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

被引：0
|
作者：
Zribi, Mehrez [1 ]
Kotti, Fatma [2 ]
Amri, Rim [2 ]
Baghdadi, Nicolas [3 ]
机构：
[1] CESBIO CNRS UPS IRD CNES, Toulouse, France
[2] INAT Univ Carthage, Tunis, Tunisia
[3] IRSTEA, UMR TETIS, Montpellier, France
来源：
10TH EUROPEAN CONFERENCE ON SYNTHETIC APERTURE RADAR (EUSAR 2014) | 2014年
关键词：
D O I：
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中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
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, 0.25<NDVI<0.5 and NDVI>0.5), 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.
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页数：4
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