| 三峡蓄水后典型河段分形维数的变化分析 |
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| 引用本文： | 周银军,陈立,欧阳娟,刘金.三峡蓄水后典型河段分形维数的变化分析[J].水科学进展,2010,21(3):299-306. |
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| 作者姓名： | 周银军 陈立 欧阳娟 刘金 |
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| 作者单位： | 1.武汉大学水资源与水电工程科学国家重点实验室, 湖北, 武汉, 430072; |
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| 基金项目： | "十一五"国家科技支撑计划资助项目，国家自然科学基金资助项目 |
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| 摘 要： | 针对三峡工程蓄水后下游河道河床表面形态的变化,采用分形维数对河床表面形态进行量化,并分析河道冲淤调整特点,对河床表面分形维数(BSD)的变化特点及物理意义进行探讨。结果表明,BSD与河床各个剖面形态之间的关系是整体与部分的关系,BSD能全面地反映床面形态的复杂程度。三峡蓄水后,宜昌-虎牙滩和宜都河段BSD明显增大,关洲河段增大幅度较小,而芦家河河段BSD值略有减小,同时,各河段BSD的变化可在一定程度上表征三峡蓄水后下游河道河床综合阻力的调整结果。可通过对各河段演变趋势的分析,来预测其BSD的变化,进而为分析其阻力和水位的变化趋势提供依据。
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| 关 键 词： | 河道 三峡工程 河床表面分形维数 演变 河床综合阻力 |
| 收稿时间： | 2009-07-01 |
Changes in fractal dimensions of representative reaches after the impoundment of Three Gorges Project |
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| ZHOU Yin-jun,CHEN Li,OUYANG Juan,LIU Jin.Changes in fractal dimensions of representative reaches after the impoundment of Three Gorges Project[J].Advances in Water Science,2010,21(3):299-306. |
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| Authors: | ZHOU Yin-jun CHEN Li OUYANG Juan LIU Jin |
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| Institution: | 1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2.Yangtze River Scientific Research Institute, Wuhan 430010, China |
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| Abstract: | The changes in erosion-deposition patterns of downstream river bed surface after the impoundment of Three Gorges Project(TGP) are quantified by the river bed surface fractal dimension(BSD).The changing character and the physical mechanism associated with the changes are also analyzed.The study reveals a whole-part relationship between the BSD and each cross-section.The complexity of river bed surface can be well represented by BSD.After the TGP impoundment,there is a significant increase in BSD along the Hu... |
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| Keywords: | waterways Three Gorges Project(TGP) bed surface fractal dimension river evolution bed friction |
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