Carte hydrogéologique de Wallonie 1/25000, 67/7-8, Florenville-Izel

Cartographic material (2007)

Carte hydrogéologique de Wallonie 1/25000. 685/1-2, Assenois - Anlier.

Cartographic material (2007)

Carte hydrogéologique de Wallonie 1/25000. 65/7-8, Limerlé-Langler, notice explicative.

Book published by Service public de Wallonie, DGARNE - peer reviewed (2007)

Carte hydrogéologique de Wallonie. 1/25000 71/3-4 Saint-Léger-Messancy, 71/7-8 Musson-Le Fays, 72/1 Houwald, notice explicative.

Book published by SPW, DGARNE - peer reviewed (2007)

Carte hydrogéologique de Wallonie, 1/25000, 68/5-6 Etalle-Tintigny, notice explicative.

Book published by SPW, DGARNE - peer reviewed (2006)

Hydrogeological mapping of the Walloon region (Belgium).

in Proceedings of the 5th european congress on regional geoscientific cartography and information systems. (2006)

Carte hydrogéologique de Wallonie 1/25000. 65/3-4, Bastogne - Wardin et 65/7-8 Fauvillers - Romeldange.

Cartographic material (2006)

Carte hydrogéologique de Wallonie 1/25000. 65/3-4, Bastogne - Wardin et 65/7-8 Fauvillers - Romeldange.

Cartographic material (2006)

Geochemical composition of sediments in the Scheldt

in Hydrobiologia (2005), 540(1-3), 155-168

Superficial sediments of the Scheldt estuary were collected with a Van Veen grab at 57 stations between Temse and Vlissingen. They were analysed for major elements (Si, Al, Fe, Ca, Mg, Na, K, Cinorg and ... [more ▼]

Superficial sediments of the Scheldt estuary were collected with a Van Veen grab at 57 stations between Temse and Vlissingen. They were analysed for major elements (Si, Al, Fe, Ca, Mg, Na, K, Cinorg and Corg) and trace metals (Cd, Pb, Cu, Zn, Cr, Ni, Co, Mn and Li). Factor analysis indicates that 44% of the variance can be explained by one factor which exhibits a high saturation for trace metals, organic matter, Al and Fe, all variables typical of fine mud. The high scores of this first factor are almost exclusively present in the upper estuary except for one area in front of Terneuzen. The second factor, which explains 23% of the variance, is typical of the carbonates and the third one (19% of the variance) is representative of the clay minerals. These two factors are more evenly distributed over the estuary. As usual, a strong influence of granulometry on the distribution of trace elements in the sediments was observed. Intercomparison of their composition within the Scheldt or with those of other aquatic systems requires thus a normalization procedure. This problem has been studied in detail by analysing various size fractions (63–16, 16–8, 8–4, <4 m) obtained by elutriation of the sample or by using a parameter characteristic of the fine fraction such as the concentration of a typical element (Al, Fe, Li, Corg). The normalization of trace metals allowed us to evaluate an enrichment factor of the trace elements in the estuarine deposits due to mans activities. In addition, it demonstrates the decrease of the anthropogenic impact on the composition of sediments by comparing the composition of sediments collected in 1976 and in 1994. [less ▲]

Coupling GIS with database for hydrogeological mapping.

Conference (2003, May)