期刊名称：Annals of the University of Bucharest : Geography Series
印刷版ISSN：1013-4115
电子版ISSN：2247-238X
出版年度：2012
出版社：University of Bucharest
摘要：The Hartibaciu Tableland (4,000 sqkm, 80 km long and 50 km wide) is a distinct subunit of the Transylvanian Tableland. Sarmatian and Pannonian sedimentary formations represent an alternation of impermeable marly-claey strata and permeable strata of sands, loosely cemented sandstones and conglomerates with a monocline structure, locally disturbed by folds of a general E-W or N-S orientation. The grade of fragmentation in point of energy and density of slopes, geodeclivity, climate and edaphic conditions, as well as human intervention reflect in the diversity of present-day geomorphic processes. A hierarchy of geomorphic risk classes ¨C high, moderate and low, has been established based on slope dynamics, as the outcome of a combination of main criteria (type of dominant process, volume of material dislodged by erosion, landslides and human activity). Transition from one class to another has rather a limited value for predicting process evolution. The normal evolution of natural processes in agreement with slope balance at a certain moment, tends to stabilise the terrain. Whenever extreme natural phenomena cause imbalances on slope, bringing about changes of relief configuration and producing material damage or casualties, geomorphological hazards develop
