equation was developed for estimating the storm surge height at Baleshwar estuary for a known cyclone, which may help the coastal zone managing authorities for better managing the cyclone challenges.
Authors and Affiliations
Shaikh Nahiduzzaman, Md. Ataur Rahman, Zahirul Haque Khan
Keywords
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- EP ID EP437948
- DOI 10.9790/1684-1503042439.
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