Université de Neuchâtel

Recharge quantification and continental freshwater lens dynamics in arid regions : application to the Merti aquifer (eastern Kenya)

Blandenier, Lucien ; Perrochet, Pierre (Dir.) ; Milnes, Ellen (Codir.) ; Brunner, Philip (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2015.

The Dadaab refugee camp, the largest refugee camp in the world with a population of approximately 400’000 persons, is located in the arid to semi-arid eastern Kenya, close to the Somali border. The only permanent water resource for the refugees and the host communities comes from the Merti aquifer which consists in a large continental freshwater lens of 250 km by 50 km surrounded by salty...

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

Deterministic and probabilistic numerical modelling towards sustainable groundwater management : application to seawater intrusion in the Korba aquifer (Tunisia)

Kerrou, Jaouher ; Renard, Philippe (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th. 2053.

This PhD endeavours numerical groundwater modelling considering heterogeneous and uncertain hydraulic parameters. It is made of three parts. First, we investigated the effects of dimensionality and heterogeneity of the hydraulic conductivity on dispersive seawater intrusion (SWI) processes. Multiple 2D and 3D unconditional simulations of hydraulic conductivity fields sharing the same statistics...