Université de Neuchâtel

Sondages géoélectriques "null-arrays" pour la caractérisation des structures de subsurface

Falco, Pierik ; Perrochet, Pierre (Dir.) ; Milnes, Ellen (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

The term "geoelectric null-array" is used for those geoelectrical configurations measuring a zero potential difference above a homogenous half-space. This thesis presents a study of the behaviour of three of these null-arrays - the midpoint null-array, the Wenner-γ null-array and the Schlumberger null-array - above different vertical structures, using profiling and azimuthal measurements. A...

Université de Neuchâtel

Analyse des processus advectifs-dispersifs en milieux poreux sous contraintes hydrologiques périodiques : implications pour la protection des captages d’eaux souterraines

Badoux, Vincent ; Perrochet, Pierre (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th.1976.

Water protection is written in the Swiss Federal Consitution. On that basis, the Federal Assembly enacted laws that aim to protect water from any kind of contamination. It establishes groundwater protection schemes around water supply wells, such as the protection zones S1, S2 and S3 and the area of contribution Zu. The aims of the present thesis, on the one hand, was to study the influence of...

Université de Neuchâtel

Une approche déterministe des distributions des temps de transit de l'eau souterraine par la théorie des réservoirs

Etcheverry, David ; Perrochet, Pierre (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2001 ; 1585.

The applicability of the reservoir theory is explored through a deterministic approach of groundwater transit time distributions in purely advective conditions. The theory is reformulated in a probabilistic framework and supported by the Gauss divergence theorem. This emphasizes the relationship between ages at the outlet and the flux vector field within the system. The concept of residual...