以南流江、钦江、防城河为例,分析了北部湾经济区1956~2000年入海河流径流量年际变化特征,采用线性趋势线法、滑动平均法、Kendall秩次相关法分析了3条河流年际径流变化趋势。结果表明,南流江入海径流年际变化最剧烈,3条河流丰、枯年份径流基本持平且历时较短,南流江入海年径流量呈减少趋势,钦江和防城河入海年径流量呈增加趋势,但趋势均不显著。 Taking Nanliujiang River, Qinjiang River and Fangcheng River as an example, the interannual variation of runoff in Beibu Gulf Economic Zone from 1956 to 2000 was analyzed. By using the trend line method, the moving average method and the Kendall rank correlation analysis Inter-annual runoff variation trend of three rivers. The results show that the interannual variation of runoff from Nanliujiang River is the most intense. The annual runoff of Nanliujiang River reaches a decreasing trend, and the runoff of Qinjiang River and Fangcheng River into the sea is relatively small. Showing an increasing trend, but the trend is not significant.