以海河流域为例,基于各区域1956～2000年的天然径流资料,分析了15个三级区径流的年际变化不均匀性、年际变化幅度及年际变化突变性。结果表明,海河流域由南向北径流年际变化不均匀性和变化幅度先增后减、平原区大于山区、南部大于北部,15个三级区天然径流量的突变年份与气候突变具有较好的相关性,人类活动是影响径流突变的重要因素之一。 Taking the Haihe River Basin as an example, based on the natural runoff data from 1956 to 2000 in all regions, the variation of interannual variability, interannual variation and interdecadal variability in 15 tertiary areas were analyzed. The results show that the interannual variation of the runoff from the south to the north in the Haihe River Basin increases first and then decreases, the plain area is larger than the mountainous area, the southern area is larger than the northern area, and the sudden change of natural runoff and climate change in 15 tertiary areas are better The relevance of human activities is one of the important factors that affect the runoff mutation.