大别山黄尾河流域径流演变特征分析

Analysis on the runoff evolution characteristics ofHuangwei River Basin in Dabie Mountain

以大别山黄尾河流域长时间序列的径流资料为基础,利用累积距平法、Cramer突变检验法、小波分析法等揭示了径流的年际年内变化、周期性变化等特性。研究看出径流的多时间尺度结构明显,主要存在34~40年,11~34年和10年以下3类尺度的周期性变化规律,其中10年以下的小尺度周期变化显著,中心尺度在6年左右。径流年内分配不均匀,夏季径流量比例最大,几乎是全年径流量的一半,冬季最小,春季径流量大于秋季径流量。流域受自然、人为干扰等多种因素的综合影响,径流时空变化的随机性、非线性及非平稳性特征显著。

Based on the long time runoff series data of the Huangwei River Basin in Dabie Mountain,using the cumulative departure method,Cramer mutation test method and wavelet analysis method to reveal characters within the year and inter-annual,periodic change characters and so on.The results showed that the multiple time scale structure of runoff was obvious,which mainly existing in three types of scale periodic change law of 34-40 years,11-34 years and less than 10 years,in which the small scale periodic change of less than 10 years was significant,and the central scale was around 6 years.The runoff was unevenly distributed throughout the year,with the largest runoff ratio in summer,which was almost half of the annual runoff,the smallest in winter,and the greater runoff in spring than in autumn.Due to the comprehensive influence of natural disturbance,artificial disturbance and other factors,runoff spatial and temporal variation has significant characteristics of randomness,non-linearity and non-stationarity.