粘性泥石流阵性运动对沟床冲淤演变的影响——以云南东川蒋家沟为例

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	粘性泥石流阵性运动对沟床冲淤演变的影响——以云南东川蒋家沟为例
	游勇; 程尊兰
刊名	防灾减灾工程学报
	2005
卷号	25 期号:2 页码:146-151
关键词	粘性泥石流沟床冲淤值阵性流
其他题名	The Influence of Discontinuous Motion of Viscous Debris Flow on Erosion and Deposition of Gully Bed——Study of the case at Jiangjia gully in Dongchuan,Yunnan
通讯作者	游勇
合作状况	其它
中文摘要	粘性泥石流沟床的冲淤具有其特殊的机理，年内及一场泥石流的沟床冲淤主要受泥石流体性质、流型、规模的控制，阵性运动中沟床演变主要反映在残留层厚度的变化。对云南东川蒋家沟进行野外现场泥石流及沟床冲淤的定位观测，应用观测资料对阵性粘性泥石流泥深、流速、拖曳力与沟床冲淤值的关系进行分析，认为在泥深<2．0m，流速<8m／s，流量<1500m^3／s情况下，阵性泥石流运动前后沟床冲淤值与三者没有明显线性关系，沟床冲淤幅度较小．一般在-0．8～1．0m之间。通过分析．求得粘性泥石流沟床冲刷深度极限值的表达式。
英文摘要	T he character ist ics of ero sion and depo sit ion of v isco us debris f low gully bed are different from that of w ater flow or landslide. Gully bed o f viscous debris flow ex ist s w ith special mechanism, i. e. , scouring and silt ing of g ul ly bed is mainly cont rolled by debris f low char acter ist ics, flow ty pe and scale among a year o r o nce. Gully bed chang e during intermit tent f low is mainly embo died by v ar iety o f depth of residual layer. Field observing debris f low at Jiang jia gully in Dongchuan City of Yunnan prov ince and lo cated observing of scouring and silt ing of g ul ly bed w ere made. Gully bed evolut io n of observed sect ion before and after intermit tent f low passing thr oug h is measur ed by supersonic debris f low depth meter. Acco rding to field observed data, the relat io nship is analyzed among depth of viscous debris f low , velocity , drag fo rceand sco uring and sil ting of gully bed; as the debris f low depth is less than 2. 0 m, velocity is less than 8. 0 m/ s , and discharg e is less than 1 500 m3 / s. We can f ind that scouring and silt ing of gully bed do esn′t have obvious nonlinear relationship with abov e-ment ioned three condit ions and scale o f scouring and silt ing of gully bed isn′t large, about between -0. 8m and 1. 0 m. According to the analysis, w e attain the ex pression of gully bed′s max imum scouring depth of viscous debris flow . The equat ion has go od physical meaning and it is correspondent to data in field.
分类号	P642.23
资助信息	国家自然科学基金资助项目(40371016)
语种	中文
公开日期	2010-07-16
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/854]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）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	游勇,程尊兰. 粘性泥石流阵性运动对沟床冲淤演变的影响——以云南东川蒋家沟为例[J]. 防灾减灾工程学报,2005,25(2):146-151.
APA	游勇,&程尊兰.(2005).粘性泥石流阵性运动对沟床冲淤演变的影响——以云南东川蒋家沟为例.防灾减灾工程学报,25(2),146-151.
MLA	游勇,et al."粘性泥石流阵性运动对沟床冲淤演变的影响——以云南东川蒋家沟为例".防灾减灾工程学报 25.2(2005):146-151.