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标题：Special Issues Related to the Landslides of Romania
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作者：FLORINA GRECU ; LAURA COMÃNESCU
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：2010
出版社：University of Bucharest
摘要：The potential factors of landslides are: rock (physico-mechanical properties), structure (way of association of strata), slope, type of vegetation. Clays, coloid-rich marls, with a high degree of plasticity frecquently favour landslides. Clay and marl intercalations between less plastic strata lead to big landslides that affect valleys' slopes entirely. The high slope to which the lack of vegetation is added favours the producing of landslides; their type and width depend upon the rock. Tree vegetation prevents landslides to occur through its role in the circulation of precipitation and water in soil, assuring a uniformization of the slope deposits' moistening. The most important triggering factors for landslides are variations of volume and moisture content of rock masses, torrential precipitation, cutting at the slope basis, anthropic cutting of relatively stable slopes, other anthropic activities, and earthquakes. Most landslides take place after intense humid periods (spring, autumn), after torrential rainfalls following a long drought period on a highly fragmented terrain