Anti-Erosion Efficiency of Stands Installed On Degraded Land

Abstract

Background: The naturally present erosion phenomenon has been active throughout the geological eras, shaping the land surface to date. Today, this phenomenon causes significant damage to the environment and human activities.In the geographical conditions of Romania, where the sloping land represents up to 67% of the national territory and supported by a complex number of natural factors, as well as the intense human interventions from the end of the 19th century and the beginning of the 20th, the vegetation and soils face serious ecological imbalances. The afforestation of degraded lands gained momentum after 1948, and the most used species were pines, especially black pine and Scots pine.Methods: In order to achieve the proposed objectives regarding the evaluation of stands in terms of anti-erosion effectiveness, were analyzed the consistency of trees, the number of trees on the surface, the weight of the seedlings, and surface runoff, from the perspective of rainfall and soil retention.Results: Analyzing the influence of rain intensity, respectively 39% in compartment 49, 38% in 73 and ground retention on surface runoff, being 28% in both compartments, it results that the two parameters directly influence surface runoff. Thus, it can be stated that indirectly surface runoff is influenced by the consistency of the stands, by the degree of proximity of the crowns, which directly influence the intensity of rain and the number of trees and the vegetation that grows under them directly influences the retention in the soil through the litter that is formed, which promotes retention.Conclusions: The results obtained suggest that indirectly surface runoff is influenced by the consistency of the tree, by the degree of proximity of the crowns, which directly influence the intensity of rain.Also, the number of trees and the vegetation that grows under them directly influences the retention in the soil through the litter that is formed, which promotes retention and by creating areas that reduce the speed of water, favoring infiltration into the soil.