| 河流形态的分维及与洪水关系的探讨--以长江中下游为例 |
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| 引用本文： | 马宗伟,许有鹏,李嘉峻. 河流形态的分维及与洪水关系的探讨--以长江中下游为例[J]. 水科学进展, 2005, 16(4): 530-534 |
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| 作者姓名： | 马宗伟 许有鹏 李嘉峻 |
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| 作者单位： | 南京大学城市与资源学系,江苏,南京,210093;南京大学城市与资源学系,江苏,南京,210093;南京大学城市与资源学系,江苏,南京,210093 |
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| 摘 要： | 河流水系形态特征可以通过河流的分形特征来反映,分形维数则是河流分形特征的量化表示,其与河流洪水之间存在着一定的关系。以长江中下游为例,利用网格覆盖法计算出长江中下游河流分维,分析了长江中下游河流的分形特性,并在此基础上结合长江中下游洪水分析不同水系特征下洪水的特点。研究结果表明,一般来说河道分维越大、河网分维越小,洪水发生可能性则越高。
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| 关 键 词： | 河流形态 分形维数 洪水 长江中下游 |
| 文章编号： | 1001-6791(2005)04-0530-05 |
| 收稿时间： | 2004-04-12 |
| 修稿时间： | 2004-04-12 |
River fractal dimension and the relationship between river fractal dimension and river flood: Case study in the middle and lower course of the Yangtze River |
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| MA Zong-wei,XU You-peng,LI Jia-jun. River fractal dimension and the relationship between river fractal dimension and river flood: Case study in the middle and lower course of the Yangtze River[J]. Advances in Water Science, 2005, 16(4): 530-534 |
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| Authors: | MA Zong-wei XU You-peng LI Jia-jun |
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| Affiliation: | Department of Urban and Resources Sciences, Nanjing University, Nanjing 210093, China |
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| Abstract: | The river fractal features can reflect the features of river systems, and the fractal dimension is an important variable that can reflect the fractal features.So there is certain relation between the river fractal dimensions and the river floods.By taking the middle and lower courses of the Yangtze River as an example, this paper calculates its fractal dimensions and ana- lyzes its fractal features by grid-covered analysis, and tries to indicate the relationship between the river fractal dimensions and the river floods through the analysis.The results show that, the higher the river course fractal dimension, the lower the river network fractal dimension, the higher the possibility that flood-happens. |
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| Keywords: | river fractal fractal dimension flood middle and lower course of the Yangtze River |
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