IMHE OpenIR  > 山地灾害与地表过程重点实验室
安宁河上游冷渍沟泥石流特征及其发展趋势
Alternative TitleCHARACTERISTICS AND DEVELOPMENT TRENDS OF DEBRIS FLOWS OF LENGZI GULLY IN THE UPPER ANNING RIVER,SOUTHWEST SICHUAN,CHINA
陈兴长1; 游勇2; 陈晓清2; 柳金峰2; 黄凯2
Corresponding Author游勇
2012
Source Publication长江流域资源与环境
ISSN1004-8227
Volume21Issue:1Pages:122-128
Other Abstract冷渍沟是安宁河上游左岸的一级支沟,沟内发育了一大型滑坡- 碎屑流,为后续泥石流活动提供充足的松散物质来源。为了研究冷渍沟泥石流的危害特征,在野外调查和实地勘测的基础上,分析了泥石流的形成背景条件及其特 征,探讨了泥石流的发展趋势,提出了相应的泥石流防治对策。研究表明,冷渍沟泥石流属于过渡性(亚粘性)高频大规模泥石流,泥石流成灾速度快,危害严重; 百年一遇的泥石流容重为2.1t/m3,五十年一遇的泥石流容重为2.0t/m3,二十年一遇害泥石流容重为1.9t/m3,相应的峰值流量分别为 127.68、81.71和38.18m3/s。在常态下,冷渍沟泥石流的发生频率和规模会逐渐减小;但如果近期遭遇强震或者暴雨,一旦滑坡失稳堵塞沟 道,将会暴发大规模泥石流,很容易堵断安宁河,对上下游造成严重危害。因此,建议在该流域布设必要的泥石流防治工程;同时加强对沟道两岸和滑坡稳定性监 测,做好泥石流发生的监测预警工作。; Lengzi gully is the first order branch of Anning River.There is a large-size landslide in the gully,which provides debris flows with sufficient loose materials.To study the debris flow hazard characteristics,researches were conducted on the formation conditions and development trend of debris flows in the gully based on the field survey,and the countermeasures for debris flow mitigation were also proposed.Results indicated that the debris flows are characterized by low viscous,high frequency,large-size and severe risks.The densities of debris flows were 2.1 t/m3 of 100-year return period,2.0 t/m3 of 50-year return period and 1.9 t/m3 of 20-year return period and the corresponding peak discharges were 127.68,81.71 and 38.18 m3/s,respectively.In normal situation,the frequencies and scales of debris flows will decrease gradually in Lengzi gully.But if strong earthquake or heavy rain happens in this area,large-size debris flows will occur,which will largely block the main river and cause serious harm to upstream and downstream.Accordingly,we suggest that the debris flow control projects should be laid and stability monitoring and warning system of landslide and both sides’ slopes of the gully should also be conducted in the valley.
Keyword泥石流 流量 堵河 冷渍沟 安宁河上游
Indexed ByCSCD
Language中文
CSCD IDCSCD:4436912
Funding Organization中国科学院知识创新项目群项目(KZCX2-YW-Q03-5-2);国家自然科学基金项目(40971014);西南科大博士基金项目(10zx7129)
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5638
Collection山地灾害与地表过程重点实验室
Affiliation1.西南科技大学环境与资源学院, 绵阳, 四川 621010, 中国
2.中国科学院成都山地灾害与环境研究所, 成都, 四川 610041, 中国
Recommended Citation
GB/T 7714
陈兴长,游勇,陈晓清,等. 安宁河上游冷渍沟泥石流特征及其发展趋势[J]. 长江流域资源与环境,2012,21(1):122-128.
APA 陈兴长,游勇,陈晓清,柳金峰,&黄凯.(2012).安宁河上游冷渍沟泥石流特征及其发展趋势.长江流域资源与环境,21(1),122-128.
MLA 陈兴长,et al."安宁河上游冷渍沟泥石流特征及其发展趋势".长江流域资源与环境 21.1(2012):122-128.
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