Fetoui M. auteur aut IRD Loireau Maud auteur aut IRD Essifi B. auteur aut IRD Chouikhi F. auteur aut IRD Tarhouni M. auteur aut IRD Sghaier M. auteur aut IRD Laques A.E. auteur aut IRD Dérioz P. auteur aut IRD text journalArticle eng text/pdf reformatted digital access The need of useful information for decision-makers to fight against desertification in Tunisian dry zones leads to conceive assessing and monitoring systems that can supply synthetic indicators. These latter should integrate socioeconomic and environmental dimensions with their spatial and temporal diversity at the local scale. This paper proposes an example of information system entitled SIELO (information system for operational desertification monitoring at the local scale). This system attempts to create the link between i) spatialized indicators of desertification risks, built in connection with the systematic complexity of desertification and ii) observed Land Use/ Land Cover (LU/LC) Change. The first type of data arises from pre-existing environmental model: LEIS model (Local Environmental Information System). The second type of data is extracted from satellite images acquired according to regular time steps. The proposed approach is based also on the spatializing of knowledge, via the "landscape" tool in particular. We illustrate the feasibility and the operational effectiveness of a developed software prototype (SIELO v1.0) with an initial application in a Tunisian dry zone. This system showed that it has the capacity to feed an operational monitoring of desertification according to the state of LU/LC directly observed or measured in several dates. Then, it can be useful for the decision-makers in their programs of fighting against desertification, but also to manage uncertainties in southeastern Tunisia, especially climate variability and climate change. specialized DESERTIFICATION UTILISATION DU SOL SURFACE DU SOL TELEDETECTION SPATIALE CLIMAT OBSERVATOIRE SYSTEME D'INFORMATION GEOGRAPHIQUE AIDE A LA DECISION CHANGEMENT CLIMATIQUE GESTION DU RISQUE TUNISIE ZONE ARIDE MEDENINE 126TELAPP10 082VEGET01 6 1 art. no 1000252 [5 en ligne] 2015 2157-7617 https://www.documentation.ird.fr/hor/fdi:010071789 10.4172/2157-7617.1000252 2157-7617 [F B010071789] https://www.documentation.ird.fr/hor/fdi:010071789 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers18-02/010071789.pdf IRD - Base Horizon / Pleins textes 2018-03-05 2018-03-06 fdi:010071789 fre