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DYNAMIQUES RÉCENTES DES SEBKHAS LITTORALES DE L'ARCHIPEL DES KERKENNAH (TUNISIE CENTRO-MÉRIDIONALE) : APPORT DE LA TÉLÉDÉTECTION

Abstract : Observations of climate change since the 50’s in the Mediterranean area show modifications of the precipitation’s pattern (inter and intra annual variability is more important), an elevation of the sea level, and a rise of temperatures and ETR. In this context of environmental changes, two Landsat 5 TM images, recorded in 18/06/1984 and 29/06/2011, have been studied to estimate land cover changes in Kerkennah islands. Supervised classifications (software ENVI) on all spectral bands allowed the definition of 7 identical classes for the 1984 image and 8 for 2011. Maps of the surfaces thus obtained have been crossed to detect a potential evolution tendency. Among the different types of land observed, we focused on the sebkhas, low and salty areas under the influence of the sea and which show a significant evolution. Between 1984 and 2011, they have indeed shown a strong increase tendency concerning surface (+20%). Finally, we will discuss the impact of climate change and human action on the archipelago’s environment.
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Lucile Étienne, Salem Dahech, Gérard Beltrando, Abdelkarim Daoud. DYNAMIQUES RÉCENTES DES SEBKHAS LITTORALES DE L'ARCHIPEL DES KERKENNAH (TUNISIE CENTRO-MÉRIDIONALE) : APPORT DE LA TÉLÉDÉTECTION. Teledetection, Editions des Archives Contemporaines / Editions scientifiques GB / Gordon and Breach Scientific Publishers, 2012, 11 (1), p.273-281. ⟨halshs-01134169⟩

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