Université de Neuchâtel

Coupling X-ray computed tomography and freeze-coring for the analysis of fine-grained low-cohesive soils

Liernur, Adrien ; Schomburg, Andreas ; Turberg, Pascal ; Guenat, Claire ; Le Bayon, Renée-Claire ; Brunner, Philip

In: Geoderma, 2017, vol. 308, p. 171-186

This paper presents the coupling of freeze-core sampling with X-ray CT scanning for the analysis of the soil structure of fine-grained, low-cohesive soils. We used a medical scanner to image the 3D soil structure of the frozen soil cores, providing X-ray CT data at a millimetric resolution over freeze-cores that are up to 62.5 cm long and 25 cm wide. The obtained data and the changes in gray...

Université de Neuchâtel

Effects of endogeic earthworms on the soil organic matter dynamics and the soil structure in urban and alluvial soil materials

Amossé, Joël ; Turberg, Pascal ; Kohler-Milleret, Roxane ; Gobat, Jean-Michel ; Le Bayon, Renée-Claire

In: Geoderma, 2015, vol. 243-244, p. 50-57

Earthworms are considered as key actors of soil processes at different spatial and temporal scales and provide essential ecosystem services linked to climate regulation or primary production. However, little is known about their basic functional roles (e.g. organic matter decomposition, soil structuring processes) in perturbed systems such as urban or alluvial soils. Alluvial soils are...

Université de Neuchâtel

The combined use of radio-frequency electromagnetics and radiomagnetotellurics methods in non-ideal field conditions for delineating hydrogeological boundaries and for environmental problems

Dill Carvalho, Amélia ; Turberg, Pascal ; Müller, Imre ; Parriaux, Aurèle

In: Environmental Geology, 2009, vol. 56, no. 6, p. 1071-1091

Radio frequency geophysical methods are known for being very versatile tools in ground- and groundwater investigation at shallow depths. They are fast and easy to use and allow a high density of information over large surfaces, which makes them very suitable for geological mapping sensu lato (faults, lithological contacts, groundwater-bearing structures, vulnerability maps, and contaminant...