摘要
祁连县牛心山北坡刺疙瘩泥石流,严重威胁沟口附近人民生命财产安全。通过详细勘查,综合分析泥石流的形成条件、发育特征及形成机制;评价动力学特征;运用单沟泥石流危险性评价中灰色关联法,将泥石流规模、频率、流域面积、主沟长度、流域相对高差、流域切割密度和不稳定沟床比作为评价因子,对泥石流危险性进行评价。结果表明:刺疙瘩泥石流泥石流容重1.76t/m^(3),为粘性泥石流;泥石流流速:3.03m/s;泥石流危险度0.47,属于中度危险。
The Cigeda debris flow in the northern slope of the Niuxin Mountain in Qilian is a serious threat to the lives and property of people near the mizoguchi.This paper has a discussion on forming conditions,developmental characteristics,genetic mechanism,dynamic characteristics of this debris flow and makes the assessment for hazard degree of the debris flow by means of grey correlation method for hazard assessment of debris flow in single gully and assessment factors such as debris flow scale,frequency,gully area,main gully length,relative elevation difference and cutting density of the watershed and unstable trench to bed ratio.The results yield density of debris flow of 1.76t/m^(3),debris flow velocity of 3.03m/s and danger degree of the debris flow of 0.47.The Cigeda debris flow is a viscous debris flow of medium danger degree.
作者
曾磊
韩国平
ZENG Lei;HAN Guo-ping(The 605th Geological Party,Sichuan Bureau of Metallurgical Geological Exploration,Pengshan,Sichuan 620860)
出处
《四川地质学报》
2021年第2期273-276,共4页
Acta Geologica Sichuan
关键词
泥石流
发育特征
灰色关联法
危险性评价
祁连
debris flow
developmental characteristic
risk assessment
grey correlation method
Qilian
