Efectos de las rodadas de tractores en la escorrentía y erosión de suelos en laderas cultivadas con viñedos
Cuadernos de Investigación Geográfica = Geographical Research Letters
Nº 38 (1) pp. 115-130 ISSN 0211-6820 Cuadernos de Investigación Geográfica 2012 © Universidad de La Rioja 116 Arnáez et al. etc.) are carried out with tractors that usually move in the direction of maximum slope, generating wheel tracks approximately 50 cm wide and 5-7 cm deep. The displacement of tractors on plots leads to the compaction of the topsoil and the subsoil. On the other hand, the location of vineyard parcels on steep slopes favours the erosive impact of surface runoff. This paper
... unoff. This paper provides information on the role played by wheel tracks on soil loss by runoff in vineyards. To obtain this information, rainfall simulations with different intensities were carried out. The results confirm that, with moderate and high rainfall intensity, the runoff starts earlier and reach higher values in wheel tracks, due to compaction of the topsoil. Differences between wheel tracks and interrills are less pronounced on sediment yield. These differences are minimal in high intensity storms, having the tractor tracks lesser importance in erosion. By contrast, the drainage micro-network of hillslopes, eliminated by tillage and reactivated by heavy rainfall, seems to have more impact on runoff and erosion. The results obtained with the rainfall simulation experiments shed light on the relationships between runoff, raindrop impact and suspended sediment transport. Palabras clave: escorrentía, producción de sedimentos, rodadas, mecanización viñedos.