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See detailAnnular Groove Phase Mask coronagraph in diamond for mid-IR wavelengths
Delacroix, Christian ULg; Mawet, Dimitri; Surdej, Jean ULg et al

Poster (2010, April 25)

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See detailTransformée de Hough et détection de linéaments sur images satellitaires et modèles numériques de terrain
Poncelet, Nadia ULg; Cornet, Yves ULg

in Bulletin de la Société Géographique de Liège (2010), 54

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See detailClimatological characteristics of NDVI time series: challenges and constraints
Horion, Stéphanie; Tychon, Bernard ULg; Cornet, Yves ULg

in Bulletin de la Société Géographique de Liège (2010), 54

Many studies already investigated the impact of climate change and climate variability on vegetation at global and continental scales. Low resolution satellite imagery is one of the main sources of ... [more ▼]

Many studies already investigated the impact of climate change and climate variability on vegetation at global and continental scales. Low resolution satellite imagery is one of the main sources of information. In this paper, we describe a strategy to improve the quality of 10-daily time series of Normalized Difference Vegetation Index derived from SPOT-VEGETATION. A specifi c methodology was also defi ned in order to identify optimal test sites for the analysis of climate control on intra-annual dynamic of croplands. Finally two cases studies are presented to illustrate this research and in particular the non linear relationship between NDVI and meteorological parameters during the growing season. [less ▲]

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See detailDe l'origine sismique de structures sédimentaires pléistocènes à Terreti, Calabre
Cornet, Yves ULg; Demoulin, Alain ULg

in Bulletin de la Société Géographique de Liège (2010), 54

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See detailLa pathologie hypothalamo-hypophysaire post-traumatique
VALDES SOCIN, Hernan Gonzalo ULg; Beckers, Albert ULg

Conference (2010, April 24)

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See detailIndéterminations de la photographie (I)
Havelange, Carl ULg

Conference (2010, April 23)

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See detailA regional flux-based risk assessment approach of contaminated sites on groundwater bodies
Brouyère, Serge ULg; Jamin, Pierre ULg; Dollé, Fabien ULg et al

Poster (2010, April 22)

In the context of the water framework directive, management plans have to be set up about water quality in surface and groundwater bodies in the EU. One of the first steps is to evaluate the risk of ... [more ▼]

In the context of the water framework directive, management plans have to be set up about water quality in surface and groundwater bodies in the EU. One of the first steps is to evaluate the risk of contamination of these water resources, and particularly the risk posed by contaminated industrial sites. From the perspective of water resource management, each of these sites taken individually does not necessary constitute a major threat. However, in heavily industrialised and urbanised areas, the cumulative effect of multiple contaminant sources is likely to present a risk. In order to propose adequate but still economically reliable measures, the calculated risk should be based on a so-called megasite approaches using criteria reflecting the water quality deterioration, in a cumulative way, at the scale of the whole surface water or groundwater body. A GIS-based regional risk assessment approach is developed here for groundwater bodies using the SEQ-ESO currently used within the Walloon Region as indicator to reflect the quality status of the groundwater body. The approach is applied on the groundwater body RWM073 “Gravels and alluvial deposits of the Meuse river between Engis and Herstal”, identified at risk of not reaching a good quality status by 2015. The different steps of this methodology consist of an inventory of proved or potential contaminating industrial sites, a numerical modelling of pollutants behaviour at the scale of the groundwater body and the application of the SEQ-ESO that finally gives a global quality status of the whole groundwater body. This analysis also serves as basis for a socio-economic approach intending to provide indications on costs and benefits generated by total or partial remediation of the contaminated groundwater bodies according to the different management scenarios. [less ▲]

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See detailPhysically-based groundwater vulnerability assessment for groundwater protection and land-use management
Popescu, Ileana-Cristina; Brouyère, Serge ULg; Derouane, Johan et al

Poster (2010, April 22)

Numerous groundwater vulnerability and risk mapping techniques have been developed taking into consideration a variable number of factors. Most common techniques produce maps of indexes based on a ... [more ▼]

Numerous groundwater vulnerability and risk mapping techniques have been developed taking into consideration a variable number of factors. Most common techniques produce maps of indexes based on a relatively empirical combination of weighted factors reflecting the protective effect of underground formations overlying the groundwater resource. The limitation of such methods is related to their use of a qualitative definition of groundwater vulnerability, as opposed to a definition based on a quantitative description of contaminant migration. A physically-based point of view and definition of the vulnerability is proposed and based on three factors describing a pollution event, which are the contaminant transfer time from the hazard location to the 'target', the contamination duration at the 'target' and the level of contaminant concentration reached at the 'target'. This concept allows a clear distinction between conventional aspects and physically-based results in the building of a final vulnerability indicator. This methodology has the further advantage to consider the possible impact of runoff conditions occurring at the land surface and possibly leading to lateral contamination of groundwater through downstream preferential infiltration features, such as karstic features. Practically, this method needs to describe and simulate the pollutant migration in the unsaturated zone and possibly in the saturated zone in order to assess the breakthrough curve at the 'target'. Preliminary application is illustrated on a case-study located in a Néblon limestone basin in Belgium, one of the main groundwater resources for the city of Liège in the Meuse basin. Perspectives are proposed towards a generalisation of the vulnerability concept for risk assessment within a pressure - state - impact framework. [less ▲]

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See detailFlood Protection Design Based on Micro-scale Risk Modelling
Ernst, Julien ULg; Dewals, Benjamin ULg; Detrembleur, Sylvain ULg et al

Poster (2010, April 22)

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See detailSolutions TP2 Ajustements
Trif, David Ioan ULg

Learning material (2010)

Ce document offre les solutions pour les exercices sur les ajustements. On trouve aussi des figure qui simplifient la compréhension des termes spécifiques pour ce chapitre.

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See detailTP2 - Ajustements
Trif, David Ioan ULg

Learning material (2010)

Dans ce chapitre, on présente quelques exercices sur les ajustements. Avec ces exemples, les étudiants vont apprendre la nomenclature spécifique, comment trouver les écarts, le jeu et l'interférence dans ... [more ▼]

Dans ce chapitre, on présente quelques exercices sur les ajustements. Avec ces exemples, les étudiants vont apprendre la nomenclature spécifique, comment trouver les écarts, le jeu et l'interférence dans un ajustement. [less ▲]

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See detailInstabilité de Faraday à l'interface entre mousse et solution
Bronfort, Ariane ULg

Conference (2010, April 20)

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See detailAtteintes neurologiques périphériques du pied
Kaux, Jean-François ULg; Wang, François-Charles ULg

Conference (2010, April 20)

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See detailSolutions TP8 Mécanisme - Arbres - Engrenages
Trif, David Ioan ULg

Learning material (2010)

Dans ce chapitre on trouve les solutions des exercices proposés pour le travail pratique numéro 8 (Mécanisme - Arbres - Engrenages).

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See detailAn introduction to optical/IR interferometry (PDF file)
Surdej, Jean ULg

Learning material (2010)

Lecture notes of an introductory course on optical/IR interferometry (2010 VLTI School organized on 17-28 April 2010 at Centre IGESA, Porquerolles Island, Côte d'Azur, France). For more information, see ... [more ▼]

Lecture notes of an introductory course on optical/IR interferometry (2010 VLTI School organized on 17-28 April 2010 at Centre IGESA, Porquerolles Island, Côte d'Azur, France). For more information, see http://www.european-interferometry.eu/training/2010 [less ▲]

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See detailHerbicides, régulateurs, fongicides, azote: que penser du regroupement des traitements ... en culture de froment?
Seutin, Benoit ULg; Vancutsem, Françoise ULg; Bodson, Bernard ULg

in de Neuville (Ed.) Le Sillon Belge (2010)

Réaliser, en un passage, des interventions utiles à la culture à un même stade de développement, répond à une simple question de bons sens pratique et économique. Mais cette stratégie n'est pas dénuée de ... [more ▼]

Réaliser, en un passage, des interventions utiles à la culture à un même stade de développement, répond à une simple question de bons sens pratique et économique. Mais cette stratégie n'est pas dénuée de risques de perte de rendement à la récolte. Coup d'oeil sur les résultats d'essais réalisés à Gembloux. [less ▲]

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