Journal
JOURNAL OF MAPS
Volume 16, Issue 2, Pages 890-901Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17445647.2020.1841036
Keywords
river catchments; object-based map; geomorphic connectivity; sediment cascade; glaciated environments
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Funding
- Free University of Bozen-Bolzano
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An area-wide digital geomorphological map consisting of 12,180 non-overlapping polygons was created for the Sulden river basin (South Tyrol, Italian Alps) with the purpose to carry out a GIS-based sediment connectivity analysis. Thirty-one landform types were defined with respect to their role within sediment cascades. As such, the classification and the related symbology partly differ from a traditional geomorphological map where several areal objects are frequently represented by scaled and rotated point symbols. The catchment (similar to 130 km(2)), exhibits a high geomorphological variability as well as relatively large glacierized areas. We used the geomorphological map for a first qualitative estimate of the main differences between the two major sub-basins concerning the components of the sediment cascades: while the Trafoi sub-catchment exhibits a high number of small landslides and debris flow channels (i.e. source and transport landforms), the Sulden sub-catchment is rather characterized by large proglacial and talus landforms (i.e. temporary storage landforms).
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