中文摘要：

合理的流变参数选取对准确刻画泥石流、高速远程滑坡运动过程和动力行为至关重要。本研究基于三维连续介质动态数值模型,构建Voellmy流变模型,结合方差分析方法,比较了不同流变参数对泥石流运动行为的影响程度。结果表明：动力底摩擦角和湍流系数均会对泥石流与高速远程滑坡的动力特征产生一定的影响,但影响程度各异。较大的动力底摩擦角会产生更大、更快的能量耗散过程,使得运动过程整体滞后;较高的湍流系数增加了流体层之间的动量交换强度,具有较大的与周围界质混合的能力,对周围介质的卷吸作用增大。物源区体积（湍流系数）在一定程度上仅影响泥石流运动速度,对致灾范围和规模影响作用不大。沟道下垫面情况、颗粒物组成、孔隙水压力（底摩擦角）与灾害体流速、移动距离和堆积区体积、面积关系很密切,在很大程度上影响泥石流、滑坡强度,致灾范围和规模。研究成果以期为流变参数选取提供很好的借鉴方法,也为地质灾害防治提供一定的技术参考。

英文摘要：

Reasonable selection of rheological parameters may play a role in delineating the runout process mobility behavior of debris flow and high speed and long distance landslide. In this study,three-dimensional continuum model simulation method is applied using voellmy model and analysis of variance,to study the dynamic process under different rheological parameters,and to a compare the sensitivity degree of rheological parameters to runout behavior. The results show that dynamic basal friction angle and turbulence coefficient can influence the dynamic characteristics of debris flow and high speed and long distance landslide to a different degree. The higher dynamic basal friction angle will produce bigger and faster energy dissipation process,making the whole movement processlag; the higher turbulence coefficient increased strength momentum exchange between the fluid layers,with great ability to mix media around,and increased entrainment effect. The basal topography is an important factor influencing the debris transportation and deposition processes. The underlying surface conditions,particles of debris,pore water pressure has a very close connection with velocity,runout distance and deposition area,volume,and can affect the debris intensity and disaster area and scale to a large extent. The proposed suggestions can be estimated conveniently in general geotechnical practices and can provide the scientific basis for regional disaster prevention and reduction and scientific research.