Comparison of Present-day and End-Century Multi-hazard Maps for Bangladesh Coast

Momtaz Jahan, Rubaiya Kabir, Arif Chowdhury
Institute of Water and Flood Management, Bangladesh University of Engineering and Technology
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The geographical location, land characteristics, low elevation from the sea, extremely complicated estuarine network, high population density, high levels of poverty, and overwhelming dependence on nature, its resources and services render Bangladesh coastal region as one of the most vulnerable zone to the impacts of climate change and sea level rise. The dominant hazards for Bangladesh coast are cyclonic storm surge, fluvio-tidal flood, salinity intrusion and river bank erosion. The present-day (PD) hazards of coastal inundation from storm surge & fluvio-tidal flooding, river erosion and salinity intrusion has already initiated large scale migration from this region. Due to climate change and sea level rise by the end of century, we still do not know how coastal hazards from storm surge & fluvio-tidal flooding, river erosion and salinity intrusion will affect this region. To understand the future threads due to climate change sea level rise, future hazard conditions by the end of twenty-first century are assessed by constructing Multi-hazard map of future scenario. A comparison of present-day Multi-Hazard map is made with the end-century (EC) Multi-Hazard map. This also gives an indication of future climate-driven hotspots for the region