The understanding of the behavior of the Critical Zone (CZ) in response to the global changes requires the integration of geological, geochemical and biological cycles and their couplings at different and relevant time-space scales. The O_ZNS platform (Observatory of the Vadoze Zone (VZ) of the Beauce carbonate aquifer) is a part of the PIVOTS regional program (Innovation Platforms for the valorisation and optimization of environmental technologies: https://plateformes-pivots.eu
The field acquisitions of long-term environmental data target are crucial to identify the fingerprints of complex and coupled physical, physicochemical and microbiological processes as well as their role in fixation, degradation and / or transfer of pollutants in the VZ. This obviously requires multidisciplinary skills, complementary methods and result joint interpretations as well as renewed theoretical approaches. The development of O_ZNS platform aims to build a large and sustainable partnerships (academic, industrial, state agencies, etc.), at national and international scales, in a collaborative way that guarantees the continuity between the academic research, industrial needs and the academic training of young engineers and researchers.u/ ) with a main objective directed to the understanding of mass and heat transfer mechanisms and the fate of pollutants in the CZ compartments. The O_ZNS observatory consists of a well prospecting the entire thickness of the VZ up to the water table, with a finite diameter of ~ 4 m and a depth of ~ 20 m. The site is located in the Beauce region, in a heterogeneous carbonaceous formation, with a typical sequence (from top to bottom): ground/cryoturbated limestone / limestone marl / fractured micritic limestone. The well will be equipped with environmental monitoring, soil, and subsoil imaging tools in order to understand reactive transport phenomena and exchanges of mass and heat between phases (water – rock – gas) throughout the continuum «Soil – Unsaturated Zone – Capillary Fringe – Aquifer.
Beyond the equipment itself, O_ZNS aims also at becoming a place to discuss the scientific issues related to unsaturated geological media. This can be either naturally developed within the CZ compartments, or created by industrial purposes at various depths in the underground for CO2 and energy vectors storage and extraction of non-wetting energy substances where the active interfaces between phases play a key role in mass and energy exchanges inducing important petrophysical evolutions of targeted reservoirs and geological structures.
The workshop aims at gathering high-level scientists, to share their points of view, methodologies, certainties and open questions, within a pluridisciplinary and transversal approach to tackle complex problems. The exchanges are organized around the mechanistic understanding and the spatialized phenomenology of the multiphasic reactive transport within unsaturated hydrosystems impacted by global changes and man activities, as are the critical zone, the depleted aquifers, the deep underground targeted for nuclear wastes, energy and CO2 storages, and associated environmental issues.
Unsaturated hydrosystems express a multiplicity of coupled problems that can be tackled by a large range panel of scientists coming from diverse community and horizons: geologists, hydrogeophysists, soil and sedimentary scientists including thos turned to the structure of the reservoirs and petrophysics, carbonate rocks and karst sciences, field – experimental – theoretical geochemists, physical chemists of natural systems, fluid mechanics scientists, specialists into georeferenced mapping and information systems, geostatistics applied to environmental risk assessment and vulnerability maps, and associated geoscience domains.
Beyond the scientific themes, a key aspect of the workshop is the scale debate (from cap rocks and reservoirs of deep geosystems to the micro-models of the Lab-on-a-Chip emerging approach), with the familiar upscaling-downscaling issues to identify critical surfaces for mass/heat exchanges with associated electrokinetic and electrochemical processes. The workshop will gather scientists and engineers from academic laboratories, with specialists coming from the industry R&D groups, facing through different pathways, practices to the anthropogenic and global change pressure on the natural resources, and induced ecological issues.
The workshop is organized over two days as an open debate and free brainstorming among the participants, informal but intense and highly focused. To do this, the agenda of these two days (June 27 and 28) is structured as follows.
- the 1st day is focused on two main themes, with some dense lectures (10-15 mn) guiding the brainstorming of the group. Each lecturer has in charge the animation of a further dynamic stimulating very open and participative debate (20-30 mn) sharing and pushing deeply the thinking and questions emerging from the audience. At the end of each theme of discussions, a general synthesis and output will be lively elaborated to capitalize and mutualize new outcomes to progress in the shared steps of constructive discussions.
- the 2nd day, four round tables would have in charge of an extended and deepening exploitation of the challenges collected on the 1st day, re-expressed within the real context of O_ZNS and open perspectives. The workshop will come to the end with a final synthesis of the exchanges outcomes during the last half-day.
During these two scientific days of the workshop, each participant may propose a focused pitch of 3-5 minutes to contribute to the open debate and to stimulate the group brainstorming.
Academics, Industrials, The people in-between
- Dr Mohamed Azaroual, Earth Sciences Institute of Orléans (ISTO) / University of Orléans, CNRS, French Geological Survey (BRGM) – FR
- Prof. Lionel Mercury, Earth Sciences Institute of Orléans (ISTO) / University of Orléans, CNRS, French Geological Survey (BRGM) – FR
- Dr Mohamed Azaroual, ISTO / University of Orléans, CNRS, BRGM – FR
- Prof. Lionel Mercury, ISTO / University of Orléans, CNRS, BRGM – FR
- Dr Christophe Tournassat, ISTO / University of Orléans, CNRS, BRGM – FR
- Dr Pierre Toulhoat, BRGM – FR
- Dr Susan Hubbard, LBNL – US
- Dr Yuxin Wu, LBNL – US
- Dr Nathalie Dörfliger, BRGM – FR
- Dr Gilles Grandjean, BRGM – FR
- Dr Dani Or, ETH Zurich – CH
- Dr André Revil, ISTerre – FR
- Dr François Robida, BRGM – FR
- Dr Charles Gumiaux, ISTO / University of Orléans, CNRS, BRGM – FR
- Dr Benoit Noetinger, IFP EN – FR
- Dr Renaud Toussaint, IPGS – FR
THURSDAY JUNE 27TH 2019
THEME 1: THE “FOUNDING STONES” – EACH CONFERENCE IS FOLLOWED BY 3 FOCUSED PITCHS
- 09:00 Dr Mohamed Azaroual – Renewing conceptualization combining laboratory and fields, measurements and modelling, nm- to km-scales: the DNA of O_ZNS platform
- 09:45 Prof. Lionel Mercury – Critical interfaces as localized gradients & downward fluxes as dissipative flows: tracking the ‘homogenization’ of the energy and mass transfers
- 10:30 Dr Dani Or – Beyond additivities of phenomena at all scales: the synergistic and cooperative processes between thermal, chemical, mechanical, biological compartments
- 11:15 Break
- 11:30 Dr Pierre Toulhoat – Mechanistic-local vs. spatialized-distributed representations, geochemical vs.geophysical signatures, fields vs. labs: how to read deeply the nature?
- 12:15 Dr Yuxin Wu – Specificities of mesoscale: what are the relevant tools and relevant workflows to link laboratory & fields?
General synthesis of the highlights and the main outcomes.
THEME 2: THE GEOSCIENCES CHALLENGES AND COUPLED/UNCOUPLED PROCESSES – EACH CONFERENCE IS FOLLOWED BY 3 FOCUSED PITCHS
- 14:00 Dr André Revil – Couplings coefficients in geophysics: a tool toward quantification and a mine of second order information for understanding key mechanisms. What are the interdisciplinary bridges?
- 14:45 Dr Benoit Noetinger – A critical review of upscaling-downscaling procedures from geosciences perspective = mean-field petrophysic properties, heterogeneities. What are the relevant scales to capture meaningful signal?
- 15:30 Dr Mohamed Azaroual – Bridging the partial derivative equations of flow, with the algebraic formulations of thermo-kinetic approaches = key mechanisms to capture, recent advancements and perspectives
- 16:15 Break
- 16:30 Dr Renaud Toussaint – Imagery, scaling and heterogeneities = looking for the key sizes of the attainable parameters, or for the key parameters at the relevant integration scales
- 17:15 Prof. Lionel Mercury – Geological Lab-on-a-Chip (GLoC) and the analogy problem in Earth Sciences = validating and/or guiding new modelling schemes and coupling levels
General synthesis of the highlights and the main outcomes.
FRIDAY JUNE 28TH 2019
ROUND TABLE 1
- 08:30 Dr Nathalie Dörfliger, Dr Jean Borgomano, Dr Emmanuelle Poli (tbc) – Static structures – dynamic properties relationships
Karst developments, porous/fractured & dual media
Petrophysic properties of the carbonate rocks
Conceptualizing the mass flows and numerical models
Hosts vs. guests or Container vs. Content – key scientific challenges
ROUND TABLE 2
- 09:30 Dr Gilles Grandjean, Dr Renaud Toussaint (tbc), Dr André Revil – Imagery, spatialization and discontinuities in geological bodies
Physical chemical of interfaces and physical signatures
Data acquisition, localization, interpolation and join interpretations
Visible and supposed/interpreting discontinuities
Scales and supports to tackle the locks: O_ZNS observatory // the mesoscale platform PRIME // EcoSENSE // in the labs: flow through columns and GLoCs // modelling issues (hybrid mesh; deterministic + stochastic = predictivity; mechanistic calibration; micro-continuum approach)
- 10:30 Break
ROUND TABLE 3
- 11:00 Dr Mohamed Azaroual, Prof. Lionel Mercury, Dr Christophe Tournassat – Dynamics and couplings
Interfaces = capturing discontinuities, concentrated driving forces, an aggregation area
Buffered zones, quasi-steady states, reactive/moving fronts
The inverse models, the role of the ghost zones and ephemeral phenomena
From fields to the lab, from labs to model, and back to the fields
The virtuous loop: from research to training, from training to the engineering & geotechnological needs and back to research
ROUND TABLE 4
- 13:30 Dr Raphaël Canals, Dr Laurent Longuevergne, Dr Yuxin Wu – Smart sensors for environment and geosciences
Passive samplers and physical chemical monitoring tools
How to install multi-parameter monitoring measurements for high resolution and massive data generation?
Smart architecture of multidisciplinary monitoring technics (T, µmovements,)
ROUND TABLE 5
- 14:30 Dr Deb Agarwal, Dr Charles Gumiaux, Dr François Robida – Artificial intelligence, machine learning, deep learning and beyond for environmental issues
Machine and deep learning for spatial environmental data
How novel data science, data mining, and artificial intelligence techniques can innovate and inform environmental modeling practices,
Interoperability & Preparing and Architecturing for Machine Learning
- 15:30 Break
- 16:00 General synthesis of the workshop – What are the main outcomes? What can we expect, who will do, when/where re-meeting to record advances and update the issues and objectives?
PARTNERS OF THE EVENT
For registration, http://www.lestudium-ias.com/event/knowledge-s-frontiers-water-unsaturated-hydrogeosystems-interface-dynamics-heterogeneities or contact Mohamed AZAROUAL (firstname.lastname@example.org)