IMHE OpenIR  > 山地灾害与地表过程重点实验室
泥石流源地坡面土体活动随机性规律实验
Alternative TitleExperiment on Random Law of Slope Soil Movement in the Source Area of Debris Flow
郭晓军1,2; 李泳1; 崔鹏1
Corresponding Author李泳
2014
Source Publication吉林大学学报(地球科学版)
ISSN1671-5888
Volume44Issue:4Pages:1260-1268
Other Abstract

坡面土体的崩塌活动是泥石流形成的初始过程。为了研究降雨条件下该过程中蕴含的随机性,选择典型泥石流源地坡面进行人工降雨实验,观测坡面径流和坡面土体活动特征。结果表明:坡面径流的产生与坡面土体的供给是2个相对独立的过程;坡面产流过程在时间上具有连续性,空间上具有均匀性,规模上具有稳定性;即使是在恒定的降雨强度条件下,泥石流的源地土体活动也表现为一个离散的土体崩塌序列,具有时间上的间歇性、空间上的聚集性、规模上的随机性,且在时间上服从泊松分布,在规模上服从规模-频率的幂率关系;坡面的水土过程是不完全同步的,泥石流的形成依赖于坡面土体补给的时间、空间和规模分布,这也决定了泥石流阵流的多变和流量的涨落。建立基于土体活动特征的随机性补给模型,结合分布式水文模型,是建立科学的泥石流预报模型的有效方法。 
 

;

The runoff yield and slope failures are the source of debris flows in watersheds. The previous study focuses on the deterministic mechanism formation of slope failures for debris flow initiation and hydrological processes for debris flow runoff calculation. This paper aims to reveal and discuss the randomness process of slope failures. Artificial rainfall experiment was conducted on selected typical debris flow source region to observe the movement features of slope runoff and soil body. Results showed that slope failure and runoff formation are two separated processes. Runoff generation was continuous, evenly and stably distributed on slope. Slope failure presented a sequence of soil body collapse with the features of intermittence in time, aggregation in space, and remarkable fluctuation in magnitude. Slope failures time interval fit the Poisson distribution and its magnitude fit the power-law. The soil and water supplies were unsynchronized, the debris flow initiation depend not only on the flood generation, but also on the spatiotemporal characteristics of the slope failure processes, which leads to high variety and fluctuation of debris flows even under the same rainfall condition. This study contributes the debris flow formation and runoff calculation by taking debris flow formation as a randomness and discontinuous process and revealing the spatial characteristics of slope failures.

Keyword泥石流源地 土体活动 产流 泥石流阵流
Subject AreaP642.23
DOI10.13278/j.cnki.jjuese.201404203
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5236559
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18298
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/中国科学院水利部成都山地灾害与环境研究所
2.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
郭晓军,李泳,崔鹏. 泥石流源地坡面土体活动随机性规律实验[J]. 吉林大学学报(地球科学版),2014,44(4):1260-1268.
APA 郭晓军,李泳,&崔鹏.(2014).泥石流源地坡面土体活动随机性规律实验.吉林大学学报(地球科学版),44(4),1260-1268.
MLA 郭晓军,et al."泥石流源地坡面土体活动随机性规律实验".吉林大学学报(地球科学版) 44.4(2014):1260-1268.
Files in This Item:
File Name/Size DocType Version Access License
泥石流源地坡面土体活动随机性规律实验_郭(615KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[郭晓军]'s Articles
[李泳]'s Articles
[崔鹏]'s Articles
Baidu academic
Similar articles in Baidu academic
[郭晓军]'s Articles
[李泳]'s Articles
[崔鹏]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[郭晓军]'s Articles
[李泳]'s Articles
[崔鹏]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 泥石流源地坡面土体活动随机性规律实验_郭晓军.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.