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See detailGeorges Simenon. Un romancier pour aujourd'hui ?
Dumortier, Jean-Louis ULg

Book published by Labor (2003)

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See detailLes géosites d'Ampsin et d'Engis (Belgique) : deux exemples de reconversion de carrières désaffectées
Barchy, Laurent; Chevalier, Emmanuel; Marion, Jean-Marc ULg et al

in Blieck, A.; Auguste, P.; Derycke, C. (Eds.) Programme et résumés (2011, October)

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See detailGeospatial Information in Hydrogeological Studies
Wojda, Piotr; Brouyère, Serge ULg; Dassargues, Alain ULg

in Anderson, M. G. (Ed.) Encyclopedia of Hydrological Sciences (2010)

The purpose of this article is to make a review of hydrogeological information modeling objectives, techniques, and problems, and finally to propose a solution for data integration and transfer ... [more ▼]

The purpose of this article is to make a review of hydrogeological information modeling objectives, techniques, and problems, and finally to propose a solution for data integration and transfer. Hydrogeological data and information management is crucial for efficient integrated water resources administration, protection, and exploitation. To assure an effective management of groundwater resources, a close cooperation and information exchange between different actors at different levels is necessary. The information flux must be optimized between local producers and potential users of hydrogeological data: regional and national institutions, as well as international and transboundary analysts and managers. The paper format of representation and exchange of hydrogeological information has already been replaced by different digital forms. However, an enormous diversity in applied formats and representations makes hydrogeological information extremely difficult to transfer in an automatic way. If this transition is not effective, misinterpretations of hydrogeological data may appear. The proposed solution consists in creating a domain-specific standard for the hydrogeological information exchange, using recent geomatics advances, taking into consideration appropriate ISO/TC211 and Open Geospatial Consortium (OGC) geographic information standards. Such a new electronic carrier of hydrogeological information facilitates a dialogue between interested parties using web services and inbuilt exchange mechanisms, interdisciplinary collaboration, and international harmonization of environmental sciences. [less ▲]

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See detailGeostatistical analysis of primary and secondary data in a sandy aquifer at Mol/Dessel (Belgium)
Rogiers, Bart; Mallants, Dirk; Batelaan, Okke et al

in Cokx, L.; Van Meirvenne, M.; Bogaert, P. (Eds.) et al 8th International Conference on Geostatistics for Environmental Applications (GeoENV2010) (2010, September)

In the framework of the disposal of short-lived low- and intermediate-level radioactive waste in a near-surface disposal facility in Dessel, Belgium, additional extensive site characterization has been ... [more ▼]

In the framework of the disposal of short-lived low- and intermediate-level radioactive waste in a near-surface disposal facility in Dessel, Belgium, additional extensive site characterization has been performed in 2008. The gathered data now enclose 388 hydraulic conductivity measurements on samples of 8 cored boreholes. Secondary information as grain size analysis, porosity, and borehole geophysical parameters was also gathered. In addition, the geology of the study area has also been thoroughly characterized by a set of 178 cone penetration tests (CPTs) to approximate 50 m depth. This dataset allowed to refine the hydrostratigraphical model of the region. The existing groundwater model, based on large-scale effective hydraulic properties, was updated accordingly. The next step is a small-scale probabilistic approach 1) to validate the current existing deterministic groundwater models and 2) to support design for a monitoring network. In preparation for stochastic realizations of the subsurface, a geostatistical analysis of the available primary and secondary data is performed. [less ▲]

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See detailGeostatistical interpolation of daily rainfall at catchment scale: the use of several variogram models in the Ourthe and Ambleve catchments, Belgium
Ly, Sarann ULg; Charles, Catherine ULg; Degre, Aurore ULg

in Hydrology & Earth System Sciences (2011), 15(7), 2259-2274

Spatial interpolation of precipitation data is of great importance for hydrological modelling. Geostatistical methods (kriging) are widely applied in spatial interpolation from point measurement to ... [more ▼]

Spatial interpolation of precipitation data is of great importance for hydrological modelling. Geostatistical methods (kriging) are widely applied in spatial interpolation from point measurement to continuous surfaces. The first step in kriging computation is the semi-variogram modelling which usually used only one variogram model for all-moment data. The objective of this paper was to develop different algorithms of spatial interpolation for daily rainfall on 1 km2 regular grids in the catchment area and to compare the results of geostatistical and deterministic approaches. This study leaned on 30-yr daily rainfall data of 70 raingages in the hilly landscape of the Ourthe and Ambleve catchments in Belgium (2908 km2). This area lies between 35 and 693 m in elevation and consists of river networks, which are tributaries of the Meuse River. For geostatistical algorithms, seven semi-variogram models (logarithmic, power, exponential, Gaussian, rational quadratic, spherical and penta-spherical) were fitted to daily sample semi-variogram on a daily basis. These seven variogram models were also adopted to avoid negative interpolated rainfall. The elevation, extracted from a digital elevation model, was incorporated into multivariate geostatistics. Seven validation raingages and cross validation were used to compare the interpolation performance of these algorithms applied to different densities of raingages. We found that between the seven variogram models used, the Gaussian model was the most frequently best fit. Using seven variogram models can avoid negative daily rainfall in ordinary kriging. The negative estimates of kriging were observed for convective more than stratiform rain. The performance of the different methods varied slightly according to the density of raingages, particularly between 8 and 70 raingages but it was much different for interpolation using 4 raingages. Spatial interpolation with the geostatistical and Inverse Distance Weighting (IDW) algorithms outperformed considerably the interpolation with the Thiessen polygon, commonly used in various hydrological models. Integrating elevation into Kriging with an External Drift (KED) and Ordinary Cokriging (OCK) did not improve the interpolation accuracy for daily rainfall. Ordinary Kriging (ORK) and IDW were considered to be the best methods, as they provided smallest RMSE value for nearly all cases. Care should be taken in applying UNK and KED when interpolating daily rainfall with very few neighbourhood sample points. These recommendations complement the results reported in the literature. ORK, UNK and KED using only spherical model offered a slightly better result whereas OCK using seven variogram models achieved better result. [less ▲]

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See detailGéostratégie du territoire belge (1839-1914)
Bechet, Christophe ULg

Scientific conference (2010, February 23)

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See detailGeosynthetics : geotextiles, geotextiles related-products and geomembranes
Rigo, Jean-Marie ULg; Courard, Luc ULg

in Machajski, J.; Winter, J. (Eds.) Proceedings of the IV International Conference on Slope Stability and Protection (1991)

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See detailGeosynthetics: materials, design, durability and application
Courard, Luc ULg

in Application des géosynthétiques dans la géotechnique (2011, January 26)

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See detailGeotechnical and numerical studies of slope instability in loess deposits
Mamyrova, Raushan; Stahlmann, J; Bourdeau, Céline et al

in Geophysical Research Abstracts (2009)

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See detailGeotechnical properties of the Quaternary sediments in Shanghai
Dassargues, Alain ULg; Biver, Pierre; Monjoie, Albéric ULg

in Engineering Geology (1991), 31(1), 71-90

The subsoil of Shanghai is composed of Quaternary sediments of the Yangtse River estuary. The center of the city has undergone a man-induced subsidence due to water pumping in the confined multi-aquifer ... [more ▼]

The subsoil of Shanghai is composed of Quaternary sediments of the Yangtse River estuary. The center of the city has undergone a man-induced subsidence due to water pumping in the confined multi-aquifer system located in these sediments. Together with a sedimentological study of the post-Pleistocene conditions of deposition and accumulation, an accurate geotechnical study has been completed on the basis of all the available data from identification, oedometer and triaxial tests. Size analysis, X-ray analysis, compressibility characteristics, void ratio, preconsolidation pressures, permeabilities are considered taking into account the sedimentary sequence. Some relations between parameters are deduced and the hydrodynamic parameters are related to compaction parameters in order to predict their coupled and non-linear effects on the subsidence phenomena. Conclusions consist in the determination of the zones where different sensitivities to compaction are evaluated in these Quaternary formations. [less ▲]

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See detailGeotextiles – a new way of constructing quality roads at lower cost
Rigo, Jean-Marie ULg; Courard, Luc ULg

in Geotextilien für den Tiefbau (1989)

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See detailGéothermométrie par les pyroxènes et mise en place du massif anorthositique d'Egersund-Ogna (Rogaland, Norvège méridionale)
Maquil, Robert; Duchesne, Jean-Clair ULg

in Annales de la Société Géologique de Belgique (1984), 107

Microprobe analyses are presented of 62 orthopyroxene-clinopyroxene pairs from 17 samples from the Egersund-Ogna anorthositic body. Equilibrium temperatures, calculated by various opx-cpx geothermometers ... [more ▼]

Microprobe analyses are presented of 62 orthopyroxene-clinopyroxene pairs from 17 samples from the Egersund-Ogna anorthositic body. Equilibrium temperatures, calculated by various opx-cpx geothermometers (Wood and Banno, 1973; Wells, 1977), as well as the Al-contents of the pyroxenes show relative variations. The interpretation is consistent with the crystallization of the anorthosite along a PT gradient and the syn-emplacement deformation of the mass itself together with its envelope. [less ▲]

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See detailGeoTraceAgri final project report (GTA)
Debord, Michel; Chauchard, Alain; Tychon, Bernard ULg et al

Report (2005)

Are the universalisation and the globalisation of trade exchanges synonymous with a standardization in which agro-food products uprooted of their soil will no longer be differentiated from manufacturers ... [more ▼]

Are the universalisation and the globalisation of trade exchanges synonymous with a standardization in which agro-food products uprooted of their soil will no longer be differentiated from manufacturers or supermarket brands? Original food products belong to the inheritance of the territories and the consumers are attracted more and more by their authenticity. The GeoTraceAgri project resolutely supports agriculture and the sustainable promotion of the territory as opposed to universalisation which standardizes and moves away those who produce for consumers. Geotraceability aims at associating information of geographical nature with the traditional data of traceability. Farming origin and operations have become factual and verifi able data is available everywhere in the world, thus making it possible to bring additional guarantees to the signs of quality. The GeoTraceAgri (GTA) project largely contributed to the realisation of geotraceability. With the implementation from January 1,2005 of the new Common Agricultural Policy and its regulation imposing on the Member States a single system of declaration, all the agricultural parcels now form part of a European database of geographical references. This new regulation reinforces the basis of the concept of geotraceability, whereas throughout the project it was necessary to defi ne geo-indicators for integrated or crop production with very few geographical data on the farming precedents. The development of the GTA prototype rests on a decentralized architecture and Web services. It was indeed necessary to conceive a system which is readily accessible on Internet for farmers, co-operatives and collectors, and potentially with the administrations which have control responsibilities. In term of acceptability, the potential users realise the potential economic benefi ts of the concept and of the indicators of geotraceability in their plan of exploitation, on the other hand sociological acceptability is less evident which induces the need for communication to make for its adoption. This fi nal report fi nal illustrates the fi rst stage : the GeoTraceAgri partners are continuing their research on the defi nition of an integrated system of geotraceability for the Common agricultural policy and the plan of analysis of the results of GeoTraceAgri should lead to the marketing within two years of an application making it possible to integrate the geo-indicators into management software for the actors of the agro food chain. [less ▲]

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See detailGéradon-Luyckx Eddy
Tomasovic, Dick ULg

in Aubenas, Jacqueline (Ed.) Dic Doc: Dictionnaire des Documentaristes belges (1999)

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See detailGérer et contrôler la qualité des évaluations standardisées à l'aide de la plateforme open source ExAMS
Gilles, Jean-Luc ULg; Detroz, Pascal ULg

in 25ème Congrès de l'Association Internationale de Pédagogie Universitaire (AIPU) - "Le défi de la qualité dans l'enseignement supérieur : vers un changement de paradigme" (2008, May)

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See detailGérer l’ambivalence de la librairie : perspectives historiques
Durand, Pascal ULg; Winkin, Yves ULg

in Winkin, Yves (Ed.) La Librairie en Communauté française de Belgique (1997)

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See detailGérer l'hétérogénéité des élèves : Méthodes de regroupement des élèves dans l'enseignement obligatoire
Monseur, Christian ULg; Demeuse, Marc ULg

in Cahiers du Service de Pédagogie Expérimentale (SPE) (2001), (7-8), 25-52

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See detailGérer l’innovation par les TIC dans l’administration locale: un regard contrasté sur trois projets de e-administration
Lisein, Olivier ULg

Scientific conference (2006, May)

Soucieuse de répondre aux critiques qui lui sont adressées, l’administration publique développe ces dernières années plusieurs initiatives visant la modernisation de ses services. Parmi celles-ci, le ... [more ▼]

Soucieuse de répondre aux critiques qui lui sont adressées, l’administration publique développe ces dernières années plusieurs initiatives visant la modernisation de ses services. Parmi celles-ci, le recours aux TIC occupe une place prépondérante. Présentés comme la solution devant permettre à l’administration de se métamorphoser et d’accroître l’efficacité des services rendus aux citoyens, les projets de e-gouvernement et de e-administration se multiplient aux différents niveaux de pouvoir. Les administrations locales n’échappent pas à cette tendance. Si des innovations axées sur l’implémentation de projets d’administration électronique y sont concrétisées, leur succès doit néanmoins être relativisé sur de nombreux points, notamment en termes d’utilisation effective des solutions TIC. A partir de trois cas concrets, mis en œuvre dans des administrations communales belges, notre intervention a pour objectif de cerner le pourquoi de cette appropriation mitigée des projets de e-administration. L’analyse croisée de ces trois expériences au travers des différents courants de pensée entourant l’innovation technologique permet de déceler et expliquer les facteurs qui peuvent justifier le décalage existant entre les intentions de départ et les usages réels des applications mises en place. Un regard contrasté sur les trois cas étudiés permet en outre d’identifier, sur base de la théorie de la traduction, plusieurs pistes de réflexion pour l’élaboration et le pilotage de projets novateurs de ce type. [less ▲]

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See detailGérer la diversité au quotidien Cas pratiques de GRH
Cornet, Annie ULg; Warland, Philippe ULg

Book published by ATELIER DES PRESSES (2013)

CAS PRATIQUES POUR FORMATEURS ET ETUDIANTS

Detailed reference viewed: 32 (4 ULg)