Université de Neuchâtel

Can one identify karst conduit networks geometry and properties from hydraulic and tracer test data?

Borghi, Andrea ; Renard, Philippe ; Cornaton, Fabien

In: Advances in Water Resources, 2016, vol. 90, p. 99-115

Karst aquifers are characterized by extreme heterogeneity due to the presence of karst conduits embedded in a fractured matrix having a much lower hydraulic conductivity. The resulting contrast in the physical properties of the system implies that the system reacts very rapidly to some changes in the boundary conditions and that numerical models are extremely sensitive to small modifications in...

Université de Neuchâtel

Stochastic forecasts of seawater intrusion towards sustainable groundwater management : application to the Korba aquifer (Tunisia)

Kerrou, Jaouher ; Renard, Philippe ; Cornaton, Fabien ; Perrochet, Pierre

In: Hydrogeology Journal, 2013, vol. 21, no. 2, p. 425-440

A stochastic study of long-term forecasts of seawater intrusion with an application to the Korba aquifer (Tunisia) is presented. Firstly, a geostatistical model of the exploitation rates was constructed, based on a multi-linear regression model combining incomplete direct data and exhaustive secondary information. Then, a new method was designed and used to construct a geostatistical model of the...

Université de Neuchâtel

A method for the stochastic modeling of karstic systems accounting for geophysical data : an example of application in the region of Tulum, Yucatan Peninsula (Mexico)

Vuilleumier, Cécile ; Borghi, Andrea ; Renard, Philippe ; Ottowitz, David ; Schiller, A. ; Supper, Robert ; Cornaton, Fabien

In: Hydrogeology Journal, 2013, vol. 21, no. 9, p. 523-544

The eastern coast of the Yucatan Peninsula, Mexico, contains one of the most developed karst systems in the world. This natural wonder is undergoing increasing pollution threat due to rapid economic development in the region of Tulum, together with a lack of wastewater treatment facilities. A preliminary numerical model has been developed to assess the vulnerability of the resource. Maps of...

Université de Neuchâtel

Truncated Plurigaussian Simulations to Characterize Aquifer Heterogeneity

Mariethoz, Grégoire ; Renard, Philippe ; Cornaton, Fabien ; Jacquet, Olivier

In: Ground Water, 2009, vol. 47, no. 1, p. 13-24

Integrating geological concepts, such as relative positions and proportions of the different lithofacies, is of highest importance in order to render realistic geological patterns. The truncated plurigaussian simulation method provides a way of using both local and conceptual geological information to infer the distributions of the facies and then those of hydraulic parameters. The method (Le...