engleski

Assessing the Impacts of Lithology on Short-term Gully Evolution using the Very-high Resolution UAV Photogrammetry

In this study we focus on the assessment of impacts of lithology on short-term gully evolution, with special emphasis on detection and quantification of one-year gully erosion induced spatio-temporal changes (STCs) within different lithological units. Study was implemented within the lithologically versatile wider area of gully Santiš (13 881.613 m2), located within the karst relief of the Pag Island (Croatia). Repeat UAV photogrammetry was used for creation of very-high resolution (VHR) digital surface models (DSMs) of study area. Detection of gully erosion induced STCs was based on creation of digital elevation model of difference (DoD) from two created multi- temporal DSMs, using the Geomorphic change detection 7 software. Detailed lithological map (1:50) of whole study area was created through the comprehensive field lithological mapping. Carried study has confirmed that short-term gully evolution within specific karstic relief is highly affected by lithology, which directly controlls the intensity and distribution of erosion processes. Combined use of repeat UAV photogrammetry derived VHR DoD and detailed field lithological mapping has shown great potential for detection and monitoring of complex STCs and interpretation of short-term gully evolution. Due to that this methodology can be applied for monitoring of short-term geomorphic evolution in other lithologically complex areas.

Gully erosion ; repeat UAV photogrammetry ; lithological mapping

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