Identifying the instability areas provides useful information about the recognition of the vulnerable zones and, thus, helps to potentially decrease the harm to the infrastructure and the hazard conditions in inhabited areas. In this regard, morphometric parameters and tectonic setting are widely employed in mapping, modelling and understanding of instability processes. The present study is aimed to analyse the combined effects of slope morphometry (slope gradient, slope curvature, local relief), of lithology, of drainage density and of tectonic setting on the distribution of landslides. The study area is located in the Mesima Basin that lies in the central part of the Calabria region (southern Italy). The morphometric analysis was carried out by geographic information system (GIS) techniques, whereas the geomorphic attributes were computed by a digital elevation model (DEM). The recognized landslides and faults were digitized and stored in a GIS geo-database that allowed the construction of relative density maps. A total of 1 991 landslides and 231 tectonic lineaments were recognized and mapped. The distribution of the collected data suggests that the occurrence of landslides is not random. Indeed, the research highlights as the lithology, the fault density, the slope gradient and the local relief play an important role in determining the landslide occurrence. The used approach is aimed to reinforce the knowledge about the validity of the application of morphometric analysis to the landslide susceptibility. The Mesima Basin is a poorly studied area of the Calabria from a geomorphological viewpoint. Indeed, previous researches focused mainly on geological and on tectonic aspects, as well as on instability phenomena in the Mesima surroundings. Thus, this paper takes a step forward with respect to previous studies because it augments the knowledge about the relationship between faults, morphometric features and the occurrence of landslide.

中文翻译：

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构造和形态特征对滑坡分布的影响：以Mesima盆地为例（意大利卡拉布里亚）

识别不稳定区域可提供有关识别脆弱区域的有用信息，从而有助于潜在地减少对居民区基础设施的危害和危险状况。在这方面，形态计量学参数和构造背景广泛用于不稳定性过程的制图，建模和理解。本研究旨在分析斜坡形态（斜坡，斜坡曲率，局部起伏），岩性，排水密度和构造背景对滑坡分布的综合影响。研究区域位于位于卡拉布里亚地区（意大利南部）中部的Mesima盆地。形态分析是通过地理信息系统（GIS）技术进行的，而地貌属性是通过数字高程模型（DEM）计算的。识别出的滑坡和断层被数字化并存储在GIS地理数据库中，从而可以构建相对密度图。总共识别和绘制了1 991个滑坡和231个构造线。收集的数据的分布表明，滑坡的发生不是随机的。确实，该研究的重点是岩性，断层密度，坡度梯度和局部起伏在确定滑坡发生方面起着重要作用。所使用的方法旨在加强有关形态计量学分析对滑坡敏感性的应用有效性的知识。从地貌学的角度来看，梅西玛盆地是卡拉布里亚地区一个研究不足的地区。确实，先前的研究主要集中在地质和构造方面，以及Mesima环境中的不稳定现象。因此，由于它增加了有关断层，形态特征与滑坡发生之间关系的知识，因此本文相对于以前的研究向前迈进了一步。