Temporal and spatial variations of rainfall erosivity in the northern and southern regions of Qinling mountains from 1960 to 2017

• Published in: Zhejiang da xue xue bao. Journal of Zhejiang University. Sciences edition. Li xue ban Vol. 46; no. 3; pp. 380 - 390
• Main Authors: Lu, Xin, Yin, Shuyan, Gao, Taotao
• Format: Journal Article
• Language: Chinese
• Published: Hangzhou Zhejiang University 01.05.2019; Zhejiang University Press
• Subjects: Annual rainfall; Interpolation; Mountains; Mutation; Pandas; Rain; Rainstorms; Variation; 不同雨量级侵蚀力; 秦岭南北地区; 降雨侵蚀力
• ISSN: 1008-9497
• DOI: 10.3785/j.issn.1008-9497.2019.03.017

Based on the daily rainfall data of 47 meteorological sites in the northern and southern regions of Qinling mountains，the annual average rainfall erosivity of the northern and southern regions of Qinling mountains is calculated following the rainfall erosivity model proposed by ZHANG which was set up on the basis of daily rainfall. The spatio-temporal characteristics of rainfall erosivity of different rainfalls in the study are analyzed by adopting the climate trend rate, inverse distance weight interpolation and Mann-Mendal mutation test. It shows: (1)The annual average rainfall erosivity due to different rainfalls in the concerned area from 1960 to 2017 exhibits a decreasing feature from south to north. (2)The interannual changes of the annual average rainfall erosivity, the erosivity due to rainstorm and heavy rain in the past 58 years shows an increasing trend, which fails to be detected by mutations. The erosivity due to moderate rain shows a decreasing trend. The mutation occurred in 1972, it reached a