摘要
栾川县历史上曾多次暴发泥石流,以其为研究对象,对其物源特征及启动模式进行分析。分析结果表明:县境内泥石流物源类型丰富,主要包括岩性风化与崩塌、水土流失及冲洪积层的再搬运、沟道泥石流堆积物、沟道内人工耕地、残坡积物质失稳和采矿废渣等;受地质构造、岩性和人类活动的影响,物源丰富区主要位于伊河中上游;按照物源供给对泥石流进行分类,可分为坡面侵蚀型、崩滑型、矿渣型及复合型四种;县境内泥石流物源启动模式可分为沟道冲刷启动模式、坡面冲刷启动模式、坡面崩滑启动模式、耕地溃决启动模式和矿渣溃决启动模式等五类。最后,提出了泥石流的防治建议。研究结果可为当地泥石流防灾减灾提供参考。
In history,debris flows repeatedly occurred in Luanchuan county,therefore this paper tookLuanchuan county as the research object,and analyzed the characteristics of its source and start-upmode.The analysis results show that the material source of debris flow is rich,including weathering andcollapse of lithology,soil erosion,transporting of alluvial-proluvial source,channel debris flow deposits,artificial cultivated lands,residual and slope deposits and dump slag.Because of the geological structure,lithology and human activities,the rich source area mainly located in the middle and upper reaches of YiRiver.Based on supply mode of the material source,the debris flows can be classified into four types,including the slope erosion type,collapse-slide type,slag type and compound type.The start-up mode ofthe material source for the debris flows can be classified into five types,including channel-washingstartingmode,slope-washing-starting mode,slope-slide-starting mode,cultivated land burstingstartingmode and slag bursting-starting mode.Finally,several prevention suggestions were proposed inthis paper.The research results can provide references for the prevention and mitigation of debris flowdisasters.
作者
陈鹏宇
彭祖武
Chen Pengyu;Peng Zuwu(School of Geography and Resources Science,Neijiang Normal University,Neijiang Sichuan 641100,China;Hunan Institute of Geological Survey,Changsha 410000,China)
出处
《科技通报》
北大核心
2017年第9期220-226,共7页
Bulletin of Science and Technology
基金
河南省国土资源厅"两权价款"地质科研项目(2011-622-23)
关键词
栾川县
泥石流
物源
分类
启动模式
Luancuhan county
debris flow
material source
classification
start-up mode
