摘要
针对宝鸡市渭河干流林家村站、渭河北岸支流千河千阳站和南岸支流清姜河益门镇站天然径流序列,采用Kendall秩次相关检验、Spearman秩次相关检验分析了其演变趋势性,用R/S法计算了各自的Hurst指数以分析其演变持续性,分析表明三条河流年径流量均存在较为显著的持续下降趋势;通过月径流序列的相空间重构,估算了能够表征水文系统混沌特性的定量指标即月径流序列的饱和关联维数D2和最大Lyapunov指数1λ,计算结果表明三条河流径流系统均存在混沌特性.
The methods of Kendall＇s and Spearman＇s rank verification were used to analyze the variation tendency of the annual runoffs of the Weihe river at Linjiacun gauging station; the Qianhe river at Qianyang gauging station and the Qingjiang river at Yimenzhen gauging station. The method of Rescaled Range Analysis was used to calculate the value of Hurst indices for analyzing their characters of persistence. It was shown that all the annual runoff series have an obviously persistive decreasing tendency. By reconstructing the phase space of the monthly runoff series, the saturated correlation dimension D2 and the max Lyapunov indices λ1 of the three monthly runoff series, which could token the chaos character of the hydrology system, were calculated. These parameters show powerfully the chaos characters of three rivers.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2006年第6期765-770,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家科技部"西部开发"重大项目(2004BA901A13)
关键词
宝鸡市
径流序列
趋势性
持续性
混沌
Baoji city
runoff series
tendency
persistence
chaos
