Wpływ pokrycia roślinnego oraz opadów atmosferycznych na powstawanie osuwisk zwietrzelinowych

Abstract

INFLUENCE OF PLANT COVER AND OF ATMOSPHERIC PRECIPITATIONS UPON FORMATION OF WEATHERED ROCK LANDSLIDES Summary The paper presents the results of some new observations concerning relationship between the development of landslide processes and the character of plant cover on slopes, as well as influence of atmospheric precipitations upon formation of weathered rock landslides. Basing on the research works made in the area of the Beskids, the author states that, under certain conditions, herbaceous plants influence the intensity of landslide processes. Taking into account the examples presented in the paper, the author draws a conclusion that use of turf cover in projecting works securing slopes against formation of landslides is completely purposeless. When analyzing relationship between the formation of weathered rock landslides and atmospheric precipitations, the author points to the following dependencies: l - imbibition of weathered rock masses with water from boisterous and copious atmospheric precipitations is a direct cause of formation of weathered rock landslides, 2 - formation of weathered rock landslides decisively depends upon distribution of precipitations in time, 3 - the period of formation of weathered rock landslides falls mainly on the time of distinct increase in precipitations during the three summer months, i.e. June, July and August.