TECHNICAL NOTE: TEMPORARY EVOLUTION OF DEFORESTATION AND CROP EXPANSION FROM 1984 TO 2010 IN THE SUB-BASIN OF THE URUÇUÍ-PRETO RIVER, PIAUÍ, BRAZIL - DOI: 10.13083/1414-3984.v22n03a08

Authors

  • João Batista Lopes Silva
  • Weslem Lima Ferreira
  • Karla Nayara Santos Almeida
  • Kaise Barbosa Souza
  • Julio Cezar Azevedo Nobrega

DOI:

https://doi.org/10.13083/reveng.v22i3.523

Keywords:

agricultura, degradação do cerrado, sensoriamento remoto

Abstract

This work sought to quantify the evolution of deforested and crop areas between the years 1984 and 2010 in the sub-basin of the Uruçuí-Preto river, Brazil. The study was carried out using images of the Landsat 5 TM satellite for the years 1984, 1990, 1996, 2000, 2006 and 2010. Analysis was performed by automatic supervised classification using the maximum likelihood algorithm with the following classes: Savannah, Caatinga, Riparian Forest, Burnt, Exposed Soil/Crop area. The Savannah was heavily degraded during this period, with an area reduction of 44.45% (1,770.89 km2); the Exposed Soil/Crop area in 1984 was 304.59 km2, while in 2010 the area for this class was 2305.49 km2, correspond to 44% of the total basin area. Thus, increase in the sum of the Crop and Exposed Soil areas from 1984 to 2010 was around 539%.

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Published

2014-07-03

How to Cite

Silva, J. B. L., Ferreira, W. L., Almeida, K. N. S., Souza, K. B., & Nobrega, J. C. A. (2014). TECHNICAL NOTE: TEMPORARY EVOLUTION OF DEFORESTATION AND CROP EXPANSION FROM 1984 TO 2010 IN THE SUB-BASIN OF THE URUÇUÍ-PRETO RIVER, PIAUÍ, BRAZIL - DOI: 10.13083/1414-3984.v22n03a08. Engineering in Agriculture, 22(3), 254–261. https://doi.org/10.13083/reveng.v22i3.523

Issue

Vol. 22 No. 3 (2014)

Section

Water and environmental resources

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