Spatiotemporal Evolution of Waterlogging Events in Eastern China from 1961 to 2016

作     者：KONG Feng 

作者机构：School of Public Policy & ManagementTsinghua University Center for Crisis Management ResearchTsinghua University Center for Social Risk Assessment in ChinaTsinghua University 

出 版 物：《Journal of Landscape Research》 (景观研究（英文版）)

年 卷 期：2019年第11卷第4期

页      面：64-72,77页

学科分类：08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Sponsored by the National Natural Science Fund(41801064,71790611) China Postdoctoral Science Foundation(2019 T120114,2019M650756) the Central Asian Atmospheric Science Research Fund(CAAS201804) 

主　　题：Waterlogging event Spatiotemporal pattern Mann-Kendall (MK) test Ensemble empirical mode decomposition (EEMD) Wavelet analysis Climate change 

摘      要：In this study, based on the data on the frequency of waterlogging events and the number of waterlogging days of 1,638 stations from 1961 to 2016, a variety of mathematical statistics methods were used to analyze the spatiotemporal evolution of waterlogging events in eastern China. The results showed that:① In terms of time, the annual frequency of waterlogging events and the number of waterlogging days in eastern China in 1961–2016 showed an increasing trend despite of fluctuations. In the interdecadal changes, the highest frequency of waterlogging events and the greatest number of waterlogging days occurred in the 1990s, and from the 1960s to the 1980s, the frequency of waterlogging events and the number of waterlogging days in eastern China showed a decreasing trend. There were 6-year and 30-year periodic variations in the frequency of waterlogging events and the number of waterlogging days in eastern China, and mutations occurred in 1991.② In terms of space, from 1961 to 2016, the areas with high frequency of waterlogging events in various years in eastern China were mainly South China, western and southern Yunnan, northern Jiangsu, southern Zhejiang, northern Fujian, junction areas between Hunan and Chongqing, northern Sichuan, and eastern Liaoning.③ In the spatial distribution of change trends and fluctuation characteristics, the frequency of waterlogging events and the number of waterlogging days in eastern China increased significantly in the southeastern coastal areas from 1961 to 2016, and the fluctuations of the frequency of waterlogging events and the number of waterlogging days in eastern China from 1961 to 2016 presented a spatial variation pattern of low in the southwest and high in the northwest.