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Kinematics and geologic control of the deep-seated landslide affecting the historic center of Buonalbergo, southern Italy
Geomorphology ( IF 3.9 ) Pub Date : 2021-09-20 , DOI: 10.1016/j.geomorph.2021.107961
Luigi Guerriero 1 , Ernesto P. Prinzi 2 , Domenico Calcaterra 1 , Sabatino Ciarcia 2 , Diego Di Martire 1 , Francesco M. Guadagno 2 , Giuseppe Ruzza 2 , Paola Revellino 2
Affiliation  

Deep-seated landslides are important agents of relief shaping and can have substantial impact on human settlements. Many examples are present in the Campania region of southern Italy, where the association of complex lithostratigraphic and structural geologic conditions might have effect on landslide initiation and evolution. On this basis and considering the effect that the deep-seated landslide have had in the last years on the urban settlement, the Buonalbergo landslide was analyzed in terms of decadal kinematics and geological control and insights in prospective evolution were provided. The analysis of data derived by geological and landslide field mapping, settlement damage analysis, Persistent Differential Interferometry SAR data analysis, and Finite Elements stability analysis revealed i) the approximately constant rate movement of the landslide in the last three decades with a consistent enlargement of its area, ii) the presence of a large overturned anticline, characterized by a complex lithostratigraphic arrangement and multiple discontinuity sets, iii) the presence of faults responsible for morphological depression development, iv) a rotational mechanism characterizing the upper sector of the landslide and the ongoing translational sliding of blocks located at its toe and v) the effect of potential pore pressure scenarios on prospective kinematics (i.e. single to multiple stages creep) with the observed constant rate movement potentially related to a pore pressure at the landslide base ranging between 300 and 400 kPa. Result interpretation suggests i) the role of the structural and lithostratigraphic setting of the slope as predisposing factor for landslide development, ii) the potential of fold-related fabric in controlling landslide geometry and fragmentation, iii) the possible occurrence of multiple landslide events affecting the slope affected by the deep-seated landslide and iv) the potential of hydrologic conditions in modulating landslide velocity and evolution toward slope failure. The relevance of results is related to the representativeness of the Buonalbergo landslide as common process in the Apennine context in terms of potential long-term morphologic evolution of the slope and the existence of many landslides that develop in similar geological conditions driving sediment production and inducing persistent topographic changes in mountainsides.



中文翻译:

影响意大利南部 Buonalbergo 历史中心的深部滑坡的运动学和地质控制

深层滑坡是地形形成的重要因素,可以对人类住区产生重大影响。意大利南部的坎帕尼亚地区有很多例子,那里复杂的岩石地层和构造地质条件的结合可能对滑坡的发生和演化产生影响。在此基础上,结合近年来深部滑坡对城市聚落的影响,从年代际运动学和地质控制等方面对Buonalbergo滑坡进行了分析,并提出了远景演化的见解。地质和滑坡野外测绘所得数据分析、沉降损害分析、持续微分干涉SAR数据分析、结果解释表明 i) 斜坡的结构和岩石地层环境作为滑坡发展的诱发因素的作用,ii) 褶皱相关结构在控制滑坡几何形状和破碎化方面的潜力,iii) 影响滑坡的多个滑坡事件的可能发生受深部滑坡影响的斜坡和 iv) 水文条件在调节滑坡速度和斜坡破坏演变方面的潜力。结果的相关性与 Buonalbergo 滑坡作为亚平宁环境中常见过程的代表性有关,就斜坡潜在的长期形态演变而言,以及许多在类似地质条件下发展的滑坡的存在,驱动沉积物产生并诱导持续存在。山腰的地形变化。

更新日期:2021-09-27
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