拖海小流域泥石流危险性评价  

Risk Assessment of Debris Flow in the Small Watershed of Tuohai

作　　者：刘星星 毛吉成 张成奎 许广飞 张冲冲 LIU Xing-xing;MAO Ji-cheng;ZHANG Cheng-kui;XU Guang-fei;ZHANG Chong-chong(Key Laboratory of Karst Environment and Geological Hazard Prevention,Ministry of Education(Guizhou University),Guiyang 550025,China;College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]喀斯特环境与地质灾害防治教育部重点实验室(贵州大学),贵阳550025 [2]贵州大学资源与环境工程学院,贵阳550025

出　　处：《水利科技与经济》2020年第7期65-70,共6页Water Conservancy Science and Technology and Economy

摘　　要：为了了解掌握拖海小流域泥石流的情况及对拖海小流域泥石流沟进行危险性评价,采用遥感技术、GIS和模糊数学模型相结合的方法对本研究区的泥石流进行评价。通过拖海小流域泥石流的流域面积、流域高程差、主沟纵坡降、泥石流沟密度等评价因子的选取以及权重划分,从而对拖海小流域进行危险性评价分级,最终通过ARCGIS对权重叠加分析得到危险性分级图。研究结果表明,拖海小流域中有中等危险的泥石流沟占54.8%;低危险泥石流沟占45.2%;研究区内无危险性高和极高的泥石流沟。In order to clarify the situation of debris flow in the small watershed of Tuohai and the risk assessment of debris flow in the small watershed of Tuohai.In this paper,the debris flow in the small watershed of Tuohai is evaluated by a combination of remote sensing technology,GIS and fuzzy mathematical models.Based on the selection of the assessment area and the weighting of debris flow in the small basin of Tuohai,the elevation difference of the basin,the vertical slope of the main ditch,and the density of the debris flow ditch,etc.,the risk assessment of the small watershed in Tuohai was classified.Finally,the risk classification map was obtained by ARCGIS weighted overlap analysis.It was found that 54.8% of the debris ditch with moderate danger were found in the small watershed of Tuohai;45.2% of the debris ditch with low danger was found.There are no high-risk and extremely high debris flows in the study area.

关 键 词：小流域 泥石流 危险性 评价 

分 类 号：P642.23[天文地球—工程地质学]