In this paper, the characteristics and tendency of annual runoff changes of Naolihe River are analyzed, which is regarded as a typical marshy river in Sanjiang plain.

• 在分析三江平原典型沼泽性河流挠力河径流演变特征及趋势的基础上,应用灰色关联分析和径向基函数网络等方法,探讨了引起径流量减少和发生突变的原因。