Morfometriske og morfologiske undersøkelser av solifluksjon ved hjelp av fjernanalytiske verktøy

Abstract

This study presents an alternative measurement protocol for assessing morphometric dimensions and morphological features of solifluction landforms. It utilizes remote sensing applications based on orthophotos and tools included allow measurements of various parameters. The same applications are utilized for developing a method for estimating geomorphic work of solifclution processes through postglacial times. The methods are implemented at six different locations in Southern Norway, with all representing distinctive climatic and environmental characteristics. The study finds the utilized applications useful and time-saving, although certain limitations are acknowledged and voiced. Morphometric results come out as complex and there is not possible to relate morphometric parameters to a precise description of solifluction landforms, or to relate parameter ratios to distinct morphology. However, some morphometric ratios (Riser Height:Tread Length) do come out as interesting, although more data is needed to confirm a firm connection. Block lobes in autochthonous blockfield stand out as much more regular in terms of morphology than the turf banked shapes, as well as representing larger morphometric dimensions. The localities with these features are also found to perform most geomorphic work. The geomorphic work is generally measured to be very high in this study, which highlights the role of solifluction as a denudational agent.