Mapeo de desmontes en áreas de bosque nativo de la provincia de Entre Ríos, Argentina

MALDONADO, F. W. SIONE Y P. ACEÑOLAZA

Ambiencia

UNICENTRO

Lugar: Guarapuava; Año: 2012 vol. 8 p. 523 - 532

1808 0251

The objective of this study was to evaluate the application of a methodology for detecting and monitoring forest clearance. The methodology should be unaffected to irregular image acquisition in the region of the ?Espinal? (thorn forest) in northeastern Argentina. Monitoring changes in land use and cover is needed for government policies of conservation and management of natural resources. The study area was the Department Feliciano northern of Entre Rios province. The typical vegetation is Espinal thorn forest, subjected to selective logging for extensive livestock ranching. The methodology used Landsat TM images to form a multitemporal package with spectral bands of the second date and change intensity band obtained by the RCAN technique. On this package we applied a technique ?Image segmentation by region growing? with manual seeding. Finally, the thematic aggregation based on visual interpretation was made. A total of 1680 ha cleared were detected between August 2009 and December 2010, and 1140ha cleared between December 2010 and April 2011. The segmentation of images with intensity bands change with manual seeding obtained god results for detecting forest clearing. This result was verified in situ by government agencies. Key words: Satelite images; vegetation; multitemporal; valuation; change detection.