地理研究 ›› 1993, Vol. 12 ›› Issue (2): 77-85.doi: 10.11821/yj1993020010

• 研究报告 • 上一篇    下一篇

泥石流危险范围模型实验*

刘希林1, 张松林1, 唐川2, 陈明2   

  1. 1. 中国科学院(水利部)成都山地灾害与环境研究所;
    2. 云南省地理研究所
  • 收稿日期:1992-05-14 修回日期:1992-10-04 出版日期:1993-06-15 发布日期:1993-06-15
  • 基金资助:
    * 国家自然科学基金(49000011);云南省科委应用基础研究基金(90D063)

A PRELIMINARY RESEARCH ON THE MODEL EXPERIMENTS OF THE RISK RANGE OF DEBRIS FAN

Liu Xilin1, Zhang Songlin1, Tang Chuan2, Cheng Ming2   

  1. 1. Institute of Matain Disacte all Envirology, Chinese Aaleny of Sineres;
    2. Yunnin of Geographty
  • Received:1992-05-14 Revised:1992-10-04 Online:1993-06-15 Published:1993-06-15

摘要: 通过在云南东川蒋家沟现场小规模泥石流堆积过程的68回次标准模型实验,本文探讨泥石流最大堆积长度、最大堆积宽度、最大堆积厚度和堆积面积与泥石流供给方式、堆积区坡度、流通区坡度和泥石流容重的相互关系。得出了特定控制参数下,泥石流危险范围的各类计算公式。

关键词: 泥石流, 危险范围, 模型实验

Abstract: By the way of small-scale model experiments of debris flow in the Jiangjia gou,Dongchuan City of Yunnan Province,five groups of 68 times of standard experiments have been conducted,and the results have given the relationships among the maximum length,width,thickness,risk range of debris fan and the supply modes of debris flow (continuous and intermittent supply),gradients of depositional area and flow section as well as unit weights of debris flow.Under the specific experimental parameters,four types of the formulae to calculate the risk range of debris fan are presented.The important conclusions are as follows,1.Under the circumstance of the continuous accumulation of debris flow,the relationships between the maximum length,width and the risk range of debris fan and the total sediment of debris flow are positively related,and can be expressed as the natural logarithmic functions.The relationship between the maximum length of debris fan and the total sediment of debris flow is positively related,too,aad can be expressed as the linear function,2,Under the condition of the intermittent supply of debris flow,the relationships between the maximum leng th,width,risk range of debris fan and a debris flow supply are positive linear funtions,while the relationship between the thickness of debris fan and a debris flow supply is not close.3 The relationships between the maximum length,risk range of debris fan and the gradients of depositional area are positive linear function The relationships between the maximum width,thickness of debris fan and the gradients of depositional arer are negtiye liaear functions.4,No matter how the unit weight and supply of debris flow are,the maximum length,width,thickness and risk range of debris fan all have a stochastic relationship with the gradients of flow section of debris flow,5,The relationships between the maximum length,risk range of debris fan and the unit weight of debris flow are nsgatively related,and can be written as the natural logarithmic functions.The relationship between the maximum thickness of debris fan and the unit weight of debris flow is positively related,and can be written as a linear function,The maximum width of debris fan and the unit weight of debris flow have not a good relationship.

Key words: Debris flow, Risk range, Model experiment