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以近期开展的区域性调查、勘查项目所得的1031处滑坡数据为基础,分析了白龙江流域地质背景和外部环境主要因素中滑坡分布的敏感区段,以及不同规模滑坡的分布特征及其主控因素的敏感区段,探讨了各个因素控制和影响滑坡分布的内在机理.研究发现,流域内滑坡在以下地段集中分布:中山区、地形坡度15°~45°斜坡区、层状浅变质岩+灰岩岩组分布区、距离主干段断层10 km范围内、地震烈度Ⅶ~Ⅷ度区、小时最大降雨量35~40 mm地区、白龙江及其一级支流河谷两岸以及人口密度大于10人/km~2地区.巨型滑坡更加密集于中山区、浅变质岩+灰岩岩组分布区、距离主要断裂带不足5 km范围内以及白龙江及其一级支流河谷两岸;中小型滑坡在低山丘陵区、松散土层分布区、白龙江二级及以下支流岸坡上以及人口密度大于100人/km~2地区更为集中;大型滑坡分布特征介于二者中间.巨型滑坡对断裂、地形、软岩敏感性最强,中小型滑坡对降雨、松散土体、人类活动最为敏感.
Based on the 1031 landslide data obtained from the recent regional survey and exploration project, the sensitive sections of the landslide distribution in the geological background and the external environment of the Bailongjiang River Basin are analyzed, as well as the distribution characteristics and main controlling factors of the landslides with different scales , The intrinsic mechanism of controlling and influencing the landslide distribution is discussed.The results show that the landslides in the basin are concentrated in the following areas: Zhongshan District, slope area with the gradient of 15 ° ~45 °, layered metamorphic rock + gray In the distribution area of rock and rock group, within the range of 10 km from the main section fault, the seismic intensity is from Ⅶ to Ⅷ degree, and the maximum hourly rainfall is from 35 to 40 mm. Both sides of the Bailong River and its primary tributary valley and the population density of more than 10 persons / km ~ 2. The giant landslides are more densely distributed in the distribution areas of Zhongshan, Shallow metamorphic rocks and limestone rocks within less than 5 km of the main fault zone and across the banks of the Bailong River and its first-level tributary valleys. In the hilly areas, Loose soil distribution, Bailongjiang second and below the tributaries of the bank slope and the population density of more than 100 people / km ~ 2 area more concentrated; large landslide distribution characteristics in the two . Massive landslide on the fracture, terrain, soft rock strongest sensitivity, small and medium rainfall landslides, loose soil, the most sensitive to human activities.