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See detailGIS-Based Landslide Susceptibility Mapping in the Great Lakes Region of Africa, Case Study of Bujumbura Burundi
Nibigira, L.; Draidia, Salah ULg; Havenith, Hans-Balder ULg

in Engineering Geology for Society and Territory-Volume 2 (2015)

Abstract: Landslides in Central Africa represent a constant threat to the population. The present work took its motivation from the increasing number of recorded incidents in recent times. It is focused ... [more ▼]

Abstract: Landslides in Central Africa represent a constant threat to the population. The present work took its motivation from the increasing number of recorded incidents in recent times. It is focused on the analysis of mass movements in a regional context. Remote sensing based on the use of satellite images (Pleiades images of 2011) and aerial photographs (1957, 1958 and 1981) allowed us to identify instabilities at different scales. The study of these mass movements and the characterization of the processes governing ... [less ▲]

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See detailA GIS-based model of the distribution of the rare liverwort Aneura maxima at the landscape scale for an improved assessment of its conservation status
Vanderpoorten, Alain ULg; Sotiaux, André ULg; Engels, Patrick ULg

in Biodiversity & Conservation (2006), 15(3), 829-838

Testing whether rare species are limited by narrow habitat conditions from correlations between species occurrence and measured environmental factors is usually hampered by the lack of statistical power ... [more ▼]

Testing whether rare species are limited by narrow habitat conditions from correlations between species occurrence and measured environmental factors is usually hampered by the lack of statistical power associated to the low number of observations. Aneura maxima is an exceedingly rare liverwort in Europe whose recent discovery precluded the inclusion within the Red Data Book of European bryophytes. A series of new observations resulting from intensive bryophyte grid-mapping at the border between France and Belgium allowed the statistical investigation of the factors accounting for its distribution at the landscape scale. The species was systematically observed in deep ravines on damp, loamy soils under light tree cover within broadleaf woodlands. These conditions differ from those of other European localities, suggesting that A. maxima is not limited by a narrow ecological range. Attempting to predict the occurrence of A. maxima at the landscape scale from data on land use and soil conditions resulted in a model where the species was actually observed in only a half of the squares where its probability of occurrence was the highest. The species thus does not seem to have colonized all its potential habitats, which may be explained by the poor dispersal ability of this dioecious, rarely fertile species. Given the relative frequency of A. maxima in the Semois river basin, but taking into account its seemingly low dispersal ability and its preference for swampy habitats that are threatened by draining and spruce plantations, a status as 'conservation dependent' to 'near threatened' within the category 'lower risk' is proposed. [less ▲]

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See detailA GIS-based survey for the conservation of bryophytes at the landscape scale
Vanderpoorten, Alain ULg; Sotiaux, André ULg; Engels, Patrick ULg

in Biological Conservation (2005), 121(2), 189-194

Geographical information system (GIS) data on landscape features and land use were collected to predict bryophyte diversity and conservation value in order to determine the factors that favour bryophytes ... [more ▼]

Geographical information system (GIS) data on landscape features and land use were collected to predict bryophyte diversity and conservation value in order to determine the factors that favour bryophytes at a large geographical scale and propose the relevant conservation measures. Total species diversity and diversity in species of high conservation value were highly correlated, and the landscape features promoting them were the proportion of military lands, steep slopes, and broadleaf woodland. Military lands seemed to be especially important for the conservation of endangered species highly specialized to open habitats maintained by the appropriate level of disturbance. Woodland cover was also as a key factor for bryophyte diversity but landscape heterogeneity, such as steep slopes with a range of contrasting ecological conditions, was required to reach the highest species numbers. The GIS-based approach presented here may help focusing the attention on sites exhibiting the appropriate landscape features in terms of conservation, which is especially relevant in the context of the European network 'Natura 2000' for designating, conserving, and managing the sites of high biological value. (C) 2004 Elsevier Ltd. All rights reserved. [less ▲]

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See detailUn gisement de Pyritoshaera barbaria dans le Cambrien de la vallée du Bayehon (Ardennes Belges)
Duchesne, Jean-Clair ULg

in Annales de la Société Géologique de Belgique (1962), 86

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See detailLES GISEMENTS D'ARGILES DE LA REGION DE MARRAKECH, MAROC
El Boudour El Idrissi, Hicham ULg; Daoudi, Lahcen; Fagel, Nathalie ULg

Poster (2013, May 08)

L'argile est une matière première abondante à la surface de la Terre. En raison de ces propriétés physico-chimiques, elle possède une grande variété d'utilisations. Le Maroc est l'un des plus grands ... [more ▼]

L'argile est une matière première abondante à la surface de la Terre. En raison de ces propriétés physico-chimiques, elle possède une grande variété d'utilisations. Le Maroc est l'un des plus grands consommateurs au monde d'argiles, cependant, le domaine majoritaire d’utilisation d’argiles est celui de la céramique. Dans la région de Marrakech, les argiles sont surtout utilisées dans les domaines de basse classe tels que la céramique traditionnelle et la poterie. Jusqu’à présent très peu d’études sont effectués pour valoriser ces argiles. C’est dans cet objectif que s’inscrit l’étude que nous menons sur les argiles du Haut Atlas de Marrakech ; le présent travail a pour objectif de dresser un inventaire des principaux gisements d’argiles de cette région. Les séries du Primaire (en particulier le Viséen) de la région de Marrakech ne sont pas assez altérées pour exploiter les argiles, tel est le cas de la région de Benhmed qui approvisionne les usines céramiques de la région de Settat. Dans les formations triasiques, malgré l'épaisseur et l'apparence argileuse des séries, seuls quelques gisements d'argiles y sont exploités pour la poterie. Les faciès triasiques, riches en illite, sont en effet silteux et assez pauvres en argiles à l'exception de quelques niveaux très minces. Ces argiles sont utilisées au niveau d’Ourika pour la fabrication d’ustensiles rustiques, pots de terre et objets ornementaux. Ces argiles peuvent également constituées des matières premières pour l’élaboration de briques et de substrats pour le revêtement des murs et des sols. Les argiles des formations jurassiques et crétacées sont assez riches en carbonates, ce qui ne convient pas à leur utilisation dans l’industrie céramique. Les séries du Paléocène et de l’Eocène de toute la région sont riches en argiles fibreuses non exploitées, surtout la palygorskite (argile avec de grandes propriétés physiques), ce qui donne des perspective d’utilisation dans des différents domaines industriels. Le Mioplicoène largement développé au pied du Haut Atlas est surtout connu par sa richesse en smectite, plus particulièrement dans la région de Tassaout. En ce qui concerne les séries quaternaires, certains niveaux d’alluvions sont exploités dans la région pour l’industrie céramique (site potier de Tamsloht, Briqueterie Menara,…). Dans la région de Bouchane, le sol quaternaire est considéré comme la seule source d’argiles et d’ustensiles dans cette zone. Enfin des dépôts actuels sont également exploités (limons des oueds Tensift et N’fis, canal la Rocade) pour la fabrication de briques de murailles ou additionnés à d’autres argiles pour augmenter la consistance des pâtes céramiques. [less ▲]

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See detailLes gisements d'oxydes de fer et titane dans les roches anorthositiques du Rogaland (Norvège méridionale)
Duchesne, Jean-Clair ULg

in Colloque scientifique international Eugène Raguin (1973)

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See detailGISER - Gestion intégrée Sol Erosion Ruissellement - rapport d'activités année 1
Pineux, Nathalie ULg; Maugnard, Alexandre; Demarcin, Pierre ULg et al

Report (2012)

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See detailGISER - Gestion intégrée Sol Erosion Ruissellement - rapport d'activités année 2
Pineux, Nathalie ULg; Maugnard, Alexandre; Demarcin, Pierre ULg et al

Report (2013)

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See detailGISER - Gestion intégrée Sol Erosion Ruissellement - rapport d'activités année 3
Bielders, Charles; Degré, Aurore ULg; Demarcin, Pierre ULg et al

Report (2014)

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See detailGismondi, Ernesto
Prina, Daniela ULg

in Atkinson, Harriet; Edwards, Clive; Kettley, Sarah (Eds.) et al Encyclopedia of Design (in press)

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See detailGîtologie sédimentaire, notes de travaux pratiques 2012
Denayer, Julien ULg

Learning material (2012)

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See detailGiuliano Gasparri, Il cartesianismo di René Fedé
Dubouclez, Olivier ULg

in Bulletin cartésien (2005)

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See detailGiulio Massimilla (ed.), Callimaco, Aitia. Libro terzo e quarto, «Biblioteca di studi antichi» 92, Pisa/Roma, Fabrizio Serra editore, 2010.
Caneva, Stefano ULg

in Athenaeum : Studii Periodici di Letteratura e Storia (2013), 101.I-II

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See detailGiuseppe Antonio Borgese viaggiatore perenne
de Seta, Ilaria ULg

in Boria, Risso, Monica, Linda (Ed.) Laboratorio di nuova ricerca. Investigating Gender, Translation & Culture in Italian Studies (2007)

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See detail"Give me sum..." - Hubert Sumlin
Sacré, Robert ULg

Article for general public (1976)

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See detailGiven to a Deity? Religious and Social Reappraisal of Human Consecrations in the Hellenistic and Roman East
Caneva, Stefano ULg; Delli Pizzi, Aurian ULg

in Classical Quarterly (2015)

Various cases of human beings ‘dedicated’ to deities are attested in Greek epigraphic evidence. Are these kinds of offerings comparable to the dedication of inanimate objects? Besides, does the fact that ... [more ▼]

Various cases of human beings ‘dedicated’ to deities are attested in Greek epigraphic evidence. Are these kinds of offerings comparable to the dedication of inanimate objects? Besides, does the fact that someone is said to be ‘sacred’ to a specific deity necessarily involve that he went through a process of dedication? This article aims at providing a global picture of different situations in which processes of dedications took place. Among the several issues that are tackled, the cornerstone of this article consists of two questions: for what purposes did some people decide to consecrate a human being to a deity and what were the consequences for the consecrated individuals on religious and social levels? Different categories of persons will be contrasted, in terms of processes through which they acquire their new status but also in terms of the freedom/lack of freedom which is conveyed by this new status. It will also be shown that, as far as method is concerned, it is necessary to complete a lexical analysis with a contextual perspective for a deeper understanding of the problem. [less ▲]

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See detailGivetian brachiopods from the Trois-Fontaines Formation at Marenne (Belgium, Dinant Synclinorium)
Godefroid, Jacques; Mottequin, Bernard ULg

in Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre (2005), 75

The brachiopods sampled from the Trois-Fontaines Formation in the Marenne quarry are mainly represented by two species: Spinatrypina (Spinatrypina) fontis n. sp. and Eifyris socia n. sp. Orthid ... [more ▼]

The brachiopods sampled from the Trois-Fontaines Formation in the Marenne quarry are mainly represented by two species: Spinatrypina (Spinatrypina) fontis n. sp. and Eifyris socia n. sp. Orthid, rhynchonellid, spiriferid and terebratulid brachiopods are also present but much rarer. Among them a new species, Bornhardtina equitis n. sp., is described, the others being only briefly discussed. [less ▲]

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See detailGivetian megaspores from Libya and Belgium
Steemans, Philippe ULg; Breuer, P.; Gerrienne, Philippe ULg et al

Conference (2007)

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See detailA Givetian tintinnid-like palynomorph from Libya.
Steemans, Philippe ULg; Breuer, P.; Ville de Goyet, F. de et al

in Review of Palaeobotany and Palynology (2014), ?

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See detailGivetian-Frasnian phytogeography of Euramerica and Western Gondwana based on Miospore distribution.
Streel, Maurice ULg; Fairon-Demaret, M; Loboziak, S

in Special Publication - Geological Society of London (1990), 12

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