蒋家沟泥石流入汇时小江悬移质输沙特征分析
张金山
刊名水土保持研究
2011-12-15
卷号18期号:6页码:37-41
关键词蒋家沟 泥石流 小江 悬移质输沙
其他题名Suspended Load Characteristics of Xiaojiang River in the Scenario of Debris-Flow Afflux from Ravine
通讯作者张金山
合作状况国内
中文摘要以2009年8月4日蒋家沟的一场泥石流入汇小江后泥沙观测资料为基础,分析了蒋家沟泥石流入汇小江后的泥沙输移特征。泥石流为小江直接提供了大量的悬移质泥沙,导致入汇时小江输移的泥沙量剧增,输沙率达到了平时的5倍以上;部分堆积于入汇口的泥石流固体物质也在泥石流结束后受小江水流冲刷再次起动,使小江悬移质输沙率在泥石流结束后呈平稳下降,与蒋家沟呈幂曲线下降形成明显的区别。由于泥石流输入的泥沙中细颗粒更容易被小江水流输移,因此尽管入汇的泥石流泥沙中粗颗粒含量较高,但在小江泥沙中含量增加的却是较细的粉沙、黏土颗粒,小江悬移质的中值粒径与含沙量、输沙率和流量的关系曲线都呈上凸形。
英文摘要The characteristics of sediment flows in the Xiaojiang River was studied when debris flowed into
this river,and the solids transport is systematically investigated.A debris flow occurred on Aug.14,2009,
in the Jiangjia Ravine was observed and the process of the afflux to the Xiaojiang River was also monitored.
With the observation data,the flow of the suspended load in the Xiaojiang River was analyzed after the afflux
of debris-flow.Debris flows usually provide a large number of suspended loads for the Xiaojiang River directly,
which generally leads to the rapid increment of sediment transport in the river.The sediment transport
rate of the suspended loads reached about five times of the normal level.Some of the debris flows deposit at
the mouth of the Jiangjia Ravine and enter the Xiaojiang River by erosion.Thus,the suspended load transport
 rate is observed to decrease steadily rather than the decline like the exponential curve in Jiangjia Ravine.
Moreover,fine sediment of the debris-flow is more likely to be transported in the Xiaojiang River.Therefore,
the amounts of silts and clays increas with the sediment transport rate faster than that of fine sands.As
the result,the relationship curves between the mean particle size,the sediment concentration,the discharge,
and the sediment transport rate are found to be convex.
分类号P642.23
收录类别CSCD
资助信息国家自然科学基金“泥石流入汇主河后泥沙输移规律研究”(40871024)
语种中文
CSCD记录号CSCD:4410929
公开日期2013-01-07
内容类型期刊论文
源URL[http://192.168.143.20:8080/handle/131551/4765]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
张金山. 蒋家沟泥石流入汇时小江悬移质输沙特征分析[J]. 水土保持研究,2011,18(6):37-41.
APA 张金山.(2011).蒋家沟泥石流入汇时小江悬移质输沙特征分析.水土保持研究,18(6),37-41.
MLA 张金山."蒋家沟泥石流入汇时小江悬移质输沙特征分析".水土保持研究 18.6(2011):37-41.
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