Using remote sensing to determine the effects of soil burn severity on soil properties. A case study of the 2021 Sierra Bermeja fire (S. Spain)

Autores/as

  • Cristina Fernandez Filgueira Socia
  • Rafael Llorens Unidad de Cambio Global. Universidad de Valencia
  • Jose Antonio Sobrino Rogriguez Unidad de Cambio Global. Universidad de Valencia

DOI:

https://doi.org/10.31167/csecfv2i49.19930

Resumen

Assessment of the magnitude of change in soil erodibility, which varies depending on soil burn severity, is a critical step in post-fire restoration planning. Evaluation of post fire soil burn severity currently relies on field surveys, because the relationships between spectral indices and alterations in soil properties have scarcely been explored until now. A fire severity assessment was carried out after by a forest fire in October 2021 in Sierra Bermeja (S Spain). Several soil properties (mean weight diameter of soil aggregates, soil organic carbon and soil water repellency) were analyzed in relation to different levels of soil burn severity, at two soil depths (0-1 cm and 1-2 cm). In addition, for each sample plot, different spectral indices were computed using Sentinel-2 satellite data.

The mean weight diameter of soil aggregates and soil organic carbon decreased with soil burn severity in the surface layer (0-1 cm), but not at 1-2 cm depth. Soil water repellency was not observed in the soil surface at the higher levels of soil burn severity.

Burned Area Index for Sentinel-2 (BAIS2) was the best predictor of the mean weight diameter of soil aggregates and soil organic carbon. No correlations were obtained for soil water repellency.

The study findings confirm the importance of evaluating soil burn severity for planning post-fire restoration activities and show that the most significant changes in soil properties take place in the upper soil layer (0-1 cm). Although remote sensing techniques can help in the evaluation of soil burn severity, field evaluation are still required.

Citas

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Publicado

2023-09-28

Cómo citar

Fernandez Filgueira, C., Llorens, R., & Sobrino Rogriguez, J. A. (2023). Using remote sensing to determine the effects of soil burn severity on soil properties. A case study of the 2021 Sierra Bermeja fire (S. Spain). Cuadernos De La Sociedad Española De Ciencias Forestales, 49(2), 223-236. https://doi.org/10.31167/csecfv2i49.19930

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