For the experimental station Masse threshold levels able to separate interrill erosiveevents from non erosive events were developed and tested. The Masse databasewas composed of 258 rainy events (189 non-erosive events and 70 interrill erosiveevents). Thresholds for separating erosive-interrill events from erosive-rill eventswere developed and verified at Sparacia analysing 77 erosive events (64 interrill and13 rill). At Masse the threshold in terms of event rainfall depth, Pe, was, among theanalyzed variables, the most effective one to distinguish between non-erosive anderosive interrill rainfall events. The rainfall events with a total depth Pe > 13 mm areidentified as interrill erosive events. This value is very similar to the 12.7 mm selectedby Wischmeier and Smith (1958) that propose a compound criterion (Pe > 12.7 mm orI15 > 6,35 mm in 15 minutes). In our case the compound criterion does not guarantee an improvement in the effectiveness of the single threshold. At Sparacia the threshold I15 > 8,75 mm in 15 min is the most effective, among those analyzed, to select erosiverill events from all erosive events.
|Numero di pagine||10|
|Stato di pubblicazione||Published - 2018|