Ginette_2022

Ginette is a 2-D variably saturated groundwater flow model with integrated 1-D surface flow for the stream. It uses physically-based equations to rigorously simulate fluxes of water, energy and solute transport in porous media. The coupling of fluid flow and heat transfer, accounting for freezing and thawing processes, is implemented in the code for a fully saturated medium. Ginette was initially developed at METIS (Sorbonne University) to deal with interactions between streams and aquifers, as they fluctuate from a connected to a disconnected status. Numerical simulations of experimental laboratory results reproducing such conditions provided the opportunity to test the coupled 1D surface water - 2D variably saturated groundwater code (Rivière et al., 2014). Ginette was then extended to include coupled heat transfer and water flow in saturated porous media and is now jointly developed by Metis and MINES ParisTech (PSL University). The code was compared to experimental data acquired on a complex laboratory system to provide validation on the physical processes and mathematical formulations, in particular for the representation of density change between frozen and liquid water (Rivière et al., 2019). Real-world cryo-hydrogeological paleo-applications, which have been presented in conferences (e.g. Jost, 2011; Jost et al., 2014), were also proposed using Ginette, requiring some additional adaptation to the specific needs of basin-scale calculations.

Ginette strives to provide the user with full control over the the simulation. The command files can be written either with a Python script or with an R script.

Different applications are available in the application directory.

The test cases of the interfrost group benchmark. The Interfrost group proposes a benchmark exercise dealing with the “Subsurface thermal hydrologic processes” as presented by (Painter et al., 2012) or within the field of Cryohydrogeology (McKenzie et al. 2020) https://tc.copernicus.org/preprints/tc-2020-132/. In a first phase of the project we firstly limit our efforts to the more simple set of equations involving Darcy flow (fully saturated porous medium) coupled with heat transfer with advection and phase change. Extensions of the benchmark to Richard equations or including the air phase are considered for later phases of the project. The benchmark consists of some test cases inspired by existing literature (e.g. Mc Kenzie et al., 2007) as well as new ones. Some experimental cases in cold room will complement the validation approach. In view of a second phase, the benchmark project is open as well to new or alternative cases reflecting a numerical or a process oriented interest or answering a more general concern among the cold region community.

Different test cases in unsaturated zone are available

The chain of estimation of the hydraulic and thermal hyporheic zone properties from LOMOS-mini sensor data ( Cucchi et al. 2018 (⟨10.1016/j.jhydrol.2017.10.074⟩. ⟨hal-01656455⟩).

2021-09

Ginette is a 2-D variably saturated groundwater flow model with integrated 1-D surface flow for the stream. It uses physically-based equations to rigorously simulate fluxes of water and energy in porous media. Tthe coupling of fluid flow and
heat transfer, accounting for freezing and thawing processes, is implemented in the code for a fully saturated medium.

Ginette-2020-09

Ginette is a 2-D variably saturated groundwater flow model with integrated 1-D surface flow for the stream. It uses physically-based equations to rigorously simulate fluxes of water and energy in porous media. Tthe coupling of fluid flow and
heat transfer, accounting for freezing and thawing processes, is implemented in the code for a fully saturated medium.