摘要
以湖南酒埠江水库1958-1990年的入库月径流量资料为研究目标,采用数字滤波技术对其入库径流量进行基流分割。地表径流和基流的年际变化特征主要采用极值比和变差系数法,线性趋势线法和Kendall秩次相关法被用来分析地表径流和基流的变化趋势。结果显示,地表径流量比基流量的年际变化剧烈;地表径流呈上升趋势而基流呈下降趋势,地表径流和基流的变化趋势均不显著。
Taking month inflow runoff into Jiubujiang reservoir in Hunan province during 1958-1990 year as the research object, the digital filter technology is used to the baseflow separation for runoff. The annual change characteristics of surface runoff and baseflow is analyzed with the extreme ratio and coefficient of variation, the linear tendency linear method and Kendall rank correlation method are used to study the change trend of surface runoff and baseflow. The results indicate that the annual runoff change of surface runoff is more unevenly; the surface runoff appear an increase trend, but the baseflow appear a decline trend, ＂~he change trend of surface runoff and baseflow is not obvious.
出处
《中国科技信息》
2013年第9期34-34,39,共2页
China Science and Technology Information
关键词
地表径流
基流
数字滤波
surface runoff
baseflow
digital filter technique
