| 摘要: |
| 应用非趋势波动分析法,有效消除了数据中的噪声和非平稳信息影响,得到了定量描述河川径流长期演变行为的参数,即标度指数。根据标度指数的变化特性,探讨了河川径流的长程幂律相关及其存在的时间尺度等问题,通过黄河上游贵德水文站径流资料的仿真分析,表明该方法是可行的。 |
| 关键词: 径流序列 非趋势波动分析 标度指数 动力学特性 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目 (50479024);青海省科技厅项目(2004-G-158) |
|
| Study on the kinetic characteristic of the river runoff based on DFA |
|
|
| Abstract: |
| The detrended fluctuation analysis(DFA) method is applied to effectively eliminate noise and possible non-stationary information in the data series and thus the scaling index is gained,which is a parameter to depict the long behavior of the river runoff evolvement quantificationally.According to the change of the parameter,the long range power-law correlation and the time scales of the river runoff are discussed.Through imitative analysis of the real runoff data from Guide hydrological station in the upstream of the Yellow River,the results show that the DFA is feasible. |
| Key words: runoff series,detrended fluctuation analysis,scaling index,kinetic characteristic |
