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云南蒋家沟黏性泥石流输沙的涨落特征
Alternative TitleFluctuation of sediment transport by viscous debris flow in Jiangjia Gully
刘道川1,2,3; 葛永刚1,2; 谢云旭1,2; 李泳1,2
Corresponding Author葛永刚
2017
Source Publication泥沙研究
ISSN0468-155X
Volume42Issue:3Pages:67-73
Other Abstract

:间歇性阵流是山区小流域发生的黏性泥石流活动的基本形式,其输沙特性表现出一定的间歇性和涨落特性,其涨落可达均值的2 ~ 4个数量级。利用Hurst指数分析了蒋家沟近50年的数千阵泥石流观测资料,发现间歇性阵流的流量、径流量、输沙量序列的Hurst指数均大于0.5,说明序列具有一定程度的长程关联性。同时,对比阵流序列与洪峰序列,发现泥石流阵流的长程关联性强于洪峰序列。另一方面,输沙量的累积百分比均满足统一的指数分布形式: P(S) = CS - muexp(- S /Sc),其中mu越大意味着序列中输沙量较小的阵次越多; Sc表示的是阵流输沙的涨落情况,即Sc越大,阵流输沙的涨落越大。

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Viscous debris flows usually move by a series of surges in mountain watershed,which transport sediment with temporal intermittency and magnitude fluctuation. In Jiangjia debris-flow gully in Yunnan Province, the discharge of surge fluctuates as high as up to four orders of magnitude within an event of debris flow. The Hurst exponents are used to analyze magnitude fluctuation and size-frequency distribution of sediment discharge data in recent 50 years from Jiangjia Gully. Result shows that the Hurst exponents are much bigger than 0.5, indicating that intermittent surge sequences have long-range correlation. The autocorrelation of intermittent surges is stronger than annual flow peak series. In addition,a distribution can be used to show the accumulated sediment discharge.

Keyword泥石流 阵流输沙 Hurst指数 规模- 频率分布 涨落
Subject AreaTv144
DOI10.16239/j.cnki.0468-155x.2017.03.012
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:6003425
Funding Organization国家自然科学基金项目(41471010、41471011) ; 中国科学院STS项目(KFJ-EW-STS-094)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19035
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院山地灾害与地表过程重点实验室
2.中国科学院-水利部成都山地灾害与环境研究所
3.中国科学院大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
刘道川,葛永刚,谢云旭,等. 云南蒋家沟黏性泥石流输沙的涨落特征[J]. 泥沙研究,2017,42(3):67-73.
APA 刘道川,葛永刚,谢云旭,&李泳.(2017).云南蒋家沟黏性泥石流输沙的涨落特征.泥沙研究,42(3),67-73.
MLA 刘道川,et al."云南蒋家沟黏性泥石流输沙的涨落特征".泥沙研究 42.3(2017):67-73.
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