Regional Temporal and Spatial Trends in Drought and Flood Disasters in China and Assessment of Economic Losses in Recent Years
Understanding the temporal and spatial distribution in disasters plays an important role in disaster risk management.The present study aims to explore the long-term trends in drought and floods over China and estimate the economic losses they cause.A peak-over-threshold approach is used to identify flood peaks,and the relationship between the disasters and climate indices is investigated using Poisson regression.The major results are as follows:(1)The northeastern part of China were severely affected by drought disasters(average damaged area was 6.44 million hectares).(2)The northern part of East China and Central China,the upstream of the Yangtze River were severely affected by flood disasters(average damaged area was 3.97 million hectares).(3)In the Yangtze River Basin,there are increasing trends in terms of drought and extreme precipitation,especially upstream of the Yangtze River,accompanied by severe disaster losses.(4)By combining the4 trends in drought and extreme precipitation days with the spatial distribution of damaged areas,the study indicates that the increasing trend in droughts has shifted gradually from north to south,and the increasing trend in extreme precipitation gradually has shifted from south to north.
Damaged area direct economic loss disaster drought extreme precipitation
Jieming Chou Tian Xian Wenjie Dong Yuan Xu
State Key Laboratory of Earth Surface Processes and Resource Ecology,Faculty of Geographical Science,Beijing NormalUniversity,Beijing,China
国内会议
厦门
英文
292-305
2019-06-01（万方平台首次上网日期，不代表论文的发表时间）