水资源与水工程学报2013，Vol.24Issue(3)：38-42,5.
海流兔河近50年来基流变化特征分析
Analysis of base flow variation characteristic in Hailiutu River in past 50 years
摘要
Abstract
Base flow is the main supplement source of stream flow in dry period and especial important to the river in arid and semi-arid area.It plays an important role in maintaining the fragile ecological system in the region.Based on the observed runoff series of Hailiutu river from 1957 to 2007,the paper used recursive digital filter method for base flow separation and investigated the trend of annual and inter -annual variations of base flow and BFI (base flow index).The statistical method of nonparametric Mann-Kendall test was used for analyzing the trend of base flow and BFI.Results showed that base flow holds a larger proportion of the runoff,annual base flow and runoff have a significant descending trend; the annual distribution of runoff is even but the base flow first decreased and then increased; BFI both in annual and inter-annual shows even,has no significant increase or decrease trend.The Regime Shift Index (RSI) method was used to measure sudden change point of the base flow in 1966 and 1986.The runoff occurred sudden change in 1968,1989 and 2001.关键词
基流分割/递归滤波法/基流指数/M-K非参数检验法Key words
base flow separation/recursive digital filter method/base flow index (BFI)/Mann-Kendall test分类
天文与地球科学引用本文复制引用
祖明娟,管仪庆,张丹蓉,沈晓金,李绣红,邵广文..海流兔河近50年来基流变化特征分析[J].水资源与水工程学报,2013,24(3):38-42,5.基金项目
国家自然科学基金资助(51209064) （51209064）
