( 2 ) the method of time series analysis and the stochastic models are introduced , and the yearly and monthly runoff series stochastic models at the heiyukou gauging station in heihe river are established and checked ( 2 )对水文系列的时间序列分析方法及常用的随机模型进行了阐述，建立了黑河黑峪口站的年、月径流序列生成模型并进行了检验。
