云南东川蒋家沟宽级配砾石土原位渗透试验初步研究
文献类型：期刊论文
| 作者 | 陈晓清 ; 崔鹏; 王道杰
|
| 刊名 | 山地学报
 |
| 出版日期 | 2006 |
| 卷号 | 24期号:B10页码:190-197 |
| 关键词 | 泥石流 宽级配砾石土 原位 渗透试验 |
| 其他题名 | Infiltration Experiment of W ide·graded Gravel |
| 通讯作者 | 陈晓清 |
| 中文摘要 | 土体的渗透试验是研究滑坡转化泥石流起动过程和机理的重要研究手段。选择泥石流典型流域——云南东川蒋家沟的泥石流源地土体和堆积土体进行原位土体渗透试验。由于宽级配砾石土的与众不同的特征，表现出特殊的渗透特性。通过试验发现：1．泥石流源地土体的渗透特性的原位渗透系数依次由大到小顺序为林地→耕地→灌丛→荒地→滑坡前缘；2．有表层的堆积土体的渗透性比去除了表土层的渗透性小得多；3．堆积土体的侧渗性很大。结合蒋家沟径流与人工降雨实验，发现在宽级配砾石土体中渗流出的浑水中有许多细颗粒土体，可以认为宽级配砾石土体的渗流不同于一般的渗透，其伴随有细颗粒土体的运移，随时间发展土体渗透性在空间上和时间上都在不断变化。 |
| 英文摘要 | By using Micaps 1 °× 1° object analysis data, physical quantity fields, precipitation data and Doppler radar echo data, the flash blood and rainstorm in west Yunnan on June 26,2005 is analyzed. The results show that the flash blood and rainstorm take place to the South of the convergence field between two Anticyclones and in the south-west jet of the north of the subtropical high. The south-west jet on the north of the subtropical high brings enough water vapor and the bias north wind on the east of Tibetan high leads cold air to move to the south. Water vapor will converge, ascend and condense to produce heavy precipitation which causing flash flood disaster. Strong convergence at mesosphere and low level and strong divergence at upper level may form strong pumping and in- ascending motion between two Anticyclone to result in convective development to produce flash blood and rainstorm. The south-west jet of the subtropical high high energy, high moisture and instability to increase not only supplies water vapor continuously, but also supplies ascending disaster. The moisture flux increase causing humidity increase produce flash blood and rainstormtoo. In the meantime, the w motion to produce rainstorm and cause flash blood at mesosphere results in convective development to ater vapor convergence is advantaged to water vapor accumulation and congregation. When the convergence field moves to the southeast, cold air invading and strong disturbance make water vapor condense and then arouse flash blood and rainstorm . So the flash blood and rainstorm take place in the phase of the strong water vapor convergence. On the Dopplar radar velocity field ,The flash blood and rainstormlocate to the frontage of the convergence line between two Anticyclone and take place the phase during which wind veers along with altitude, the south-west jet exists at the mesosphere and low level and circulation converges. |
| 分类号 | P642．2 |
| 资助信息 | 国家自然基金(40501008)和国家杰出青年科学基金(40025103) |
| 语种 | 中文 |
| 公开日期 | 2010-07-19 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/917]  |
| 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 | 陈晓清,崔鹏,王道杰. 云南东川蒋家沟宽级配砾石土原位渗透试验初步研究[J]. 山地学报,2006,24(B10):190-197. |
| APA | 陈晓清,崔鹏,&王道杰.(2006).云南东川蒋家沟宽级配砾石土原位渗透试验初步研究.山地学报,24(B10),190-197. |
| MLA | 陈晓清,et al."云南东川蒋家沟宽级配砾石土原位渗透试验初步研究".山地学报 24.B10(2006):190-197. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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