| Abstrakt: |
This study deals with the assessment and mapping of neotectonic landscape deformation. Multi-criteria decision analysis (MCDA), generalized linear model (GLM), and weighted linear combination (WLC) procedures were conducted for the calculation of the neotectonic landscape deformation index (NLDI). The aim of this study is to evaluate the relative tectonic activity and to investigate the contribution of neotectonic processes in the development of the fluvial landscape. Eighteen morphometric parameters, including drainage basin slope (Sb), hypsometric integral (Hi), asymmetry factor (Af), relief ratio (Rh), Melton's ruggedness number (M), index of relative tectonic activity (Irta), amplitude relief (Ar), normalized stream length gradient index (slk), drainage density (Dd), drainage frequency (Fu), slope gradient (s), topographic wetness index (Twi), lineament density (Ld), lineament frequency (Lf), lithology (lth), hierarchical anomaly index (ΔA), river longitudinal slope index (SL), and topography symmetry (T), were estimated for a total of 11 drainage basins. The combination of the calculated morphometric parameters led to a new single integrated index of relative tectonic activity (named Irta). Following this indexing, the basins were characterized as low, moderate, or high relative tectonic activity. The quantitative analysis showed that the development of the present drainage systems and the geometry of the basins of the study area have been influenced by the tectonic uplift caused by the activity. The spatial distribution of the values of the new integrated Irta index showed significant differences among the drainage basins that reflect differences in relative tectonic activity related to their location with regard to the fault systems of the study area. The study is based on the combination of morphotectonic, geomorphological, and geological parameters. The GIS-based spatial MCDA led to the classification of the study area into three classes of neotectonic deformation (from very low to very high) and to a neotectonic deformation map. Areas of high and very high deformation are related to the major active faults. Other minor active normal faults of medium to high seismic risk level, affecting the northern and northeastern parts, are also associated with areas of intense landscape neotectonic deformation. The results indicate the existence of major morphological and morphometric anomalies of the landform and the drainage network of the study area. The morphological and morphometric characteristics presented here are considered to be sufficient to affirm that the configuration of the landform and the drainage network of the study area have been influenced by lithological structures and tectonic activity resulting from the ongoing tectonic separation. [ABSTRACT FROM AUTHOR] |
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