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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Analysis of TerraSAR-X data sensitivity to bare soil moisture, roughness, composition and soil crust
Remote Sensing of Environment, Volume 115, No. 8, Year 2011
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Description
Soils play a key role in shaping the environment and in risk assessment. We characterized the soils of bare agricultural plots using TerraSAR-X (9.5. GHz) data acquired in 2009 and 2010. We analyzed the behavior of the TerraSAR-X signal for two configurations, HH-25° and HH-50°, with regard to several soil conditions: moisture content, surface roughness, soil composition and soil-surface structure (slaking crust).The TerraSAR-X signal was more sensitive to soil moisture at a low (25°) incidence angle than at a high incidence angle (50°). For high soil moisture (>25%), the TerraSAR-X signal was more sensitive to soil roughness at a high incidence angle (50°) than at a low incidence angle (25°).The high spatial resolution of the TerraSAR-X data (1. m) enabled the soil composition and slaking crust to be analyzed at the within-plot scale based on the radar signal. The two loamy-soil categories that composed our training plots did not differ sufficiently in their percentages of sand and clay to be discriminated by the X-band radar signal.However, the spatial distribution of slaking crust could be detected when soil moisture variation is observed between soil crusted and soil without crust. Indeed, areas covered by slaking crust could have greater soil moisture and consequently a greater backscattering signal than soils without crust. © 2011 Elsevier Inc.
Authors & Co-Authors
Aubert, M.
France, Montpellier
Territoires, Environnement, Télédétection et Information Spatiale
Baghdadi, Nicolas N.
France, Montpellier
Territoires, Environnement, Télédétection et Information Spatiale
Zribi, Mehrez
France, Toulouse
Center for Space Studies of the Biosphere
Douaoui, A. El Kader
Algeria, Khemis Miliana
Université Djilali Bounaama Khemis Miliana
Loumagne, C.
France, Antony
Ur Hban Hydrosystèmes et Bioprocédés
Baup, F.
France, Toulouse
Center for Space Studies of the Biosphere
el-Hajj, Mohammad M.
France, Toulouse
Noveltis
Garrigues, S.
France, Paris
Cnes Centre National D'etudes Spatiales
Statistics
Citations: 139
Authors: 8
Affiliations: 6
Identifiers
Doi:
10.1016/j.rse.2011.02.021
ISSN:
00344257
Study Design
Cohort Study