Naser Ahmed

Jagannath University, Dhaka, Department of Geography and environment, Graduate Student

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Naser Ahmed is a graduate student in the Department of Geography and Environment, Jagannath University. Primarily focused in Geodesy and Surveying, Geoinformatics (GIS) and Remote Sensing based Environmental Hazard Modelling.

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Spatio-Temporal Assessment of Groundwater Potential Zone in the Drought-Prone Area of Bangladesh Using GIS-Based Bivariate Models

Natural Resources Research

Assessing drought vulnerability using geospatial techniques in northwestern part of Bangladesh

Science of The Total Environment

Coastal vulnerability assessment of Meghna estuary of Bangladesh using integrated geospatial techniques

International Journal of Disaster Risk Reduction

Bangladesh is one of the most geomorphologically active countries situated within the World&#... more Bangladesh is one of the most geomorphologically active countries situated within the World&#39;s largest basin of the Ganges-Brahmaputra-Meghna (GBM). The physiographic settings of the southward coastal areas of Bangladesh is completely exposed to the sea posing vulnerability to natural hazards whereas the poor socioeconomic condition tends to intensify the impacts of the vulnerability. In addition to that, the contemporary climate change induced vulnerabilities place the coast of Bangladesh as one of the highly affected areas. Therefore, to combat the vulnerabilities to strengthen the resilience of the coastal communities, spatio-temporal dimension of the vulnerability needs to be understood. The study applied RS and GIS techniques with appropriate methodology along with field and secondary data to constitute coastal vulnerability index (CVI) to identify priority intervention areas along the Meghna estuarine coast of Bangladesh which is the first study on Meghna estuary in this kind. The integrated geospatial techniques have been applied to 2470 grids along the Meghna estuarine coast for each of the 9 parameters to rank in a 1 to 5 vulnerability scale. Finally, the cumulative score of ranks of all the parameters have also been scaled to get CVI which shows significant effectiveness in identifying areas (administrative units) with vulnerability intensity. The authors believe that this CVI can be very important decision support tool for the policy makers to sustainably manage the Meghna estuarine coast.

Tropical cyclone risk assessment using geospatial techniques for the eastern coastal region of Bangladesh

Science of The Total Environment

Editor: Ashantha Goonetilleke Tropical cyclones frequently affect millions of people, damaging pr... more Editor: Ashantha Goonetilleke Tropical cyclones frequently affect millions of people, damaging properties, livelihoods and environments in the coastal region of Bangladesh. The intensity and extent of tropical cyclones and their impacts are likely to increase in the future due to climate change. The eastern coastal region of Bangladesh is one of the most cyclone-affected coastal regions. A comprehensive spatial assessment is therefore essential to produce a risk map by identifying the areas under high cyclone risks to support mitigation strategies. This study aims to develop a comprehensive tropical cyclone risk map using geospatial techniques and to quantify the degree of risk in the eastern coastal region of Bangladesh. In total, 14 spatial criteria under three risk components, namely, vulnerability and exposure, hazard, and mitigation capacity, were assessed. A spatial layer was created for each criterion, and weighting was conducted following the Analytical Hierarchy Process. The individual risk component maps were generated from their indices, and subsequently, the overall risk map was produced by integrating the indices through a weighted overlay approach. Results demonstrate that the very-high risk zone covered 9% of the study area, whereas the high-risk zone covered 27%. Specifically, the southwestern (Sandwip and Sonagazi), western (Patiya, Kutubdia, Maheshkhali, Chakaria, Cox&#39;s Bazar and Chittagong Sadar) and southwestern (Teknaf) regions of the study site are likely to be under a high risk of tropical cyclone impacts. Low and very-low hazard zones constitute 11% and 28% of the study area, respectively, and most of these areas are located inland. The results of this study can be used by the concerned authorities to develop and apply effective cyclone impact mitigation plans and strategies.

Cyclone vulnerability assessment of the western coast of Bangladesh

Geomatics, Natural Hazards and Risk

Coastal Bangladesh is one of the hotspots of tropical cyclone's landfall in South Asia. A spatial... more Coastal Bangladesh is one of the hotspots of tropical cyclone's landfall in South Asia. A spatial vulnerability assessment is required to formulate disaster risk reduction strategies. This study develops a comprehensive tropical cyclone vulnerability mapping approach by applying Fuzzy Analytical Hierarchy Process (FAHP) and geospatial techniques and examines the spatial distribution of tropical cyclone vulnerability in the western coastal region of Bangladesh. We have selected 18 spatial criteria under the physical, social, and mitigation capacity categories as the components of vulnerability. Results indicate that the southern and southeastern peripheral areas exhibit higher vulnerability to tropical cyclones since these areas comprise low elevation, gentle slope, closeness to the sea, a high number of historical cyclone tracks, vulnerable land cover classes (settlements and crops land), and poor socioeconomic structures. These areas cover most of the Barguna, Khulna, Bagerhat, Jhalokati, and southern parts of Satkhira, and Pirojpur districts. The existing mitigation capacity measures, for example, the construction of cyclone shelters, embankments, road networks, and effective warning systems in these areas are not adequate levels. The findings would be useful for policymakers and local authorities in formulating appropriate cyclone risk mitigation plans in coastal Bangladesh.

Naser Ahmed

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