DBPapers
DOI: 10.5593/SGEM2014/B21/S8.102

SPATIAL DYNAMIC OF SOME LACUSTRINE SALTY AREAS USING TOPOGRAPHIC AND GPS SURVEYS AND GIS ANALYSIS IN TRANSYLVANIA, ROMANIA – CASE STUDY

M. Alexe, G. Serban
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-10-0 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 1, 793-800 pp

ABSTRACT
Using modern techniques in both topography and global positioning, along with data processing in adequate GIS mapping software, there were identified a particularly great spatial and temporal dynamic of the ancient salt exploitation areas in Transylvania. The appearance or disappearance of some anthroposaline or karstosaline lacustrine units happens frequently and it is specific to diapiric structures in regions with former salt mines. In Ocna Şugatag (Maramureş County) we have observed the disappearance of some karstosaline lakes and the spatial development of anthroposaline lakes. On the other hand, in the case of Ocna Mureş (Alba County), there was a remarkable evolution because we have found the largest anthroposaline lake in Romania, which appeared out of the junction of more than two individual lakes. In both cases, the accelerated dynamic of lacustrine areas has been determined by the persistence of salt dissolution processes and established by comparing old cartographic representations with the latest data obtained using GPS and topographic surveys. The analysis and interpretation of spatial data and data attributes made possible the design of integrator drawings for both studied areas with the following elements: location of old exploitation mines, outlines of ancient and existing lacustrine units, dwellings in the sensitive areas of old exploitations etc. On the basis of these elements we have considered important the establishment of vulnerable areas for localities situated near the lakes and terrains covering the exploitation chambers. Taking into consideration these aspects we believe that it is required an intensification of research and monitoring of the areas with high levels of risks.

Keywords: dynamic, salt lake, topography, GIS, vulnerability.

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