Innsbruck, Austria
Innsbruck, Austria

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Wessels M.,Institute For Seenforschung | Anselmetti F.,University of Bern | Artuso R.,Bundesamt fur Landestopografie Swisstopo | Baran R.,AirborneHydroMapping GmbH | And 12 more authors.
ZFV - Zeitschrift fur Geodasie, Geoinformation und Landmanagement | Year: 2015

Within the project "Tiefenschärfe - hochauflösende Vermessung Bodensee" a high-resolution seamless terrain model is created using airborne topobathymetric laserscanning and multibeam echosounder (MBES) techniques. The project visualizes the enormous wealth of features of underwater landscapes of lakes. The combination of hydroacoustic (multibeam echosounder) and laser-optic (topobathymetric laserscanning) methods was used for the first time in a freshwater body of this size. Opportunities, limitations and restrictions of these high-resolution methods are presented. © 2015, Wissner Verlag. All rights reserved.

Baran R.,Ludwig Maximilians University of Munich | Baran R.,Airbornehydromapping GMBH | Friedrich A.M.,Ludwig Maximilians University of Munich | Schlunegger F.,University of Bern
Lithosphere | Year: 2014

We synthesized published data on the erosion of the Alpine foreland basin and apatite fission-track ages from the Alps to infer the erosional sediment budget history for the past 5 m.y. The data reveal that erosion of the Alpine foreland basin is highest in front of the western Alps (between 2 and 0.6 km) and decreases eastward over a distance of 700 km to the Austrian foreland basin (~200 m). For the western Alps, erosion rates are >0.6 km/m.y., while erosion rates for the eastern foreland basin and the adjacent eastern Alps are <0.1 km/m.y., except for a small-scale signal in the Tauern Window. The results yield a large ellipsoidal, orogen-crossing pattern of erosion, centered along the western Alps. We suggest that accelerated erosion of the western Alps and their foreland basin occurred in response to regional-scale surface uplift, related to lithospheric unloading of the Eurasian slab along the Eurasian-Adriatic plate boundary. While we cannot rule out recent views that global climate change led to substantial erosion of the European Alps since 5 Ma, we postulate that regional-scale tectonic processes have driven erosion during this time, modulated by an increased erosional flux in response to Quaternary glaciations. © 2014 Geological Society of America.

Baran R.,Airbornehydromapping GMBH | Dobler W.,Airbornehydromapping GMBH | Steinbacher F.,Airbornehydromapping GMBH | Ritter M.,Airbornehydromapping GMBH | Aufleger M.,Airbornehydromapping GMBH
AVN Allgemeine Vermessungs-Nachrichten | Year: 2015

Knowledge about the hydraulics in alpine torrents is relevant to quantify for example flood risks or sediment transport. High-quality terrain data of the riverbeds, riverbanks, and floodplains are required for reliable hydraulic calculations. Terrain models of the floodplains are typically reconstructed from airborne light detection and ranging (LiDAR) data and combined with terrestrial surveys of the riverbeds. The latter are carried out along cross-sections and necessary, as these lasers usually cannot penetrate through the water surface. Therefore, data of the riverbeds' and riverbanks' geometry is hardly available at such a high resolution and extent comparable to airborne LiDAR based data of the floodplains. Here, a newly available airborne water-penetrating LiDAR system was used to survey alpine torrents. Detailed and extensive data of riverbeds and riverbanks were acquired (30 points/m2), and used for Telemac2D simulations. Mesh creation is based on breaking edges and on downsampling of the point cloud. Finally, a calibration was done based on abundant water surface points stemming from the hydromapping data. The data turned out to be very suitable for constructing computational grids of the riverbed. This is confirmed by a comparison of simulation results (cross-sections vs. hydromapping). Our results show new possibilities in comparing measured and simulated water heights. © 2015 avn.

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