Rockglacier activity studies on a regional scale: comparison of geomorphological mapping and photogrammetric monitoring |
| |
| Authors: | Isabelle Roer Michael Nyenhuis |
| |
| Institution: | 1. Department of Geography, University of Bonn, Bonn, Germany;2. Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland;3. Present address: Federal Institute of Hydrology (BfG), Koblenz, Germany. |
| |
| Abstract: | In their spatial distribution as well as in their different states of activity, rockglaciers imply important information on former and recent permafrost conditions. Two different methods were applied in one study area (Turtmann Valley, Swiss Alps) in order to compare their suitability in assessing rockglacier activity. The comparison of geomorphological mapping and photogrammetric monitoring demonstrated a good accordance, especially on a regional scale. On a local scale, some differences in delimitation of the landforms as well as in the degree of activity were found. One reason for the observed differences is the qualitative character of geomorphological mapping resulting from the variable suitability of single parameters and combinations thereof in the determination of rockglacier activity. Based on these results, geomorphological mapping of rockglaciers can be improved by data from photogrammetric monitoring. Therefore, at best the two methods are combined when analysing former and present permafrost distribution. Copyright © 2007 John Wiley & Sons, Ltd. |
| |
| Keywords: | rockglacier permafrost geomorphological mapping photogrammetry high mountains |
|
|
