0000000000748937
AUTHOR
Alessandra Vinci
Caratterizzazione morfologica e idraulica dei rill rilevati nell'area sperimentale di Masse
Nella memoria sono riportati i risultati di un’analisi finalizzata alla validazione in ambiente Umbro di modelli per la quantificazione e la caratterizzazione morfologico-idraulica delle formazioni rill. A tale scopo sono state utilizzate le misure effettuate presso la stazione sperimentale per il monitoraggio dei processi erosivi a scala di parcella in località Masse (Umbria). In seguito a due eventi erosivi (11-01-2010 e 16-05-2011) che hanno prodotto la formazione di rill, è stato effettuato il rilievo della morfologia (lunghezza e sezione) e del profilo degli stessi. Il database di Masse è stato utilizzato, in primo luogo, per la validazione della relazione di potenza che permette la st…
Practical thresholds to distinguish erosive and rill rainfall events
Abstract In this paper, 1017 rainfall events from 2008 to 2017 are used to identify the rainfall threshold that produces upland erosion at the Masse (central Italy) and Sparacia (southern Italy) experimental stations. The rainfall events are classified into three classes: non-erosive, interrill-only and rill. The threshold values for separating as correctly as possible the erosive rains (case I) and the rill rains (case II) are derived solely from the hyetograph. Each threshold value is obtained by imposing that the long-term erosivity of the events above the threshold is equal to the long-term erosivity of all erosive events (case I) or only rill events (case II). The performances of selec…
A Check of Water Drop Impact Effects on Surface Soil Saturated Hydraulic Conductivity
The post-tillage dynamics of the surface soil saturated hydraulic conductivity, Ks, was studied at the Masse experimental station (central Italy, silty-clay-loam soil). A sequence of experiments was performed by rainfall simulation on two replicated micro-plots (width 1 m, length 0.92 m, slope 16%) established on bare soil. Each high-intensity rainfall simulation was preceded by a low-intensity wetting phase. The soil water content, w, was measured before wetting and both before and after simulation. Runoff was measured at 5 min intervals. The infiltration rate was calculated as the difference between rainfall intensity and runoff rate. Finally, Ks was assumed to be equal to the infiltratio…