EUSAR 2014
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Soil moisture mapping in a semi-arid region, based on ASAR/Wide Swath satellite data

Conference: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
06/03/2014 - 06/05/2014 at Berlin, Germany

Proceedings: EUSAR 2014

Pages: 4Language: englishTyp: PDF

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Authors:
Zribi, Mehrez (CESBIO (CNRS/UPS/IRD/CNES), France)
Kotti, Fatma; Amri, Rim (INAT/Universite de Carthage, Tunisia)
Baghdadi, Nicolas (IRSTEA, UMR TETIS, France)

Abstract:
In this paper, an operational algorithm is proposed for the mapping of surface moisture over a site in North Africa. A change detection approach is applied, using 160 Envisat ASAR Wide Swath images acquired over a 7-year period. Parameterization of this algorithm is considered for three classes of vegetation cover density (NDVI<0.25, 0.250.5), retrieved from SPOT-VGT decadal images. A relative soil moisture index, ranging between 0 and 1, is proposed for each date, with a resolution of 1 km. The retrieved soil moistures are validated by means of ground measurements, as well as ERS and ASCAT soil moisture products.