Publications des scientifiques de l'IRD

Zribi Mehrez, Gorrab A., Baghdadi N. (2014). A new soil roughness parameter for the modelling of radar backscattering over bare soil. Remote Sensing of Environment, 152, p. 62-73. ISSN 0034-4257.

Titre du document
A new soil roughness parameter for the modelling of radar backscattering over bare soil
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000343392200006
Auteurs
Zribi Mehrez, Gorrab A., Baghdadi N.
Source
Remote Sensing of Environment, 2014, 152, p. 62-73 ISSN 0034-4257
The characterisation of soil surface roughness is a key requirement for the correct analysis of radar backscattering behaviour. It is noteworthy that an increase in the number of surface roughness parameters in a model also increases the difficulty with which data can be inverted for the purposes of estimating soil parameters. In this paper, a new description of soil surface roughness is proposed for microwave applications. This is based on an original roughness parameter, Zg, which combines the three most commonly used soil parameters: root mean surface height, correlation length, and correlation function shape, into just one parameter. Numerical modelling, based on the moment method and integral equations, is used to evaluate the relevance of this approach. It is applied over a broad dataset of numerically generated surfaces characterised by a large range of surface roughness parameters. A strong correlation is observed between this new parameter and the radar backscattering simulations, for the HH and VV polarisations in the C and X bands. It is proposed to validate this approach using data acquired in the C and X bands, at several agricultural sites in France. It was found that the parameter Zg has a high potential for the analysis of surface roughness using radar measurements. An empirical model is proposed for the simulation of backscattered radar signals over bare soil.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Pédologie [068] ; Bioclimatologie [072] ; Télédétection [126]
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010062643]
Identifiant IRD
fdi:010062643
Contact