中文摘要：

则木河断裂带具有构造活动强烈、地震活跃、次生地质灾害严重的特点。本文以鹅掌河流域为例,通过对断裂的活动特征,地质灾害的分布规律、长期活动性与成因机制和地貌演化进行分析,研究得出：（1）则木河断裂带活动特征影响地质环境的演化。新构造运动引起断裂带局部应变失衡,断裂活动诱发频繁地震;隆起和断陷断块的差异性活动,加剧地貌演化与地表过程;沉积建造环境的不同,影响岩土体的剥蚀与沉积;断裂的掀斜运动,改变地表水系格局与地热运移。（2）活动断裂对地质灾害的控制作用,表现为灾害具有时空效应。空间上,灾害沿断裂带呈带状分布,沿水系呈线状分布,具有地层倾向性,集中于断裂破碎带的软岩,微地貌效应显著;时间上,现有地质灾害在多次地震扰动和强降雨触发下形成,鹅掌河形成高频泥石流。（3）断裂活动影响灾害成因机制和灾害类型及破坏模式,脆弱的地质环境在地震持续扰动和极端降雨的耦合作用是灾害频发的根本原因;依据灾害成灾机制,将灾害分为3大类,7小类,具有震裂斜坡的典型破坏模式。（4）活动断裂与地质灾害相互作用决定地貌演化。鹅掌河泥石流影响邛海的地貌变迁,通过计算构造隆起量与灾害剥蚀量,表明鹅掌河处于隆起区,邛海处于淤积区。由此可见,则木河断裂活动特征通过影响区域地质环境演化,诱发大量的地震地质灾害,最终由地震构造作用驱动的隆起和断陷,地表灾害过程驱动的剥蚀和淤积,两者相互作用决定现有地貌的演化。

英文摘要：

Zemuhe fault zone has characteristics of strong tectonic activity,seismic activity,and severe secondary geological disasters. This article takes Ezhang River as example and analyzes the activity characteristics of the fracture,distribution of development and long-term activity of geological disasters and its cause,morphologicalevolution and so on. The preliminary insights obtained are as follows：（ 1） The evolution of geological environment is depended on the activity characteristics of Zemuhe breaking. The neotectonic movement determines the local strain imbalance in fault zone. Fault activities frequently induce earthquakes. The different movements of the uplifts and depressions of the fault blocks shapes the ground topography. Different deposition environments impact the erosion and sedimentation of rock and soil. Fault tilting movements control water system and geothermal migration.（ 2）Active faults have control effect on geological hazards. The disaster distribution has the time-space effect. In space,the disaster is distributed along the fault zone and linear distribution along the river. Lithology has marked corresponding relationship with the development of geohazards,which concentrated in the soft rock of broken band,its corresponding relationship with micro-landform. In time,the existing geology disaster is caused by coupling effect under seismic disturbance and strong rainfall. In addition,Ezhang River has a high frequency of debris flows.（ 3） Active faults influence the cause of disaster mechanism and disaster type and failure mode. Fragile geological environment in the coupling effect of earthquake persistent disturbance and extreme rainfall is the root causes of disasters. Disasters can be divided into three major categories and 7 minor categories according to the disaster mechanism,with typical failure mode of slope cracking shock.（ 4） The interaction between active faults and geological hazards determines the landform evolution. Debris flows of Ezhang River form accumulation fans,