Exposure ages make it possible to determine the time of weathering of a rock surface. They can be determined from rebound values measured with the Schmidt hammer and calibrated on surfaces of known age, defined in this study thanks to historical cartography and two mule tracks built in 300 and 1250 CE, which allowed us to reconstruct glacier fluctuations over the last 3 centuries in Val Scaradra and to define the time of deglaciation and rock glacier development in the Splügenpass region.
In mountain environments, active geomorphological processes have a strong influence on plant diversity because they act as renovators for habitats of pioneer species. In this paper, we propose criteria to assess the ecological value of dynamic mountain geomorphosites. We show that the interest of plant communities and the influence of geomorphological processes on plant communities are fundamental criteria for assessing ecological value in an exhaustive and objective way.
Soil erosion by wind and water is a commonly recognized phenomenon on agricultural land. Erosion in forests is studied less and generally considered to be limited because of the soil protection by vegetation. However, trees, when toppled because of old age or wind, loosen a considerable amount of soil when their roots are pulled from the ground. In addition, the holes left in the ground act as collectors for water and concentrated runoff, causing significant soil loss on forested slopes.
La riduzione del rischio, nelle aree poste in prossimità di pareti rocciose, mediante gestione dei sistemi di monitoraggio con finalità d'allerta evidenzia potenzialità, ma anche numerose criticità e limiti. L'articolo prende in esame due frane, originatesi da pareti rocciose, avvenute in prossimità di aree abitate nelle Alpi. Si analizzano costi ed efficacia sia delle opere di difesa sia dei sistemi di monitoraggio con funzione di early warning anche in relazione a soglie d'allerta e scenari.