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Volume XIX |

Landslide-susceptibility Analysis, Mapping and Validation in the Bălăcița Piedmont (South-West Romania)

Abstract: This work presents the results of applying the GIS matrix method (GMM) to the mapping and validation of landslide-susceptibility analysis in different sectors of the Bălăciţa Piedmont. The main objective of the paper concerns the achievement of landslide-susceptibility maps based on the inventory, classification and description of the landslides within the study area. The starting point was represented by the DEM and, subsequently, based on the lithological data, other determinant factors were analyzed and reclassified in a vectorial format: slope angle, slope elevation and slope aspect. After the factors that determine instability were identified for each type of mechanism, susceptibility maps were drawn. In the resulting landslide-susceptibility map a model for the validation is presented (based on the determination and calculation of a set of landslides not included in the susceptibility analysis). The landslide-susceptibility maps of the Bălăciţa Piedmont are preventive tools intended to minimize risks in the threatened areas, especially near the settlements that are located on the left slope of the Jiu river and witness the reactivation of old landslides.

Volume XVII |

The impact of human activities on the environment in the Romanați Plain (Romania), during the postcommunist era

Abstract: The purpose of the article is to present the impact of human activities on natural landscapes in the Romanati Plain. With the change of the communist regime, the form of ownership of the land has changed due to the disappearance of agricultural cooperatives. This has led to land breaking and changing the way it is used. By ccalculating some human environmental pressure indicators, based on statistical data, maps were made using GIS programs, which were then compared and interpreted, thus following the evolution of anthropic environmental impact during the period 1992-2017.

Volume XV |

Classification, Typology and Distribution of Solification Rocks in Romania

Abstract: The present paper seeks to contribute to the better knowledge of the parental rocks of different soil types that are found in Romania, as well as their share in the country’s territory.During its geological-geographical evolution, on Romania’s territory various geological (petrographic) formations have been formed, from crystalline rocks to loams, sands, fluvial and organic deposits. Because the types of rocks are numerous and their territorial distribution changes in narrower areas, the paper aims to group them according to their associating mode, genesis, as well as to their contribution to soil formation. The paper introduces a new map of solification rocks in Romania, scale 1:1.000.000, which aims not only to their theoretical classification, but also to determine the surfaces occupied by each category, and their distribution on the country’s major relief units. In addition to the new map, achieved after the processing and updating of different cartographical materials using GIS techniques, information regarding the soil types formed on each category of parental rocks is provided.

Volume X |

Indicators of the Human Pressure on the Environment in the Bălăciţa Piedmont

Abstract: The Bălăciţa Piedmont represents the western subdivision of the Getic Piedmont, being located in south-western Romania. The unit under study is an early inhabited space and, at the same time, an area of active development of numerous geodynamic phenomena. The man-induced changes had significant influences upon the environment and especially upon the relief, the increased vulnerability of the terrains to the dangerous geomorphologic phenomena being one of the most important problems that the local communities have to face nowadays. The present study aims to assess the human influence upon the emergence of environmental unbalances and especially the human actions that influence the risk geomorphologic processes. A relevant means in the process of evaluating the type and dimension of the human intervention within a given territorial unit concerns the computation of certain synthetic indicators that characterize the degree of landscape transformation. The assessment has been realized through the analysis of statistical data at the level of the administrative-territorial units that overlap the Bălăciţa Piedmont. The general research regards an interval of thirty years (1977 – 2007), while the focus was laid upon the transition period (1992, 2002, and 2007).