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蒋家沟泥石流沟道年际冲淤变化特征分析
Alternative TitleInter-annual Variation of the Morphology of Debris Flow Channel in Jiangjia Gully
魏丽1,2,3; 胡凯衡1,2; 黎晓宇1,2; 颜春达4
Corresponding Author胡凯衡
2017
Source Publication长江科学院院报
ISSN1001-5485
Volume33Issue:9Pages:57-62
Other Abstract

为了分析泥石流对沟道冲淤的累积影响效应,根据蒋家沟 19992014 年泥石流沟道断面测量数据对沟道年际冲淤变化特征及影响因素进行了分析结果表明: 蒋家沟泥石流沟道断面形态变化主要表现为断面展宽面淤积抬高或冲刷降低; 沟道宽度变化主要发生于 19992009 年, 2009 年后沟道宽度相对稳定, 沟道冲淤速率逐渐减缓; 沟道整体纵剖面曲线呈现下凹型,下凹度不断减小,2009 年后下凹度在1.1左右波动, 纵剖面整体比降不断增大,2009 年后比降增加速率减缓; 泥石流输沙规模减小泥深及流速减小支沟泥石流汇入沟道下游排导工程是影响蒋家沟泥石流沟道冲淤的主要因素研究成果可为泥石流流通及堆积区的防治提供参考

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In the aim of investigating the cumulative effect of debris flow on channel morphologywe analyzed the variations and influential factors of erosion and deposition in Jiangjia Gully according to sectional measurements from 1999 to 2014. Results revealed that the channel width increased  continuously and the sectional height elevated or
decreased depending on the erosion or deposition of channel. The channel width increased mainly from 1999 to
2009and then remained stable after 2009 when erosion or deposition intensity decreased. Moreoverthe curve of
longitudinal profile of channel was concaveand the concavity index decreased graduallyfluctuating around 1.1 after 2009. The gradient of channel profile increased graduallybut the increment alleviated after 2009. Decreases inthe sediment dischargedepth and velocity of debris flowand debris flow afflux from tributaryas well as debrisflow drainage project in the downstream were dominant factors influencing the channel morphology

Keyword蒋家沟泥石流 沟道年际冲淤 下凹度 比降 冲淤速率
Subject AreaP642.23
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:6069824
Funding Organization国家自然科学基金面上项目(41371039) ; 国家重点基础研究发展计划项目(2015CB452704) ; 中国科学院山地灾害与地表过程重点实验室自主支持项目(Y3L1340340)
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20701
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
4.云南省昆明市东川区地质灾害防治中心
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
魏丽,胡凯衡,黎晓宇,等. 蒋家沟泥石流沟道年际冲淤变化特征分析[J]. 长江科学院院报,2017,33(9):57-62.
APA 魏丽,胡凯衡,黎晓宇,&颜春达.(2017).蒋家沟泥石流沟道年际冲淤变化特征分析.长江科学院院报,33(9),57-62.
MLA 魏丽,et al."蒋家沟泥石流沟道年际冲淤变化特征分析".长江科学院院报 33.9(2017):57-62.
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