1,721,278 research outputs found

    Desertification indicators for the European Mediterranean region: state of the art and possible methodological approaches [= Indicatori di desertificazione per il Mediterraneo europeo: stato dell'arte e proposte di metodo]

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    The Italian Environment Protection Agency (ANPA), and the Desertification Research Centre at the University of Sassary have worked jointly to provide decision-makers with an in-depth analysis of the state of the art and methodologies applicable to the evaluation of the desertification phenomenon.ANPA has promoted this important research activity, within the wider and more dynamic framework of actions it conducts in the Italian National Committee, providing its support to the definition and start up of the National Plan to Combat Desertification and Drought.The complexity of the phenomena and their causes leads to the individuation of a plurality of “actors” who might take the responsibility to carry out actions aimed at combating Desertification and Drought.Indicators represent a crucial link in the chain that, from knowledge, leads to taking decisions and promoting responsible behaviours: starting from an evaluation of the various, physical, biologic, socio-economic processes that contribute to land degradation and desertification, the goal is to individuate indicators that might prove useful in territorial planning and public information activities, and that might be a suitable answer to the request for direct knowledge of the status and evolution of the phenomenon, as well as the opportunity to take actions aimed at mitigating and, above all, preventing the occurrence of the phenomenon

    Utilización de indicadores de desertificación en los países del Anexo IV

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    Por más de un decenio la Comisión Europea ha individualizado en la Desertificación uno de los mayores problemas de Europa meridional. Varios proyectos han contribuido a individualizar y describir los principales procesos de desertificación operantes en la Región, sus causas y sus fuerzas arrastrantes. Los estudios de los años ’90 apuntaban sobre todo a la comprensión y modelización de los procesos de degradación. A partir de los años ’97 y ’98 se afirma la necesidad de desarrollar un estudio más aplicado y detallado en la individuación de indicadores en tan que instrumentos operativos para el gobierno del territorio, valorizando todos los conocimientos adquiridos. Este trabajo presenta una síntesis de los desarrollos institucionales y científicos en tema de indicadores de desertificación en los Países del Anexo IV

    Ranking desertification indicators using TOPSIS algorithm

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    Desertification is the result of natural and anthropogenic processes, leading to degradation or loss of the land’s productivity and complexity. To assess the desertification status, integrated set of indicators must be identified. Indicators must provide synthetic information on threshold levels, status and evolution of relevant physical, chemical, biological and anthropogenic processes. Multi-criteria decision-making (MCDM) is a collection of methodologies to compare, select, or rank multiple alternatives that involve incommensurate attributes. Technique for order preference by similarity to ideal solution (TOPSIS) method is a multiple criteria method to identify solutions from a finite set. TOPSIS is an algorithm for determining the most preferable choices among the possible indicators that can be developed. The aim of this paper is to introduce TOPSIS as a decision-making method for the selection and integration of desertification indicators. The simulation case study presented here is related to the selection of the best set of indicators to monitor land degradation by remote sensing in three different countries (Brazil, Mozambique and Portugal), within the framework defined by the DesertWatch Extension project
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