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4-6 Karst Network Analysis and Modelling

Karst Network Analysis and Modelling - Analyse des réseaux karstiques et modélisation
Abstracts can be downloaded below - les résumés peuvent être téléchargés ci-dessous

Co-organisation: Sophie Viseur , Philippe Renard, Pauline Collon-Drouaillet.

Karst conduit networks have been widely studied concerning the speleogenesis processes. Nowadays, many systems have been mapped in detail by speleological surveys. Supported by this geological knowledge on the karst settings and because of the recent advances in data acquisition (LIDAR, UnderGround Positioning System, numerical georeferenced maps, etc.) as well as in numerical data analysis and geomodelling (geostatistical and process-based approaches), the simulation of karst networks recently appears as a new research field with a wide range of potential applications. Karst networks have indeed a major impact for example on groundwater, contaminant migration or petroleum recovery. Carbonate groundwater or hydrocarbon reservoir characterization requires in particular to:
  • Identify relevant scales for analysis and modelling. Obviously, it is not possible to include all the details of karstic systems at all scales in a given model. It is therefore extremely important to model features at the relevant scale and develop upscaling techniques to represent in an adequate manner the missing scales.

  • Deterministically and stochastically model the geometry and the topology of the karst networks, especially since numerous karst networks are still unobserved or humanly inaccessible. This can be achieved through geostatistical or process-based techniques. It also involves defining robust parameters to characterize either the geometry and the topology of the observed karst conduits or the speleogenesis processes.

  • Represent flow and transport processes in karst conduit elements coupled with their matrix background. Questions related to the type of phenomenological laws that should be employed and to the numerical techniques involved in solving those equations are of particular interest.

This session aims at providing a forum for researchers involved in the development of methods in this field. It will allow assessing the current state of the art in analysing and modelling karstic networks and their associated flow behaviours.

Jacques Mudry,
17 Aug 2011, 09:51