【摘要】 东江镇位于陇南市武都区东部,白龙江自西北至东南贯穿研究区。该区总面积为15.2 km~2,地势总体呈北部高、南部低,地貌类型分别为侵蚀构造中山和侵蚀堆积河谷。区内共发育地质灾害39处。在分析该区域地质灾害发育特征与时空分布情况的基础上,从地形地貌、地层岩性、地质构造、降雨、人类工程活动等方面对其形成条件进行总结研究,结果表明:研究区内地质灾害主要是崩塌、滑坡、不稳定斜坡和泥石流。68%的崩塌、滑坡和不稳定斜坡位于研究区中部的陇南站北侧,而泥石流主要集中在研究区北部的侵蚀构造中山区;区内崩塌、滑坡的主要诱因是人类工程活动和降水;不同地质灾害的形成条件有所差异,研究区内滑坡、崩塌、不稳定斜坡的形成条件主要包括较大临空面、软弱岩组、强烈构造运动、丰富的降雨和地下水储存、地震频发和人类工程活动剧烈等,泥石流的形成条件主要包括陡峻的地形、丰富的固体物质储量、降雨以及人类工程活动。研究结果为区域地质灾害防治和预测预报提供了基础依据。更多还原

【Abstract】 Dongjiang Town is located in the eastern part of Wudu District, Weinan City. The Bailong River runs through the study area from northwest to southeast. The total area of the area is 15.2 km~2, and the terrain is generally high in the north and low in the south. The landform types are the eroded tectonic mid-mountain and the eroded accumulation valley. There are 39 geological disasters in the area. Based on the analysis of the development characteristics and spatial and temporal distribution of geological disasters in this area, the formation conditions are studied from the aspects of topography, stratum lithology, geological structure, rainfall, human engineering activities, etc. The results show that: geological disasters in the study area Mainly collapses, landslides, unstable slopes and mudslides. 68% of the collapse, landslide and unstable slopes are located on the north side of Weinan Station in the middle of the study area, while the debris flow is mainly concentrated in the mountainous areas of the eroded structure in the northern part of the study area; the main causes of collapse and landslides in the area are human engineering activities and precipitation; The formation conditions of geological disasters are different. The formation conditions of landslides, collapses and unstable slopes in the study area mainly include large aerial surfaces, soft rock groups, strong tectonic movements, abundant rainfall and groundwater storage, frequent earthquakes and humans. Engineering activities are intense, and the formation conditions of debris flows mainly include steep terrain, abundant solid matter reserves, rainfall, and human engineering activities. The research results provide a basis for the prevention and prediction of regional geological disasters.更多还原