Hydrological, geomorphic and sedimentological responses of an alpine basin to a severe weather event (Vaia storm)

Predicting sediment connectivity in a mountain basin: A quantitative analysis of the index of connectivity

“…Along the hillslopes, 26 sediment sources were (re)activated, but only a few were actually contributing to the stream network. Considerable morphological changes were registered along the main channel, resulting in massive sediment deposition in the storage area at the outlet (more information can be found in Rainato et al, 2021).…”

“…The major differences regarded the presence of a large rockfall deposit (20 676 m 2 ), the stabilization of surficial erosions, increased number of landslides, and debris flow channels. After the Vaia storm, in 2019 the geomorphic response of the basin was assessed and nine newly formed instabilities were added to the inventory (Rainato et al, 2021). Moreover, 17 sources were also reactivated by the event, and thus their shape was modified and their features updated.…”

The Morphological Evolution of a Step–Pool Stream after an Exceptional Flood and Subsequent Ordinary Flow Conditions

“…It has an extension of 5 km 2 and a typical alpine climate. The mean annual precipitation is stable (1986-2018) around 1180 mm [25], whereas the mean annual temperature (T • ) has distinctly increased over 1 • C during the last three decades [26]. At present, the mean T • is around 7.5 • C. The nivo-pluvial regime of the basin favors predominant snowfalls in the late fall, during the winter season and in the early spring.…”

“…It has an extension of 5 km 2 and a typical alpine climate. The mean annual precipitation is stable (1986-2018) around 1180 mm [25], whereas the mean annual temperature (T°) has distinctly increased over 1 °C during the last three decades [26]. At present, the mean T° is around 7.5 °C.…”

“…In the rest of the year, short and intense rainfalls feature the runoff regime. Being part of the Southern Limestone Alps, the substrate of the Rio cordon is characterized by dolomites, limestones, volcanic conglomerates, and calcareous-marly rocks [25]. As the range of elevation goes from 1763 to 2763 m a.s.l., the vegetation cover is limited to 7% of the basin area.…”