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| 作者 | 魏丽 ; 胡凯衡
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| 刊名 | 自然灾害学报
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| 出版日期 | 2014-04
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| 卷号 | 23期号:2页码:53-60 |
| 关键词 | 阵性泥石流
输沙量
颗粒组成
分形
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| 其他题名 | Study on sediment transporting characteristics of intermittent debris flows in Jiangjia Ravine
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| 通讯作者 | 魏丽
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| 中文摘要 |
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阵性运动是粘性泥石流运动的主要形式，以蒋家沟5a中20次具有完整观测资料的典型阵性泥石流作为基础数据，对阵性泥石流输沙量、输沙级配变化进行了初步分析。分析发现阵性泥石流输沙量变化具有两种模式，输沙量峰值一般出现在阵次序列前期或序列中期。不同阵次泥石流颗粒级配曲线具有相似的特征。随着阵流的发展，泥石流细颗粒含量增加，粗颗粒含量不断减少，中值粒径、峰度系数、和质量密度总体均呈减小趋势；出现连续流时，粘粒含量不断增加，质量密度迅速减小，0.01 mm可以作为划分阵性泥石流颗粒的临界分维粒径，大于和小于该粒径的颗粒组成均具有较好的分形特征，其对于泥石流流态具有重要的意义。
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| 英文摘要 |
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Intermittent motion is the most important moving form of viscous debris flows. With field observation data of intermittent debris flow in Jiangjia Ravine, 20 typical intermittent debris flows with whole occurring process were chosen as the basic data to preliminarily analyze the characteristics of debris flow sediment discharge and gradation. The analysis shows that, there are two changing patterns of intermittent debris flow sediment discharge, and the sediment discharge peaks usually appear in early or middle stage. Some similar characteristics exist in sediment particle composition. With the development of intermittent debris flows series, there is an increase in fine particles content and continuous reduction of coarse particles content, while median diameter, bimodality parameter and mass density overall show a decreased trend. When continuous flow appears, the viscous particle content increases continuously and mass density decreases rapidly. Fractal dimension values are calculated, with non-scale range identified as 0.01 mm. The particles greater than and less than the size show evident fractal characteristics, which has important implications for the debris flow pattern.
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| 分类号 | TV142.2
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| 收录类别 | 其他
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| 资助信息 | 中国科学院重点部署项目（KZZD-EW-05-01-03）；中国科学院水利部成都山地灾害与环境研究所青年百人团队资助项目（110900K235） |
| 原文出处 | http://zrzh.iemzzs.com/oa/darticle.aspx?type=view&id=20140208
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| 语种 | 中文
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| 公开日期 | 2014-10-10
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| 源URL | [http://ir.imde.ac.cn/handle/131551/7302]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
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推荐引用方式
GB/T 7714 |
魏丽,胡凯衡. 蒋家沟阵性泥石流输沙规律研究[J]. 自然灾害学报,2014,23(2):53-60.
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| APA |
魏丽,&胡凯衡.(2014).蒋家沟阵性泥石流输沙规律研究.自然灾害学报,23(2),53-60.
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| MLA |
魏丽,et al."蒋家沟阵性泥石流输沙规律研究".自然灾害学报 23.2(2014):53-60.
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