7 research outputs found

    Comportement de la pollution de l'atmosphÚre et des précipitations par les pesticides (organochlorés, triazines et phénylurées) en Ile de France

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    The concentrations of organochlorinated insecticides and herbicides (triazines, phenylureas) were determined in the atmosphere and in the total fallout in the Paris area in 1992 and 1993. Compared to prior results in that area, there were no changes of pollution levels by organochlorines. Lindane, atrazine and simazine were the main pesticides found in the vapour phase and in the fallout. No difference in the diversity and in the abundance of the pesticides introduced by the atmosphere was observed between the rural and the urban stations. The pollution level of atrazine was close to that found in Europe and in North America, while the organochlorine and the simazine levels were higher. / Les concentrations en insecticides organochlorés et en herbicides (triazines, phénylurées) ont été déterminées dans l'atmosphÚre et dans les retombées totales en région parisienne en 1992 et 1993. Sur le moyen terme on n'observe pas d'évolution de cette pollution par rapport aux travaux antérieurs dans cette région. Le lindane, l'atrazine et la simazine sont les principaux pesticides présents en phase vapeur et dans les retombées. Les deux stations ne présentent pas en général de différence dans la diversité et l'abondance des pesticides apportés par l'atmosphÚre. Le niveau de pollution par l'atrazine est proche de celui déterminé sur le continent nord américain, contrairement à ceux en organochlorés et en simazine qui sont ici plus élevés

    Broad-scale soil monitoring schemes

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    Soil resources provide many important ecosystem goods and services. However, they are at risk from a variety of threats operating over a broad range of scales. Political awareness that soil is threatened by increasing pressures has been rising for several years (European Commission 2006). Indeed, the demand for soil information is increasing continuously (Richer de Forges and Arrouays 2010). Although rates of soil degradation are often slow and only detectable over long timescales, they are often irreversible. Therefore, monitoring soil quality and condition is essential in order to detect adverse changes in their status at an early stage
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