以1956—2005年降雨、径流与气象资料为基础,应用Mann-Kendall趋势检验、小波分析以及R/S分析等多种方法,探讨了东江流域径流年际变化特征及其对气候变化以及植被覆盖变化的响应。结果表明:①50 a来流域年径流序列变化趋势不明显,存在4 a、7~9 a、11~13 a、16~22 a等4类尺度的周期性变化规律;河源、岭下站径流序列具有较强的状态持续性,博罗站持续性很小。②厄尔尼诺现象出现的当年,东江流域年径流量普遍减少;厄尔尼诺现象出现的次年,年径流量普遍增加。太阳黑子数的急剧变化,与东江径流量的丰、枯也有良好的响应关系。③50 a来,在降雨量呈不显著减少趋势的背景下,河源、岭下站径流仍然呈不显著增加趋势的主要原因是蒸发量下降的缘故,是气候因素和流域植被退化共同作用的结果。 Based on the rainfall, runoff and meteorological data from 1956-2005, this paper discussed the interannual variation characteristics of runoff and its effects on climate change and vegetation cover in the Dongjiang River Basin based on Mann-Kendall trend test, wavelet analysis and R / S analysis. Change in response. The results showed that: (1) The annual variation trend of annual runoff series was not obvious in the past 50 years, and there were periodic variations of four kinds of scales such as 4 a, 7-9 a, 11-13 a, 16-22 a; Has a strong state of continuity, Boluo station continuity is small. In the same year when the El Niño phenomenon occurred, the annual runoff in the Dongjiang River Basin generally decreased. In the following year after the El Niño phenomenon, the annual runoff generally increased. The drastic changes in the number of sunspots have a good response to the abundance and dryness of runoff in the Dongjiang River. (3) In the past 50 years, the runoff of Heyuan and Lingxia stations still showed an insignificant increase trend due to the decrease of evaporation, as a result of the interaction between climatic factors and vegetation degeneration.