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SedyMONT - Assessment of timescales of sediment discharge in selected sites of the Swiss Alps (Illgraben, Rotenbach, Erlenbach) (IP1)

English title SedyMONT - Assessment of timescales of sediment discharge in selected sites of the Swiss Alps (Illgraben, Rotenbach, Erlenbach) (IP1)
Applicant Schlunegger Fritz
Number 120464
Funding scheme Project funding (special)
Research institution Institut für Geologie Universität Bern
Institution of higher education University of Berne - BE
Main discipline Geology
Start/End 01.05.2009 - 30.04.2012
Approved amount 200'451.00
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Keywords (8)

Survey; Earth Surface Processes; Geomorphology; Photogrammetra; Cosmogenic nuclides; Sediment discharge; time series; Alps

Lay Summary (English)

Lead
Lay summary
Understanding the timescales of sediment transfer for coupled channelized and hillslope processes are a prerequisite if the aim is to develop scenarios of landscape response to ongoing climate change. In this project, we intend to establish time series of sediment discharge and landscape change for Alpine key sites made up by Flysch deposits and gneiss that have been extensively monitored in the history, and that are representative watersheds for the interface between Alpine topography and floodplain with urban infrastructure. The goals are (i) the reconstruction of the geomorphic architecture of the study sites, (ii) quantification of landscape change during the past 50 years, and (iii) measurements of dendudation rates and sediment discharge during the past hundreds to thousands of years. The architecture of the study sites will be based on a detailed morphometric analyses a 1-m DEM within a GIS environment. This tool allows the determination of the source-to-sink relationships and the connectivity between various landscape elements. It also allows the identification of the nature of processes responsible for the transfer of sediment. This GIS-based analysis of the landscape will be complemented by detailed geomorphic mapping in the field. Quantification of process rates and sediment yields for the test sites will be performed using digital photogrammetry. In particular, we will explore historical aerial photographs for potential changes in the landscape that will be related to the hydrogeomorphological properties. In addition, we will develop time series of hazardous sediment discharge events using information retrieved by dendrogeomorphology. Finally, sediment discharge during the past hundreds to thousands of years will be assessed using the radionuclide 10Be. This isotope has proven a valuable tool to estimate sediment production rates by weathering, and to quantify the sediment flux of coupled hillslope-channelized processes for geomorphic time scales.
Direct link to Lay Summary Last update: 21.02.2013

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Associated projects

Number Title Start Funding scheme
140218 Assessment of timescales of sediment discharge in selected Alpine catchments 01.05.2012 Project funding (Div. I-III)
137516 Chronology of surface erosion in the western Peruvian Andes in response to climate variations: Calibration by OSL dating and multiple cosmogenic nuclide analyses 01.01.2012 Project funding (Div. I-III)

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