摘要
基于澧水中上游三个控制水文站多年实测径流资料,从年内分配和年际变化两方面分析了澧水中上游径流变化特征。结果表明:澧水中上游径流年内分配较集中,各年代径流年内分配不均性变化平稳;年径流总体呈下降趋势,其中4、11、12月径流下降趋势明显,而2月径流呈明显上升趋势;年径流存在多个时间尺度的周期性变化,其中以4、72、0 a尺度的周期性变化为主。
This paper analyzes the characteristics of the annual distribution and inter annual variation of runoff by using the long-term observation data from the control hydrologic stations in the upper and middle reaches of the Lishui River.The results show that the annual distribution of runoff in the upper and middle reaches of the Lishui River is more concentrative and the non-uniformity of annual distribution changes smoothly in different decades;the variation of runoff has taken on a downward trend in general years;runoff in April,November and December declines while in February it rises obviously;the annual runoff time series has multi-time scale features with the periodic changes of 4 a,7 a and 20 a obviously.
出处
《水电能源科学》
北大核心
2010年第9期15-18,124,共5页
Water Resources and Power
基金
高等学校博士学科点专项科研基金资助项目(20090141110024)
