Extraction of morphotectonic features from DEMs: Development and applications for study areas in Hungary and NW Greece |
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| Institution: | 1. Department of Sciences and Technologies, University of Sannio, via Port''Arsa 11, 82100 Benevento, Italy;2. U.S. Geological Survey, MS 966, Denver Federal Center, Denver, CO 80225, USA;1. Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic;2. Institute of Rock Structure and Mechanics, Czech Academy of Sciences, V Holešovičkách 94/41, 182 09 Prague 8, Czech Republic;3. Department of Physical Geography and Geoecology, Faculty of Science, University of Ostrava, Chittussiho 10, Ostrava 710 00, Czech Republic;2. Institute of Agro-Environmental and Water Economy Research–INAGEA, University of the Balearic Islands, Palma, Spain;1. Department of Physical Geography and Geoecology, Faculty of Science, University of Ostrava, Chittussiho 10, Ostrava 710 00, Czech Republic;2. Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic;3. Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic, V Holešovičkách 41, Prague 8 182 09, Czech Republic;4. Institute of Geological Engineering, Technical University of Ostrava, 17. listopadu 15, Ostrava-Poruba 708 33, Czech Republic;1. Key Laboratory of Computational Geodynamics, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China;2. Department of Geological Sciences, University of Missouri, Columbia, MO, USA |
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| Abstract: | A procedure for the consistent application of digital terrain analysis methods to identify tectonic phenomena from geomorphology is developed and presented through two case studies. Based on the study of landforms related to faults, geomorphological characteristics are translated into mathematical and numerical algorithms. Topographic features represented by digital elevation models of the test areas were extracted, described and interpreted in terms of structural geology and geomorphology. Digital terrain modelling was carried out by means of the combined use of: (1) numerical differential geometry methods, (2) digital drainage network analysis, (3) digital geomorphometry, (4) digital image processing, (5) lineament extraction and analysis, (6) spatial and statistical analysis and (7) digital elevation model-specific digital methods, such as shaded relief models, digital cross-sections and 3D surface modelling. A sequential modelling scheme was developed and implemented to analyse two selected study sites, in Hungary and NW Greece on local and regional scales. Structural information from other sources, such as geological and geophysical maps, remotely sensed images and field observations were analysed with geographic information system techniques. Digital terrain analysis methods applied in the proposed way in this study could extract morphotectonic features from DEMs along known faults and they contributed to the tectonic interpretation of the study areas. |
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| Keywords: | Digital elevation model Digital terrain modelling Morphometry Structural geology Tectonic geomorphology |
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