Analysis and Comparing of the Complexity Distributions of Precipitation in Two Typical Regions in Changing Environment, China

2010 International Workshop on Chaos-Fractal Theories and Applications Pub Date : 2010-10-29 DOI:10.1109/IWCFTA.2010.40

Q. Luan, Lixia Chen, Yao Cheng

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引用次数: 2

Abstract

The environment have varied sharply since 1980s in China owing to the influence of climate change and human activities, which makes precipitation process become more and more nonlinear and dynamic and hard to be described. The fractal dimension is a fit index to describe the complexity of the hydrologic series quantitatively and Wavelet Transform is a feasible method for the study of the nonlinear and dynamic process. Using the fractal dimension based on Continuous Wavelet Transform (CWT), the complexity distributions of different precipitation process of which is from 1980 to 2000 in Hand an and the other is from 1980 to 2009 in Qilijie basin, are illuminated respectively in this study. The result indicates that the precipitation process since 1980s in Qilijie basin is more complex than that in Hand an and the fractal dimension of the precipitation in urban area is lager than that in other areas both in two typical regions. This study can provide technical guidance for the research of hydrologic system and reference for water management in the local region.

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中国变化环境下两个典型地区降水复杂性分布的分析与比较

20世纪80年代以来，受气候变化和人类活动的影响，中国的环境发生了剧烈变化，降水过程变得越来越非线性和动态性，难以描述。分形维数是定量描述水文序列复杂性的合适指标，小波变换是研究水文序列非线性动态过程的可行方法。利用基于连续小波变换(CWT)的分形维数，分别阐明了1980 ~ 2000年邯郸和1980 ~ 2009年七里街流域不同降水过程的复杂性分布。结果表明:20世纪80年代以来，七里街流域降水过程比邯郸更为复杂，城区降水分形维数均大于其他地区。该研究可为水文系统研究提供技术指导，为当地水资源管理提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2010 International Workshop on Chaos-Fractal Theories and Applications

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