Abstract
Along the Hungarian-Austrian border the rainfalls of 2009 and 2010 have reached intensities of 100 mm day−1. The events have caused flash floods along watercourses and had remarkable geomorphological impacts: accelerated the evolution of existing erosional and depositional landforms (headwater channels, rills, gullies, gorges, minor alluvial fans, and sediment veneers) and generated new features in the Kőszeg Mountains, Western Hungary, of metamorphic rocks, and a deep weathering mantle. In addition to the rainfall properties, we found that the most influential conditions on the rate of erosional processes and the extent of damage in foothill settlements were the high density of roads, the depths of surface deposits, and the slope inclinations on watersheds. Gullies and alluvial fans are classified by their origin and response to disastrous hydrometeorological events.
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