MONITORING VEGETATION AREAS THROUGH SATELLITE IMAGES. NDVI IN SOUTHERN PART OF OLTENIA PLAIN (LEU-ROTUNDA AND DABULENI AREAS)

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 761-768 pp

ABSTRACT
Detection of environmental change using satellite imagery and ArcGIS software in an area with agricultural use, affected by atmospheric drought, deforestation and destruction of the irrigation system proved to be important for observing trends in changes over time. Fields Leu-Rotunda and Dăbuleni (Plain of Oltenia), located in southern Romania, represent vast stretches of plains, with sandy soil texture of low fertility and high thermal conductivity. The humus content being 0,2-0,9%, and the plants wilting coefficient ranging from 1,1 to 2,1%. The maximum temperature of the air in July 1993 reached 42,8 º C and 69,5 ºC at the surface of the soil in July 2002. The impact of the climatic elements were detected with the help of satellite images, using the statistical and mathematical method (NDVI). The timing was the month of maximum water requirement, the month of July. In the same month, different conditions have been observed with significant differences of affected polygons for the years 1987, 1993, 2006, 2007 and 2009.

Keywords: Fields Leu-Rotunda and Dăbuleni (Plain of Oltenia), sands, atmospheric drought, NDVI, affected areas.