Természeti és antropogén tényezők szerepe az Alsó-Tisza menti partfal-instabilitások kialakulásában
Bank erosion is a major driver a river channel processes worldwide. In the case of large meandering rivers, bend formation involves delicate patterns of undercutting and bank collapses. In the paper particularly high rates and diverse types of bank erosion are presented from the Hungarian section of the Tisza River, between Csongrád and Mártély. It is observed that geomorphic selfregulation (channel adjustments after channelization) have also been influential in channel evolution. When identifying the origin, mechanisms and types of mass movements along the riverbank natural geological (tectonic control, sedimentological buildup of banks and fluvial landforms) and hydrological (river regime and groundwater dynamics) factors are contrasted with anthropogenic factors (river regulation, other built structures on the bank), which are locally of equal significance. General predictions are given for the future occurrence of bank erosion, its expected frequency governed by weather patterns and opportunities for mitigation. On the basis of landslide hazard assessment using the modified Bank Erosion Hazard Index (BEHI), bank protection measures can be located in view of the ecology of the riparian zone. Structural interventions are only proposed where human structures are threatened by riverbank erosion.
Copyright (c) 2018 Éva Kis, Dénes Lóczy
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