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利用闽西地区18个气象站30 a的日降雨资料为基础,计算全省的降雨侵蚀力.并采用统计分析、空间分析和M-K突变分析等方法对闽西地区降雨侵蚀力的时空变化特征进行分析.结果表明:从年降雨侵蚀力来看,降雨侵蚀力的年变化呈上升趋势;从季节变化趋势来看,降雨侵蚀力在夏季和冬季呈上升趋势,而春季和秋季降雨侵蚀力呈下降趋势,但降雨侵蚀力上升或者下降均不显著;闽西地区30 a内降雨侵蚀力变化表现为变率突变,R值年际间变化较大,降雨侵蚀力空间分布不均,总体表现为由西北部向东南部递减.
Based on the daily rainfall data of 18 weather stations in Minxi area, the rainfall erosivity of the province was calculated, and the temporal and spatial variations of rainfall erosivity in western Fujian were analyzed by means of statistical analysis, spatial analysis and MK mutation analysis The results show that from the point of view of annual rainfall erosivity, the annual variation of rainfall erosivity shows an upward trend. According to the seasonal variation trend, the rainfall erosivity tends to increase in summer and winter, while the rainfall erosivity decreases in spring and autumn But no significant increase or decrease of rainfall erosivity. The variation of rainfall erosivity within 30 days in Minxi area showed a sudden change in variability, the variation of R value was larger and the spatial distribution of rainfall erosivity was uneven, and the overall performance was from Northwest to southeast decrease.