北部湾经济区入海河流径流变化分析

Analysis of Distribution Regulation of River Flow Discharge into Beibu Gulf Economic Region

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 the Nanliu River,Qin River and Fangcheng River for an example,the annual change characteristics of river flow discharge into the Beibu Gulf economic region in Guangxi during 1956-2000 years is analyzed in this paper.The linear trendline method,sliding mean method and Kendall rank correlation method are used to analyze the change trend of annual runoff.The results indicate that the annual runoff change of Nanliu River is most unevenly among the three rivers;the wet water period of three rivers approximately equals the low water period,and the duration times are not long;the Nanliu River flow discharge into the sea appears decrease trend while the Qin River and Fangcheng River flow discharge appear increase trend;however,the change trend of three rivers is not obvious.