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| 黄河天然年径流长期突变特征的小波与李氏指数分析 | |
| 引用本文： | 张少文,张学成,王玲,丁晶,金菊良.黄河天然年径流长期突变特征的小波与李氏指数分析[J].水文,2005,25(5):16-18. |
| 作者姓名： | 张少文 张学成 王玲 丁晶 金菊良 |
| 作者单位： | 1. 四川大学,水电学院,四川,成都,610065 2. 黄河水文水资源科学研究所,河南,郑州,450044 3. 合肥工业大学,土木建筑工程学院,合肥,230009 |
| 基金项目： | 国家自然科学重点基金项目（50239050）;国家自然科学重点基金项目（50279023、40271024）. |
| 摘 要： | 基于小波变换与李氏指数（Lipschitz—cxponent）的分析方法，对黄河陕县水文站长期（1470～2000）天然年径流时间序列变化的突变特征进行了探讨。研究显示，小波变换与李氏指数分析方法不仅能将其年径流变化的突变点在时间域上展现出来，而且清晰地给出各种突变类型、强弱及分布。分析也表明其年径流在531年的变化中，共有22次较大的突变，平均24年出现一次，每次突变的类型和影响程度均有所不同；而其在近50年以来发生了4次突变，大约10年左右出现一次突变，且持续时间也较长，与以往相比其突变的频次和影响程度加剧，这对进一步研究黄河径流演变规律具有重要意义。 |
| 关 键 词： | 年径流 小波变换 李氏指数 突变特征 黄河 |
| 文章编号： | 1000-0852（2005）05-0006-03 |
| 收稿时间： | 2004-11-05 |
| 修稿时间： | 2004-11-05 |
Analysis of Sudden-Change Characteristics of the Annual Runoff in the Yellow River Based on Wavelet Transformation and Lipschitz-Exponent |
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| ZHANG Shao-wen,ZHANG Xue-cheng,WANG Ling,DING Jing,JIN Ju-liang.Analysis of Sudden-Change Characteristics of the Annual Runoff in the Yellow River Based on Wavelet Transformation and Lipschitz-Exponent[J].Hydrology,2005,25(5):16-18. | |
| Authors: | ZHANG Shao-wen ZHANG Xue-cheng WANG Ling DING Jing JIN Ju-liang |
| Institution: | 1. School of Hydraulic Eng., Sichuau Univ., Chengdu 610065, China; 2. Yellow River Institute of Hydrology and Water Resources, Zhengzhou 610072, China; 3. College of Civil Engineering, Hefei Univ. of Technology, Hefei 230000, China |
| Abstract: | This paper discusses variations in multi-time scales and characteristics of sudden-change, based on the annual runoff time series of 531 years (1470-2000) at Shanxian Hydrometric Station on the Yellow River. The study shows that the variant pro-cess of the sudden-change can be presented in different time scales with wavelet transformation and Lipschitz-exponent, which could clearly demonstrate many kinds of characteristics of the time series: jump, situation of sudden-change, distribution and type of sudden-change. The analysis also display that there are great 22 sudden-changes happened from 1470, of which 4 sudden-changes since 1950 have longer duration and they have greater influence than ever before in the time series. These results will have very important significance for feature research of the Yellow River. |
| Keywords: | annual runoff wavelet transformation Lipschitz-exponent the characteristics of sudden-change the Yellow River |
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