Estimación de variables biofísicas del pastizal en un ecosistema de dehesa a partir de espectro-radiometría de campo e imágenes hiperespectrales aeroportadas

  1. Melendo-Vega, J. R.
  2. Martín, M. P.
  3. Vilar del Hoyo, L.
  4. Pacheco-Labrador, J.
  5. Echavarría, P.
  6. Martínez-Vega, J.
Revista:
Revista de teledetección: Revista de la Asociación Española de Teledetección

ISSN: 1133-0953

Any de publicació: 2017

Número: 48

Pàgines: 13-28

Tipus: Article

DOI: 10.4995/RAET.2017.7481 DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Revista de teledetección: Revista de la Asociación Española de Teledetección

Objectius de Desenvolupament Sostenible

Resum

The aim of this paper is the estimation of biophysical vegetation parameters from its optical properties. The variables Fuel Moisture Content (FMC), Canopy Water Content (CWC), Leaf Area Index (LAI), dry matter (Cm) and AboveGround Biomass (AGB) were estimated in the laboratory from vegetation samples collected simultaneously with the acquisition of spectral data from the Compact Airborne Spectrographic Imager (CASI) sensor and the field spectroradiometer ASD FieldSpec® 3. Spectral vegetation indices found in the literature were computed from hyperspectral data. Their linear relationships with the biophysical variables measured in the field were analysed. Results show consistent relationships between analysed biophysical parameters and spectral indices, mainly those using SWIR and red-egde bands which reveal the importance of these spectral regions for the estimation of biophysical variables in herbaceous covers. Determination coefficients (R2) above 0.91 and RRMSE of 21.4% have been obtained for the spectral indexes calculated whit ASD data, and 0.91 R2 and RRMSE of 15.5% for the spectral indexes calculated whit CASI data.

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