摘要
以桂林市青狮潭水库(大型)和金陵水库(中型)为研究对象,基于1958—1990年入库总径流的月流量资料,利用数字滤波技术对径流量进行基流分割,得到地表径流(直接径流)量和基流量。采用极值比和变差系数分析了地表径流和基流的年际变化特征,利用线性趋势线法和Kendall秩次相关法分析了地表径流和基流的变化趋势。结果表明:两个水库的入库总径流量均呈下降趋势而变化趋势不显著,地表径流呈上升趋势且变化不显著,基流量呈下降趋势,其中青狮潭水库的基流下降趋势不显著,而金陵水库的基流下降趋势显著。
The change characteristics of inflow runoff in Qingshitan and Jinling reservoir are studied based on the flow data during 1958 - 1990. Digital filter technology is used in baseflow separation for inflow runoff. Then annual change characteristics of surface runoff and baseflow are analyzed with extreme ratio and coefficient of variation. Linear tendency linear method and Kendall rank correlation method are used to investigate the change trend of surface runoff and baseflow. Annual change of inflow runoff of the two reservoirs shows decrease trends, and not obvious decrease trends. The surface runoff of the two reservoirs tends to increase, but the not obvious change tendency. The baseflow of the two reservoirs shows decrease trends. The decrease trend of baseflow of Qingshitan reservoir is not obvious, but obvious for Jinling reservoir.
出处
《桂林理工大学学报》
CAS
北大核心
2013年第3期438-442,共5页
Journal of Guilin University of Technology
基金
国家自然科学基金项目(51009031)
广西自然科学基金项目(2013GXNSFBA019228)
水资源与水电工程科学国家重点实验室开放基金项目(2010B069)
关键词
入库径流
地表径流
基流
数字滤波
inflow runoff
surface runoff
baseflow
digital filter
