Regional-scale brine migration along vertical pathways due to CO2
injection – Part 1: the participatory modeling approach
Dirk Scheer1, Wilfried Konrad1, Holger Class2, Alexander Kissinger2, Stefan Knopf3, and Vera Noack31DIALOGIK, Lerchenstraße 22, 70176 Stuttgart, Germany 2Department of Hydromechanics and Modelling of Hydrosystems, University Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany 3Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, 30655 Hannover, Germany
Received: 23 Dec 2016 – Accepted for review: 06 Jan 2017 – Discussion started: 16 Jan 2017
Abstract. Saltwater intrusion into potential drinking water aquifers due to the injection of CO2 into deep saline aquifers is one of the hazards associated with the geological storage of CO2. Thus, in a site-specific risk assessment, models for predicting the fate of the displaced brine are required. From the very beginning, this research on brine migration, has been aimed at involving expert and stakeholder knowledge in simulating the impacts of injecting CO2 into deep saline aquifers by means of a participatory modeling process. The involvement exercise made use of two approaches. First, guideline-based interviews were carried out aimed at eliciting expert and stakeholder knowledge and assessments on geological structures and mechanisms affecting CO2 induced brine migration. Second, a stakeholder workshop, including the world café format, was used to evoke evaluations and judgments on the modeling approach, on scenario selection, and on preliminary simulation results. The participatory modeling approach gained several results covering brine migration in general, the geological model sketch, scenario development, and the review of the preliminary simulation results.
Scheer, D., Konrad, W., Class, H., Kissinger, A., Knopf, S., and Noack, V.: Regional-scale brine migration along vertical pathways due to CO2
injection – Part 1: the participatory modeling approach, Hydrol. Earth Syst. Sci. Discuss., doi:10.5194/hess-2016-686, in review, 2017.