螺河天然径流量的特征分析

分析了1956～2008年螺河天然径流量的变化特征,并对其影响因素进行了浅析。结果表明:螺河天然年径流量具有阶段性特征,年际变化存在11 a的周期;台风带来的降水对螺河径流量的年内分布不均影响很大;厄尔尼诺现象出现的次年,螺河年径流量普遍增大;太阳黑子的变化,对大气环流产生影响,从而影响了流域的降水,这是太阳黑子影响流域径流量的一个原因。

Analysis on the Natural Runoff Characteristics in Luohe Drainage Basin

The analysis about the change of natural runoff and the possible influencing factor in the Luohe River from 1956 to 2008.It was showed that annual variability of natural runoff had phase characteristic in the river.It has 11a period.The typhoon rain impact the distribution of natural runoff.After a year when El Nino appears natural runoff rises large;changing rapidly of sunspots influencing circulation of atmosphere,is a main reason that sunspots impact on natural runoff of Luohe drainage basin.