Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/hess-2016-686
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
16 Jan 2017
Review status
A revision of this discussion paper is under review for the journal Hydrology and Earth System Sciences (HESS).
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 Noack3 1DIALOGIK, 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
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.

Citation: 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.
Dirk Scheer et al.
Dirk Scheer et al.
Dirk Scheer et al.

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Short summary
Stakeholder participation in numerical modeling of brine migration due to injection of CO2 into deep saline aquifers is tested in this work. Part 1 reports the process of participatory modeling on the development of a numerical model and Part 2 discusses essential technical findings obtained through this model showing that notable increases in salt concentrations are confined to regions where they were already high a priori and where barrier layers are discontinuous.
Stakeholder participation in numerical modeling of brine migration due to injection of CO2 into...
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