摘要
在气候变化与人类活动双重影响下。河川径流的年内分配特征随着发生变化。本文根据白龙江上游4个站点的实测月径流量资料，分析了年内分配不均匀性，集中程度与变化幅度等指标。结果表明：在1965～1969年、1971～1984年和2002～2006年，径流年内分配不均匀性较强：白龙江上游集中度较小。集中度随时间的增加均呈现降低趋势。流域自上游向下游，在不同年代集中期均表现为逐渐缩短的变化趋势。Cm、Cm-max和AR随时间增加而减小，Cm-man刊。随时间增加而增大。总体上看，随着时间的推移，白龙江上游径流年内分配不均匀性越来越低，逐渐由不均匀向相对均匀转变。
With the influence of climate change and human activities, annual distribution of stream flow has been changed. Based on mean monthly runoff of the 4 stations in the upper Bailongjiang River, in this paper, 3 indexes including non-uniformity, concentration and amplitude of variation of annual runoff distribution were analyzed. The results show that non-uniformity of annual runoff distribution is strong during 1965-1969, 1971-1984 and 2002-2006. The concentration ratio is small and it significantly reduce as time goes by in the upper Bailongjiang River. From upstream to downstream, the concentration period is gradual shortening in different years. Cm, Cmax and AR decrease as time going, while Cm-min increase with the time passing. Overall, non-uniformity of annual runoff distribution becomes lower and lower, which gradually transform from non-uniformity to homogeneity in process of time in the upper Bailongjiang River.
出处
《水文》
CSCD
北大核心
2012年第4期82-87,共6页
Journal of China Hydrology
基金
国家科技支撑计划课题(2011BAK12B05)
关键词
白龙江
径流
年内分配
Bailongjiang River
runoff
annual distribution
