岷江上游堵河泥石流特征及危险性判别
文献类型：学位论文
| 作者 | 张金山
|
| 学位类别 | 硕士 |
| 答辩日期 | 2005 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 谢洪 ; 马东涛 |
| 关键词 | 岷江上游 堵河型泥石流 堵河危险度 经验公式 灰色关联度 |
| 其他题名 | The Characteristics and Possibility Assessing of Debris Flow Blocking Main River in the Upper Reach of Mingjiang River |
| 学位专业 | 自然地理学 |
| 中文摘要 | 与一般泥石流相比，堵河型泥石流的危害更大，本论文对堵河型泥石流的特征及其堵河危险性判别方法进行了研究，以期为泥石流灾害的评价、危险度区划等减灾防灾实践提供参考。 论文以岷江上游为研究区，选取了堵河型泥石流沟4条、堵塞型和不堵河型泥石流沟各2条作为样本进行较深入的分析和总结，得到如下主要成果： （1）在详细分析和比较8条样本泥石流的流域特征、一次有代表性的泥石流过程的泥石流流体特征及沟口处主河特征的基础上，结合专家问卷调查的结果，同时考虑数据取得的难易程度及可靠性，得出了与泥石流堵河关系较为密切的因素及其重要性排序：入汇处主河宽度、泥石流沟沟床比降、泥石流流量、入汇处主河流量、入汇处主河河床比降、泥石流重度及泥石流暴发频率。 （2）根据上述各因素与堵河的关系分析，并参考前人文献，提出了判断泥石流堵河危险性大小的经验公式： R（泥石流堵河危险度）数值越大，数值越大，堵塞程度就越高，一般堵河可能性R在10以上为易于堵河，介于5～10可对主河造成较严重的堵塞，＜5则堵河的可能性很小，多产生轻微堵塞。 （3）运用处理“小样本”、“贫信息”系统的有力工具——灰色关联度法对泥石流堵河危险性大小进行判断，结果显示出与堵河程度最高的日底寨沟灰色关联度越大，该沟泥石流堵河的危险性越大。 |
| 英文摘要 | The harm of the blocking main river type of debris flow is more serious in comparison with the usual debris flow. In order to offering the references to controlling of debris flow disaster, such as the assessment of debris flow and the danger degree of debris flow division, the characteristic of the blocking main river type of debris flow and estimated the danger degree of a blocking main river type debris flow gully are studied in the paper. 4 blocking main river type of debris flow gullies, 2 semi-blocking main river type of debris flow gullies and 2 non-blocking main river type of debris flow gullies at the upper reach of Minjiang River are analyzed. The main results are as follows: (1) Basing on the detailed analyzing and comparing characteristics of 8 samples debris flow basin, a representational fluid characteristics of each debris flow gully and the characteristics of main river where debris flow gully converge, and combining with the experts questionnaire investigation and considering the difficulty and the reliability of the data gained, this paper educed the factors familiar with debris flow blocking main river degree and the sequence of their importance, which are the width of accumulation section of the main river, the gradient of debris flow gully, the discharge of debris flow, the discharge of main river where the debris flow converge，the gradient of main river in blocking section, the unit weight of debris flow and the occurring frequencies of debris flow. (2) According to the relationship between above factors and the blockage of debris flow to the main river, the experiential equation of assessing the possibility in debris flow blocking main river was concluded. Where, R is the possibility of debris flow blocking the main river, P is the frequency of debris flow, Qn and QZ is the discharge of debris flow and main river, Jn and Jz is the gradient of debris flow gully and main river, Kz is the width of the main river where the debris flow converge. A great number of R means more possibility in debris flow blocking main river. Generally, if R>10, the debris flow has the more possible blocking the main river; if 5<R<10, the semi-blocking may be induced; if R<5, the probability of blocking main river is little. (3) By using the grey-correlational method，which is favorable to deal with small samples and indigent information, the probability of debris flow blocking main river was estimated in the paper. |
| 学科主题 | 自然地理学 |
| 语种 | 中文 |
| 公开日期 | 2013-07-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5642]  |
| 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. 岷江上游堵河泥石流特征及危险性判别[D]. 北京. 中国科学院研究生院. 2005. |
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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