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Un système d'information foncière pour gérer le risque d'inondation : expérimentation à Praia ( cap vert)

Abstract : Extreme disasters related to climate change have become an increasing research topic,particularly due to the cost of damage (economic, human, social and environmental), whichhas a negative impact on GDP and from which the poorest countries suffer most. More locally,the city of Praia, the capital of Cape Verde, has to face to various disasters, especially flashfloods. These hazards occur between July and August, following heavy rains, and tend tointensify. These floods, aggravated by the conquest of urbanized areas in high‐risk areas, invalley bottoms and steeply sloping areas, increase the level of exposure of residents. The latterare also vulnerable because someone’s live in precarious illegal habitats. In response to thissituation, this research proposes to create, test and deploy a prototype cadastral LandInformation System, with spatial reference, to propose indicators of the risk of buildings in theface of rapid flooding and to increase the knowledge of land administration. The system isstructured around two aspects: a "mobile gisweb" component, which allows electronic datacollection from the field, thus promoting the participation of households in the process ofassessing their own risk and vulnerability, while allowing in situ collection; and a "workstation"component, allowing the processing and dissemination of risk information while consideringrisk management at the city level. To do this, html, JavaScript and CSS languages and opensource technologies (Google API, PostgreSQL/PostGIS, PHP, OpenLayers 3, QGIS software,Geoserver) were used to make the tool both transposable and operational. According to thesample surveyed, the level of risk of housing in the face of rapid flooding is high (33%), and it isexplained by geographical and environmental vulnerabilities of buildings, associated with thesocio‐economic insecurity of households.
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  • HAL Id : tel-02886527, version 1

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Romualdo de Barros Correia. Un système d'information foncière pour gérer le risque d'inondation : expérimentation à Praia ( cap vert). Etudes de l'environnement. Université d'Avignon, 2019. Français. ⟨NNT : 2019AVIG1198⟩. ⟨tel-02886527⟩

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