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| Titel |
Using connectivity to assess soil erosion in the landscape; applications of a new paradigm in soil erosion modelling |
| VerfasserIn |
Lorenzo Borselli, Olga Vigiak, Azalea Judith Ortiz Rodriguez |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250077707
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| Zusammenfassung |
| Hydrologic and sedimentological connectivity concepts recently appeared as novel paradigms
(Bracken and Croke , 2007) and tools to assess soil erosion at various scales. The landscape
flow connectivity index IC (Borselli et al. 2007, 2008) is based on the ratio of hydrological
distance to streams with the potential upstream runoff occurrence, hence allows mapping
surface runoff connectivity and erosion across the landscape. After its first introduction,
several studies applied the IC algorithm in very different geographic regions and
territorial scale: 150 km2 watershed in Tuscany (Italy; Borselli et al. 2007, 2008); 20
small catchments (5 to 350 ha) in Murcia (Spain; Sougnez et al. 2011); 400 km2
watershed in Basilicata (South Italy; Borselli et al. 2011); 3300 km2 watershed in
Victoria (Australia; Vigiak et al. 2012); 6 and 8 km2watersheds in the Italian Alps
(Cavalli et al., in press); 74 ha catchment in Spanish Pre-Pyrenees (López-Vicente et
al. 2013). Meanwhile, the IC index has been adapted for application to different
erosion processes, i.e. hillslope erosion (Vigiak et al. 2012; López-Vicente et al.
2013), sediment remobilization by shallow landslides (Borselli et al. 2011), and
debris flow (Cavalli et al. in press). Validation of IC index applications in spatially
distributed erosion models has been conducted with field observations at hillslope
scale, calibration against sediment yield estimates at several monitoring stations.
These scientific results highlight the promising potential application of IC concept
for erosion modelling. In this session, the IC model with all its proposed variants
will be described. Future work perspectives, including potential developments of
IC approach as an alternative method to classical soil erosion modelling, will be
discussed.
Acknowledgement: This study has been funded by CONACYT (Mexico); Proyecto
CB-2012-01/184060 |
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