| 降雨作用下坡面侵蚀的水动力机理 |
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| 引用本文： | 吴永,何思明,李新坡.降雨作用下坡面侵蚀的水动力机理[J].生态环境,2008,17(6). |
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| 作者姓名： | 吴永 何思明 李新坡 |
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| 作者单位： | 1. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041;中国科学院研究生院,北京,100039
2. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041 |
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| 基金项目： | 国家自然科学基金项目
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交通部西部科技项目
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| 摘 要： | 降雨作用下的坡面侵蚀不仅导致严重的水土流失,同时也可能诱发严重的重力地质灾害如滑坡、泥石流等.研究其发生发展的机理以及内部理论规律对减灾防灾具有至关重要的作用.文章以水动力学公式为基础,从坡面颗粒侵蚀的水分环境角度入手,分析了浸泡状态下松散颗粒和固定颗粒的侵蚀机理,揭示降雨作用下坡面水流与坡面颗粒间的相互作用关系,并给出各类型侵蚀发生所对应的临界降雨强度.最后,通过实例计算验证了理论的合理性.
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| 关 键 词： | 降雨 坡面水流 颗粒侵蚀 临界降雨强度 |
The hydrodynamic mechanism of slope erosion under rainfall |
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| Wu Yong,He Siming,Li Xinpo.The hydrodynamic mechanism of slope erosion under rainfall[J].Ecology and Environmnet,2008,17(6). |
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| Authors: | Wu Yong He Siming Li Xinpo |
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| Institution: | Wu Yong1,2,He Siming1,Li Xinpo1 1. Institute of Mountain Hazards , Environment,Chinese Academy of Sciences,Chengdu,Sichuan 610041,China,2. Graduate School of the Chinese Academy of Sciences,Beijing 10039 |
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| Abstract: | The slope erosion occurring in rainfall not only causes the serious soil erosion, but also the heavily gravity disaster such as landslides and debris flows. So study the internal mechanism of the erosion become very important in disaster reduction and prevention project. In article, based on the formula of water dynamics, taken the point of water environment on slope surface, the erosion mechanism of slope particles has been studied. Then by analyzing the relationship between overland flow and slope erosion... |
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| Keywords: | rainfall slope flow particles erosion critical rainfall intensity |
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