Geosciences Seminar

at the Department of Environment & Biodiversity (Geology)

 

MAMU: an R package for GIS based river terrace mapping, morphostratigraphic evaluation of terrace maps, and river long profile modelling

Thomas Pollhammer

Results of his Doctotalthesis 

 

Abstract: River terraces form as a response to regional uplift and climatic fluctuations (Bridgland & Westaway, 2008). While the intensity of climatic oscillations controls trends of aggradation and incision, it is uplift that determines the amplitude of the vertical spacing between consecutive terraces (Demoulin et al., 2017). With the onset of glacier meltdown, and the connected change from an aggradation to incision trend, river terraces are quickly abandoned, making them distinct morphologic snapshots in time, preserving information on glacial- and geodynamics. In the North Alpine Foreland, the established terrace stratigraphic model shows major inconsistencies, despite a vast amount of data (high resolution DEMs and terrace stratigraphic maps, sedimentologic data, absolute age dating, biostratigraphic data). With this background, a modern morhpostratigraphic approach has a high potential addressing currently unresolved stratigraphic questions. A GIS based method is presented, based on 2D river long profiles using digital elevation models, allowing the evaluation of existing geodata, as well as morphologic terrace mapping and paleo-river long-profile modelling.

Isar-Donau Konfluenz Stratigraphie
 

When: Tuesday, 25th June, 2024. 3 p.m.

Where:  HS 431, NLW, Hellbrunnerstraße 34, Salzburg

 

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