Modeling biophysical parameters for the development of algorithm for the assessment and mapping of desertification risk

Authors

  • HELIO LEANDRO LOPES Universidade Federal do Vale do São Franscisco
  • ANA LUCIA BEZERRA UFPE
  • LUCIANO JOSÉ DE OLIVEIRA EMBRAPA
  • MARIA DO CARMO SOBRAL UFPE

DOI:

https://doi.org/10.5380/bcg.v15i4.16286

Keywords:

Modelagem Ambiental, Degradação da Caatinga, Indices de Vegetação, Sensoriamento Remoto.

Abstract

The interaction of sustainable actions to integrate social, environmental and economical programs to quantify and qualify the degrees of degradation is of vital importance in areas of risk of desertification. This research presents the application
of biophysical parameters and erosion potential to evaluate environmental degradation processes and to identify areas  at risk of desertification. The paper presents a general approach that can be used in other areas with similar biophysical characteristics. The model was based on the following parameters: albedo, emissivity, temperature, NDVI, soil heat flux, soil erosivity, soil erodibility and LS (slope length and slope or topographic factor). The model was implemented by using the LEGAL programming language available in the SPRING 4.0 Geographical Information System software package. Multitemporal images of TM sensor from the dry season were used to model and to apply the algorithm for mapping and evaluating the degradation evolution in the study area. The results
showed an increasing in the degree of degradation (caatinga vegetation removal, followed by soil erosion), demonstrating the potential of the model to assess desertification risks. 

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Published

2009-12-09

How to Cite

LOPES, H. L., BEZERRA, A. L., DE OLIVEIRA, L. J., & SOBRAL, M. D. C. (2009). Modeling biophysical parameters for the development of algorithm for the assessment and mapping of desertification risk. Bulletin of Geodetic Sciences, 15(4). https://doi.org/10.5380/bcg.v15i4.16286

Issue

Vol. 15 No. 4 (2009)

Section

Article

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