RT Journal Article
T1 Geodynamic processes on sandy slope gullies in central Spainfield observations, methods and measurements in a singular system
A1 Lucía Vela, Ana
A1 Laronne, Jonathan
A1 Martín Duque, José Francisco
AB Gullies developed on sandy lithologies are scarce and few studies have been reported on these landscapes. This paper presents an approachto study such singular landforms. The studied gullies appear on the slopes of a group of mesas and cuestas of Upper Cretaceous sedimentslocated in the Northern piedmont of the Guadarrama Mountains, Spain.Landforms of these gullied areas were catalogued, characterized and quantified with reconnaissance methods, providing informationabout the most active geomorphic processes. These are being monitored in a 1.32 ha representative gullied catchment, the Barranca de losPinos. In its high gradient slopes, where mass movements occur, high resolution topographical surveys are being carried out by TerrestrialLaser Scanning (TLS). On low gradient slopes, runoff and rain splash are being monitored in micro plots; and in the main channel, sedimenttransport and water discharge are being measured.This ensemble of methods, some of them novel, is providing patterns of sediment movement within the gully system, and a hypothesis ofhigh activity rates has been confirmed. High gradient sand slopes without carbonate caprock erode fourfold compared to the capped slopes.In the low gradient slopes, those ungullied produce more runoff while exposed sands yield more sediment; sands covered by litter producethe least runoff and sediment. Notably, this catchment yields mainly bedload.
PB Taylor & Francis
SN 0985-3111
YR 2011
FD 2011
LK https://hdl.handle.net/20.500.14352/43699
UL https://hdl.handle.net/20.500.14352/43699
LA eng
DS Docta Complutense
RD 16 ago 2024