文章基本信息

标题：Catchment-scale flood hazard mapping and flood vulnerability analysis of residential buildings: The case of Khando River in eastern Nepal
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作者：Saraswati Thapa ; Anup Shrestha ; Suraj Lamichhane 等
期刊名称：Journal of Hydrology: Regional Studies
印刷版ISSN：2214-5818
出版年度：2020
卷号：30
页码：1-12
DOI：10.1016/j.ejrh.2020.100704
出版社：Elsevier B.V.
摘要：Study region This study considers the Khando River (a tributary of Koshi River) in eastern Nepal. Study focus To quantify the hazard and vulnerabilities across one of the frequently flooding catchments, i.e. Khando River, we conducted flood hazard assessment for 20, 50, 100, and 200 years return periods. We coupled flood hazard analysis with vulnerability analysis of the most dominant construction system along the river channel, i.e. wattle and daub houses. Based on the measured inundation depths, we created vulnerability and fragility functions. The flood hazard maps, damage mechanisms due to the 2017 flood, and vulnerability, as well as fragility, curves are reported in this paper. New Hydrological Insights for the Region The flood hazard analysis highlighted that the 2017 flood was equivalent to 20 years return period flood. Flood hazard analysis shows that the variation in the maximum inundation depth is not so wide between 20 and 200 years return periods for the Khando River catchment. Flood vulnerability analysis of residential houses along the riverbank highlighted that the wattle and daub construction system is highly vulnerable even for 20 years return period flood. Thus, the floods equivalent to 50, 100, and 200 years may have detrimental consequences in the future.
关键词：Flood hazard mapping ; Flood vulnerability ; Flood fragility function ; Khando River ; Residential building