作　　者： ; ; ;

机构地区： 中山大学地理科学与规划学院水资源与环境研究中心

出　　处： 《水文》 2005年第3期20-25,57,共7页

摘　　要： 分析了最近45年来北江天然径流量的变化特征,并对其影响因素进行了分析,结果表明:北江天然年径流量具有阶段性特征,1984年后,发生明显变化,持续丰水和持续枯水时段开始变长,年际变化存在21年和11年的周期;锋面低槽形成大暴雨是北江主汛期径流量迅速增加的主要原因;大罗山、石坑崆是北江的两级迎水坡,其形成的多雨中心圈是北江径流量补充的主要来源;厄尔尼诺现象出现的次年北江年径流量普遍增大,拉尼娜现象出现的当年北江径流量普遍增大;太阳黑子的急剧变化,改变了地球的热力系统,对大气环流产生影响,这是太阳黑子影响流域径流量的一个主要原因。 This paper analyses the characteristics of natural runoff annual variability and the concerned influencing factors in Beijiang River Basin in recent 45 years. It is showed that annual variability of natural runoff has phase characteristics in the river, which has an obvious changing after 1984 that continuing low water and high water periods have become longer. It has 21a and 11a period. Rainstorm caused by frontal surface with low trough is the main causation that natural runoff rise quickly. The mountains of Daluo and Shikengkong are two steps of windward slopes, the rainstorm's center that caused by the two windward slopes is the main source of natural runoff in Beijiang River. Natural runoff rises at large after a year when El Nino appears, and in the year when La Nina appears natural runoff rises too. Changing rapidly of Sunspots has changed the system of the earth energy and influenced circulation of atmosphere, which is a main reason that sunspots impact on natural runoff in the Beijiang River Basin.

关 键 词： 天然径流量 大气环流 厄尔尼诺 太阳黑子 北江

领　　域： [水利工程]