DBPapers
DOI: 10.5593/SGEM2016/B31/S12.051

HISTORICAL DEVELOPMENT OF THE PERMANENT GULLY EROSION - CASE STUDY TURA LUKA

M. Danacova, R. Fencik, R.Nosko
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-61-2 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 1, 391-398 pp

ABSTRACT
In this paper, we analysed the development of and changes in the selected gully over time. Historical maps and data were used to assess its spatial organisation and identify periods of erosion. Two sets of military maps were used. Coloured copies of the maps from the 1st military mapping date from the years 1769-1772 and copies of the maps from the 3rd military mapping from the years 1869-1885. Then topographic maps from 1952 and the basic maps of the Slovak Republic since 1999 were used. Orthophotos from the period 1950-2014 helped to confirm the relationship of the gully to old land use patterns. The gully was formed over a long period, but it is currently very difficult to define the parameters of the gully (its length, shape, volume). We used the terrestrial laser scanning (TLS) method and unmanned aerial vehicle (UAV) systems for the data capture of the actual physical objects and modelling the digital terrain models (DTMs). We used these models to estimate the parameters of the gully.
The historical maps indicate a difficult period in the gully’s formation between the years 1882 and 1999 (in our case study – an increase of 80%). Between the years 1950 and 2014, the length of the gully increased by 5%. The difference in the length of the gully between these periods is very small. The orthophotos show the changes in the length, area and position of the gully at different periods.

Keywords: gully erosion, cartographic works, orthophoto, point clouds