水文年水循环属性探讨

根据莱芜河道水文站1956—2016年的历年逐月降水资料,每年最大4个月降水主要出现在汛期4个月,占年降水的75%以上,是流域蓄水既地表水、地下水的主要生长形成上升期,剩余8个月降水不到年降水的1/4,是流域蓄水既地表水、地下水的衰减消耗下降期。月模比系数差积过程线形象地表达了水文年水循环的年周期震荡过程,证明了水文年的水循环是一个相对日历年更为完整的年水循环过程。通过月降水径流回归分析,得出汛期月径流主要影响因素是月降水及前月降水;枯水期月径流主要影响因素是前月经流。也从一个侧面证明了水文年水循环是一个比日历年更为完整的年水文循环过程。据此进行每年12月、1月、2月3个月的径流预测是可行的,为研究水文年水循环规律提供参考。

A RANDOM FUNCTIONAL CENTRAL LIMIT THEOREM FOR PROCESSES OF PRODUCT SUMS OF LINEAR PROCESSES GENERATED BY MARTINGALE DIFFERENCES

A random functional central limit theorem is obtained for processes of partial sums andproduct sums of linear processes generated by non-stationary martingale differences. It devel-ops and improves some corresponding results on processes of partial sums of linear processesgenerated by strictly stationary martingale differences, which can be found in [5].