Mapping flood susceptibility in mountainous areas on a national scale in China

The Science of the Total Environment
Gang ZhaoTongbi Tu

Abstract

Mountainous terrain covers nearly half of China and is susceptible to floods, which can lead to substantial losses of human life and property. Historical flooding records from government bulletins and newspapers, the only available information regarding floods that have occurred in some mountainous areas, are valuable for understanding flood disaster mechanisms in these regions. In this study, the flood susceptibility in mountainous regions in China was mapped based on historical flooding records from 1949 to 2000. A Random Forest (RF) model, which can handle large datasets through factor contribution analysis, was chosen to characterize the relationships between flooding occurrences and twelve geographic, meteorological, and hydrological explanatory factors. The results indicate that the RF model can effectively identify flood-prone areas and has advantages over artificial neural network (ANN) and support vector machine (SVM) methods. Among these explanatory factors, the geographic factors (elevation, longitude and drainage density) are the most important predictors of flooding in China's mountainous areas, whereas the hydrological factors (relative elevation and curve number) are the least important. Two independent datasets ...Continue Reading

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Citations

Jun 3, 2020·Risk Analysis : an Official Publication of the Society for Risk Analysis·Chengguang LaiXiaoyan Bai
Sep 6, 2018·The Science of the Total Environment·Sean A WoznickiAnne Neale
Feb 4, 2021·International Journal of Environmental Research and Public Health·Nanda KhoirunisaChih-Yu Liu
Mar 27, 2018·Journal of Environmental Management·Hossein Shafizadeh-MoghadamAtaollah Shirzadi
Jun 9, 2021·Journal of Environmental Management·Ivan MarchesiniFausto Guzzetti
Jun 22, 2021·Journal of Environmental Management·Mahfuzur RahmanAshraf Dewan
May 18, 2019·The Science of the Total Environment·Gang ZhaoLiyang Xu
Jul 23, 2021·Scientific Reports·Soheila PouyanJohn J Clague
Aug 3, 2021·Environmental Pollution·Seyedeh Zeinab ShogrkhodaeiAmanollah Fathnia

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