Attila PETRIK¹ & Gyozo JORDAN^2
1Department of Physical and Applied Geology, Eötvös University, Pázmány Péter sétány 1/C, 1117, Budapest, Hungary, petrik.atus@gmail.com
²Department of Chemsitry, Szent István University, Práter Károly u.1., 2100, Gödöllő, Hungary, gyozo.jordan@gmail.com

SYSTEMATIC DIGITAL TERRAIN MODEL CONSTRUCTION AND MODEL VERIFICATION WITH MULTI-SOURCE FIELD DATA. MORPHOTECTONIC ANALYSIS IN THE VILLANY HILLS AND ITS SURROUNDINGS, SW HUNGARY

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The objective of this study is presenting a systematic digital terrain modelling method and testing its capabilities on poorly defined thrust fault-related actively uplifting area. A further objective is to present a detailed verification of digital terrain modelling results using field observation of more than 1,000 structural field measurements, geophysical seismic sections and geological information. Finally, tectonic stress field models are compared to the terrain modelling results and relating digitally identified geomorphological features. Systematic digital terrain modelling proceeds from simple univariate analysis of elevation and its derivatives to the more complex bivariate stereonet analysis, digital drainage network analysis and to lineament pattern analysis. Morphotectonic lineaments identified on shaded relief map were used to compare them to the known tectonic lines in the study area. The combined usage of 200 digital morphologic cross-sections and slope-breaks on profile curvature maps were used to reveal the asymmetry of surface topography along the known tectonic lines. Linear valleys and ridge lines were defined as drainage and watershed lines by means of digital drainage network analysis. Results show that the orientation of the measured structural field data correlate to the orientation of the various observed morphological lineaments such as drainage elements. This study identified valley rotation and en-echelon arrangement of some morphological features in the study area, together with a major strike-slip fault delineating the southern boundary of the studied thrust zone, unknown before.