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See detailTélédétection spatiale de l'occupation du Sol en Wallonie
Bonnet, Stéphanie ULiege; Brogna, Delphine; Piron, Julie et al

Report (2010)

1- Analyse de la qualité radiométrique de la couche ORTHOS_DGA (Unité de Géomatique) 2-Mise au point d’une stratégie d’acquisition d’images HR destinées à être utilisées en complément de la couche ORTHOS ... [more ▼]

1- Analyse de la qualité radiométrique de la couche ORTHOS_DGA (Unité de Géomatique) 2-Mise au point d’une stratégie d’acquisition d’images HR destinées à être utilisées en complément de la couche ORTHOS_DGA (Unité de Géomatique) -3 Production d’une couche de différence d’altitude entre le MNS_DGA et un MNT (Unité de Géomatique - GRFMN) 4- Préparation d’une base de données d’objets de référence (GRFMN) 5- Mise au point des procédures de segmentation d’images (GRFMN) 6- Préparation de la base de données « images » (GRFMN) 7- Analyses thématiques (GRFMN – Unité de Géomatique) 8- Intégration des données produites dans la base de données géographique de la Région wallonne (Unité de Géomatique - GRFMN) 9- Recommandations pour les réalisations des futures couches « image satellitale HR » de la Wallonie (Unité de Géomatique - GRFMN) [less ▲]

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See detailContribution à l'étude du climat de trois cavités souterraines belges
Piron, Julie; Erpicum, Michel ULiege; Ek, Camille ULiege et al

in Bulletin de la Société Royale Belge d'Etudes Géologiques et Archéologiques "Les Chercheurs de Wallonie" (2007), XLVI

Some temperature and CO2 measures have been made for one year in the cave of Ramioul and in the cave of Comblain-au-Pont, and for six months in the underground quarry of Petit-Lanaye inférieure ... [more ▼]

Some temperature and CO2 measures have been made for one year in the cave of Ramioul and in the cave of Comblain-au-Pont, and for six months in the underground quarry of Petit-Lanaye inférieure. Temperature has been measured by dataloggers. These measures and the comparison between the different caves contributed to a better understanding of their climates. In the cave of Ramioul, closed by non insulated doors, the air movements are relatively low but there are some heat exchanges between the outside and inside air by conduction through the doors. The cave can be divided into two parts each with a different climatic behaviour. High and dangerous CO2 rates have already been measured in this cave. Rates fluctuate in an irregular way and without any connection with the natural seasonal cycle, and the CO2 origins stay uncertain. The cave of Comblain-au-Pont can be divided into two major parts: one enclosed and the other ventilated. The ventilated region is a “wind tube” during the winter, but it doesn’t reverse in the summer. On a larger scale, this region can be considered as a cold air trap despite its two exits, since it has a descendant morphology. <br />In the underground carry of Petit-Lanaye inférieure, the low number of data doesn’t allow a complete diagnosis of the climate organisation, but can give a first idea for the summer period. We can already distinguish some parts that are more or less influenced by the outside temperature fluctuations, probably in relation with some air movements which organised <br />themselves in a complex way in the labyrinthic galleries network. [less ▲]

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