| 流域演化与泥石流的系统性——以云南东川蒋家沟为例 |
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| 引用本文： | 李泳,胡凯衡,苏凤环,苏鹏程.流域演化与泥石流的系统性——以云南东川蒋家沟为例[J].山地学报,2009,27(4). |
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| 作者姓名： | 李泳 胡凯衡 苏凤环 苏鹏程 |
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| 作者单位： | 中国科学院山地灾害与地表过程重点实验室,四川,成都,610041;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： | 国家自然科学基金资助项目，中科院成都山地所创新项目 |
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| 摘 要： | 以典型的云南东川蒋家沟为例,根据Strahler面积-高程曲线的积分将其分区,揭示了流域的演化差异.证明了泥石流发生在特定的演化区域,并具有特定的物质组成.通过概率模型,定性说明了泥石流在流域的形成和扩张,其结果就表现为间歇性的阵流.阵流的时空特征反过来证明了泥石流的系统性.统计还表明,阵流的流量分布和衰减取决于最大流量;最大流量序列很好继承了作为流域系统行为的动力学特征.最后,可以根据单沟泥石流的过程系统考察区域泥石流活动.泥石流在大尺度水系的分布,从概率过程看,完全等同于泥石流源地小分支在单个流域的分布,而且满足相似的分布特征.
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| 关 键 词： | 流域演化 流域分区 泥石流 概率分布 蒋家沟 |
Debris Flow Viewed from the Basin Evolution——A Case Study of Jiangjia Gulley .Yunnan |
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| LI Yong,HU Kaiheng,SU Fenghuan,SU Pengcheng.Debris Flow Viewed from the Basin Evolution——A Case Study of Jiangjia Gulley .Yunnan[J].Journal of Mountain Research,2009,27(4). |
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| Authors: | LI Yong HU Kaiheng SU Fenghuan SU Pengcheng |
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| Institution: | 1.Key Laboratory of Mountain Hazards and Surface Process;Chinese Academy of Sciences;Chengdu 610041;China;2.Institute of Mountain Hazards and Environment;Chinese Academy of Sciences & Ministry of Water Conservancy;China |
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| Abstract: | Based on the Strahler Hypsometric(Area-Altitude) curve,the Jiagjiagou Gulley of Yunnan is divided into four types of sub-regions,showing that debris flows are likely to develop in the subregions that stay in the special evolutionary episode featured by the hypsometric integral between 0.55 and 0.65.Also favoring debris flow in this subregion is the soil that assumes scaling property in grain size distribution.A simplified hierarchical model is introduced to illustrate the formation and extension of debris f... |
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| Keywords: | valley evolution hypsometric division debris flow probability distribution Jiangjiagou Gully |
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