References of "Rixhon, Gilles"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailValley downcutting in the Ardennes (W Europe): Interplay between tectonically triggered regressive erosion and climatic cyclicity
Demoulin, Alain ULg; Beckers, Arnaud ULg; Rixhon, Gilles ULg et al

in Netherlands Journal of Geosciences - Geologie en Mijnbouw (2012), 91(1-2), 79-90

Detailed reference viewed: 24 (8 ULg)
Full Text
See detailLe mouvement pendulaire en Belgique : les déplacements domicile-travail, les déplacements domicile-école. Enquête Socio-économique 2001. Monographies (n°10)
Verhetsel, A.; Van Hecke, E.; Thomas, I. et al

Book published by SPF Economie, PME, Classes moyennes et Energie - Traduit en néerlandais (2009)

Detailed reference viewed: 146 (13 ULg)
Full Text
See detailLes déplacements domicile-école
Halleux, Jean-Marie ULg; Lambotte, Jean-Marc ULg; Rixhon, Gilles ULg et al

in Verhetsel, A.; Van Hecke, E.; Thomas, I. (Eds.) et al Le mouvement pendulaire en Belgique : les déplacements domicile-lieu de travail, les déplacements domicile-école. Enquête Socio-économique 2001. Monographies (n°10) (2009)

Detailed reference viewed: 132 (11 ULg)
Full Text
Peer Reviewed
See detailAmount and controls of the Quaternary denudation in the Ardennes massif (western Europe)
Demoulin, Alain ULg; Hallot, Eric ULg; Rixhon, Gilles ULg

in Earth Surface Processes & Landforms (2009), 34

It is still debated whether the primary control on the middle Pleistocene denudation of the uplifted Ardennes massif (western Europe) is tectonic or climatic. Here, based on geomorphological observations ... [more ▼]

It is still debated whether the primary control on the middle Pleistocene denudation of the uplifted Ardennes massif (western Europe) is tectonic or climatic. Here, based on geomorphological observations, we calculate the amount of river incision and interfluve denudation in the Meuse basin upstream of Maastricht since 0·7 Ma and we show that the main response to tectonic forcing was incision. This allows us to provide first-order estimates of the tectonic and climatic contributions to the denudation of the Ardennes. From a dataset of 71 remnants of a terrace level dated ~0·7 Ma, we first derive a basin-scale functional relationship linking incision with distances to the regional base level (Lc) and to the source (Ls) in the Ourthe basin (pertaining to the Ardennian part of the Meuse basin). Expressed as I = I0*(1 – a*Lcb/Lsc), I0 being the incision measured at the basin outlet, this relationship calculates that river incision has removed 84 km3 of rock in the Meuse basin upstream of Maastricht since 0·7 Ma. In the same time, 292 km3 were eroded from the interfluves. A comparison of these volumes shows that the tectonically forced river incision accounts for ~22% of the total post-0·7 Ma denudation. Furthermore, the mean denudation rate corresponding to our geomorphological estimate of the overall denudation in the Meuse basin since 0·7 Ma amounts to 27 mm/ky, a figure significantly lower than the ~40 mm/ky mean rate derived from 10Be studies of terrace deposits of the Meuse (Schaller et al., 2004). This suggests that, taken as a basin average, the 10Be-derived rate is overestimated, probably due to an overrepresentation of the erosion products of the rapidly incising valleys in the alluvial deposits. [less ▲]

Detailed reference viewed: 38 (5 ULg)
Full Text
Peer Reviewed
See detailAn automated method to extract fluvial terraces from digital elevation models: The Vesdre valley, a case study in eastern Belgium
Demoulin, Alain ULg; Bovy, Benoît ULg; Rixhon, Gilles ULg et al

in Geomorphology (2007), 91(1-2), 51-64

Fluvial terraces are a powerful tool for unraveling the combined tectonic and climatic conditions that controlled, directly or indirectly, the Quaternary incision of rivers. Terrace long profiles are ... [more ▼]

Fluvial terraces are a powerful tool for unraveling the combined tectonic and climatic conditions that controlled, directly or indirectly, the Quaternary incision of rivers. Terrace long profiles are usually retrieved from sparse traces of ancient floodplains preserved in the present topography. However, when these traces classically collected from topographic maps, aerial photographs, and field analyses are too few, the inferred profiles may be questionable. Yet the now available high quality and high resolution digital elevation models (DEMs) offer an opportunity to increase greatly the quantity of information usable to reconstruct terrace profiles. Therefore, the purpose of this study was to develop a new DEM-based method of terrace recognition in order to create a larger database and better constrain the profile reconstruction. Moreover, particular procedures of image and numerical processing were defined to fully automate the analysis. Basically, our method relies on the production of bivariate scatter plots depicting the relation between slope and relative altitude (i.e., the altitude above the current alluvial plain) for all pixels of successive sections of the valley. For each scatter plot, the curve of the lowest slope values observed at every relative altitude is smoothed and its minima are assumed to locate the altitudes of the "terrace" elements preserved in the section. We successfully tested this method in the Vesdre valley, incised in the NE Ardenne massif (E Belgium), notably identifying fault deformation of the profiles. The main advantages of our approach are its objectivity, exhaustiveness, and rapidity, allowing fast and coherent analysis of many rivers over extended regions. (c) 2007 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 121 (33 ULg)
Full Text
See detailLes navettes scolaires en Belgique : situation en 2001 et évolution 1991-2001
Halleux, Jean-Marie ULg; Rixhon, Gilles ULg; Lambotte, Jean-Marc ULg et al

in Statistics Belgium Working Paper (2007), (16),

Detailed reference viewed: 45 (7 ULg)