Study on Changes of Rainstorm Days in Different Regions of China in the Recent 50 Years (PAP014338)

Código

PAP014338

Autores

Fei Mao, Sun han, Zhiguo Huo, Youhao E, Dapeng WANG

Tema

Floods in a changing climate

Resumo

Using daily precipitation data of 601 stations from 1961 to 2010 in China, the changes of rainstorm days in different regions of China were analyzed and compared based on Mexican Hat wavelet and mathematical statistics. The main results show that the annual rainstorm days increased during the recent 50 years in most regions of China, and the amounts of increase were significantly greater than that of decrease. The annual rainstorm days increased mainly in the Lower Yangtze-Huaihe areas, the south of the Lower Yangtze River, Guangdong Province, Guangxi Zhuang Nationality Autonomous Region, Hainan Island, etc. In these areas, the risk of meteorological and geological disasters such as flood inundation, mud-rock flow, landslide, etc. were increased. After 2010, the annual rainstorm days and the risk of rainstorm disaster will possibly increase in most regions of China. Some research results in this paper provide important information of climate background for analyzing and evaluating disasters of flood inundation, mud-rock flow, landslides, etc.