OpenGeoSys: an open-source initiative for numerical simulation of thermo-hydro-mechanical/chemical (THM/C) processes in porous media

Kolditz, Olaf; Bauer, Sebastian; Bilke, Lars; Böttcher, Norbert; Delfs, Jens-Olaf; Fischer, Thomas; Görke, Uwe–Jens; Kalbacher, Thomas; Kosakowski, Georg; McDermott, Christopher; Park, C. H.; Radu, Florin A.; Rink, Karsten; Shao, Haibing; Shao, Haibing; Sun, Feng; Sun, Yuanyuan; Singh, Ashok Kumar; Taron, Joshua; Walther, Marc; Wang, Wenqing; Watanabe, Norihiro; Wu, Yong Bo; Xie, Mingliang; Xu, Wen; Zehner, Björn

doi:10.1007/s12665-012-1546-x

Cited by 531 publications

(234 citation statements)

References 32 publications

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“…The same is true for regionalisation, i.e. the generalisation of data or model parameters obtained from distinct points or small spatial entities to larger areas (Diekkrüger et al 1999;Kleeberg et al 1999;Parajka et al 2005;Samaniego et al 2010). Few authors, however, deal explicitly with the scale dependency of GW-SW (CSIRO 2008;Dahl et al 2007;Kollet and Maxwell 2008;Levy and Xu 2012).…”

Section: Gw-sw Related Processes At Different Scalesmentioning

confidence: 99%

Groundwater and Surface Water Interaction at the Regional-scale – A Review with Focus on Regional Integrated Models

Barthel

Banzhaf

2015

Water Resour Manage

186

119

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Scientists and practitioners agree that integrated water resource management is necessary, with an increasing need for research at the regional scale (10 3 to 10 5 km 2 ). At this scale interactions between environmental and human systems are fully developed and global change is linked to local actions. The groundwater-surface water interaction (GW-SW) is of particular interest. Herein we review the scientific journal literature and examine GW-SW at the regional scale. We briefly review all existing literature on GW-SW, then summarise its characteristics at different scales and identify specific challenges of the regional scale. We explore whether GW-SW should be treated differently at regional and local scales. Regional GW-SW is rarely examined in experimental field studies, which almost exclusively cover small areas. However, GW-SW is often integral to large scale coupled models. Thus, we collate information about existing models and their regional applications. Fully coupled, physics-based models have great potential to meet the technical challenges. However, limited data availability hampers the application of complex models at the regional scale and loosely coupled schemes are more widely applied. Many integrated modelling concepts have been published, but none have been applied in a wide range of settings. Thus, it is impossible to compare the performance of different approaches. Comparative analyses of existing regional scale integrated models in the context of different data availability and geographic conditions are needed. Unfortunately, peer-reviewed journal literature no longer provides a representative picture of the subject as models are becoming Btoo big to be published^or too pragmatic.

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Section: Gw-sw Related Processes At Different Scalesmentioning

confidence: 99%

Groundwater and Surface Water Interaction at the Regional-scale – A Review with Focus on Regional Integrated Models

Barthel

Banzhaf

2015

Water Resour Manage

186

119

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“…Differences in model results were moderate once data interpretation issues had been resolved, and were mostly related to differences in spatial and temporal discretization (Class et al, 2009 The recent DECOVALEX project on model comparison, conducted by several international organizations involved in the geologic disposal of nuclear wastes (e.g., Rutqvist et al, 2008;Tsang, 2009;Tsang et al, 2009) Note that Sim-SEQ, which is bringing together a large number of modeling teams (from eight different countries) in an effort to understand the root causes of model uncertainty (in the context of CO 2 geologic sequestration) and the impacts of such uncertainty on our ability to predict the subsurface movement of the injected CO 2 , is likely to benefit from the lessons learned during the CLEAN project (Kühn et al, 2012), which is also a collaborative effort of sixteen different partners (though all from one country, Germany) to investigate the fate of CO 2 when injected in a depleted gas field for the purposes of enhanced gas recovery. Of particular relevance to Sim-SEQ is the OpenGeoSys (OGS), initiative of the CLEAN project (Kolditz et al, 2012a). OGS is a scientific, open source scode for numerical simulation of thermo-hydro-mechanical-chemical (THMC) processes in porous media.…”

Section: Code Benchmarking Vs Model Comparisonmentioning

confidence: 99%

A model comparison initiative for a CO2 injection field test: an introduction to Sim-SEQ

et al. 2012

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Because of the complex nature of subsurface flow and transport processes at geologic carbon storage (GCS) sites, modelers often need to implement a number of simplifying choices while building their conceptual models. Such simplifications may lead to a wide range in the predictions made by different modeling teams, even when they are modeling the same injection scenario at the same GCS site. Sim-SEQ is a new model comparison initiative with the objective to understand and quantify uncertainties arising from conceptual model choices. While code verification and benchmarking efforts have been undertaken in the past with regards to GCS, Sim-SEQ is different, in that it engages in model comparison in a broader and comprehensive sense, allowing modelers the choice of interpretation of site characterization data, boundary conditions, rock and fluid properties, etc., in addition to their choice of simulator. In Sim-SEQ, fifteen different modeling teams, nine of which are from outside the United States, are engaged in building their own models for one specific CO 2 injection field test site located in the southwestern part of Mississippi. The complex geology of the site, its location in the water leg of a CO 2 -EOR field with a strong water drive, and the presence of methane in the reservoir brine make this a challenging task, requiring the modelers to make a large number of choices about how to model various processes and properties of the system. Each model team starts with the same characterization data provided to them but uses its own conceptual models and simulators to come up with model predictions, which can be iteratively refined with the observation data provided to them at later stages. Model predictions will be compared with one another and with the observation data, allowing us to understand and quantify the model uncertainties.

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“…Further information concerning OGS can be found in e.g. Kolditz (2002), Wang et al (2009), Kolditz et al (2012b), Wang et al (2013), and Kolditz et al (2012a). The model set-up is performed for a 2D-model with plane strain conditions, representing a vertical slice of the niche.…”

Section: Model Set-upmentioning

confidence: 99%

Coupled hydraulic-mechanical simulation of seasonally induced processes in the Mont Terri rock laboratory (Switzerland)

Ziefle¹,

Matray²,

Maßmann³

et al. 2017

Swiss J Geosci

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This paper focuses on hydraulic-mechanical effects in the Mont Terri rock laboratory (Switzerland) and investigates their impact on pore pressure, the convergence of a niche and the evolution of pre-existing cracks in the wallrock of the niche. A comparison of measurements with numerical simulation results is conducted. The presented in situ measurements include long-term data on temperature, relative humidity, and niche convergence, as well as crackmeter and jointmeter measurements determining the aperture of a bedding-parallel crack. Furthermore, timedomain-reflectometry measurements were carried out in a borehole located in the niche wall close to the crack. They provide information on the water content of the claystone. The numerical simulation is carried out with OpenGeoSys. It contains a 2-dimensional coupled hydraulic-mechanical model considering orthotropy, swelling and shrinkage effects, linear elastic material behaviour and an excavation damaged zone characterized by a zone of lower rock strength. An additional focus is laid on the evolution of cracks in the wallrock of the niche. The presented model approach allows a prediction of the temporal evolution of a desaturated zone incorporating a seasonally influenced part. The comparison with measured water contents yields good agreement. Simulation results and measurements consistently predict a convergence of the niche. The evolution of the crack aperture is influenced by long-term as well as seasonallyinfluenced effects. Due to the convergence of the niche, the long-term trend is characterized by closure of the crack. Furthermore, the seasonally influenced desaturation in winter results in opening of the crack, while the resaturation in the warm and wet summer months leads to closure of the crack. Finally, the comparison of simulation results with measurements indicates qualitative agreement. As a matter of fact, the numerical model seems to represent significant effects concerning the evolution of the crack aperture of a single crack.

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OpenGeoSys: an open-source initiative for numerical simulation of thermo-hydro-mechanical/chemical (THM/C) processes in porous media

Cited by 531 publications

References 32 publications

Groundwater and Surface Water Interaction at the Regional-scale – A Review with Focus on Regional Integrated Models

Groundwater and Surface Water Interaction at the Regional-scale – A Review with Focus on Regional Integrated Models

A model comparison initiative for a CO2 injection field test: an introduction to Sim-SEQ

Coupled hydraulic-mechanical simulation of seasonally induced processes in the Mont Terri rock laboratory (Switzerland)

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