STORM SURGE, WAVE, AND INUNDATION SIMULATION IN THE BAY 0F BENGAL

ABSTRACT: Bangladesh's geographical and land characteristics along the coastal area has created the most disastrous country by tropical cyclones originating in the Bay of Bengal and associated with the storm surges. During the past 61 years (1950-2011), India Meteorology Department (IMD) was observed 902 events from deep depression (tropical storm) up to super cyclonic storm (tropical cyclone category 5) with average 5 storms per year. This condition is strengthening storm surge and increasing sea level to the sudden inundation and flooding along the Bangladesh coast. Consequently, the storm surge and sea level rise are the key factor of coastal damage. Therefore, it is critical to estimate the future storm surges in a changing climate for vulnerability study and adaptation strategy. In this study, numerical simulations are performed to validate the storm surge induced by the 1991 Bangladesh cyclone, one of the deadliest cyclone in the Bay of Bengal using an atmosphere-waves-ocean integrated modelling system. Then, further numerical experiments are performed to estimate the future storm surges in 2050 and 2080 and inundation map for Bangladesh's disaster management strategy