Flood Hazard, Vulnerability and Risk Assessment for Different Land Use Classes Using a Flow Model

被引:0
作者
Md Abdullah Al Baky
Muktarun Islam
Supria Paul
机构
[1] University of Melbourne,School of Geography
[2] Sylhet Agricultural University,Department of Geosciences
[3] University of Rhode Island,undefined
来源
Earth Systems and Environment | 2020年 / 4卷
关键词
Flood; Hazard; Vulnerability; Risk; Hydraulic model;
D O I
暂无
中图分类号
学科分类号
摘要
This study is concerned with flood risk that can be assessed by integrating GIS, hydraulic modelling and required field information. A critical point in flood risk assessment is that while flood hazard is the same for a given area in terms of intensity, the risk could be different depending on a set of conditions (flood vulnerability). Clearly, risk is a function of hazard and vulnerability. This study aims to introducing a new approach of assessing flood risk, which successfully addresses this above-mentioned critical issue. The flood risk was assessed from flood hazard and vulnerability indices. Two-dimensional flood flow simulation was performed with Delft3D model to compute floodplain inundation depths for hazard assessment. For the purpose of flood vulnerability assessment, elements at risk and flood damage functions were identified and assessed, respectively. Then, finally flood risk was assessed first by combining replacement values assessed for the elements and then using the depth–damage function. Applying this approach, the study finds that areas with different levels of flood risk do not always increase with the increase in return period of flood. However, inundated areas with different levels of flood depth always increase with the increase in return period of flood. The approach for flood risk assessment adopted in this study successfully addresses the critical point in flood risk study, where flood risk can be varied even after there is no change in flood hazard intensity.
引用
收藏
页码:225 / 244
页数:19
相关论文
共 164 条
[1]  
Afifi Z(2019)Residential flood loss assessment and risk mapping from high-resolution simulation Water 11 751-226
[2]  
Chu H-J(1991)Natural disasters: a framework for research and teaching Disasters 15 209-10606
[3]  
Kuo Y-L(2015)Managing flood flows for crop production risk management with hydraulic and GIS modeling: case study of agricultural areas in Shariatpur Validation of land cover maps in China using a sampling-based labeling approach Remote Sensing 7 10589-324
[4]  
Hsu Y-C(2012)SRTM vegetation removal and hydrodynamic modeling accuracy APCBEE Procedia 1 318-5289
[5]  
Wong H-K(2013)Digital elevation based flood hazard and vulnerability study at various return periods in Sirajganj Sadar Upazila Water Resour Res 49 5276-58
[6]  
Ali MZ(2014)Analysis of flood vulnerability and assessment of the impacts in coastal zones of Bangladesh due to potential sea-level rise Bangladesh Int J Disaster Risk Reduct 10 48-743
[7]  
Alexander D(2012)Flood characteristics of Upper Meghna River Basin, Bangladesh Nat Hazards 61 729-433
[8]  
Bai Y(2010)Development of cyclone hazard maps with effect of climate change scenario for Barguna Sadar Upazila Int J Model Simul 30 428-359
[9]  
Feng M(2014)A review of flood management considering the impacts of climate change Bangladesh Int J Surf Groundwater Manag 01 6-51
[10]  
Jiang H(2007)Water management in Bangladesh: an analytical review Water Int 32 342-233