SIMPA - ACTIVITATI

 

Proiectul "Platforma de gestiune a apei subterane din mediul sedimentar in zone urbane - SIMPA" este impartit in sase etape de implementare. In cadrul acestor etape se desfasoara activitati de cercetare stiintifica. Aceste activitati sunt:

  • A1. Analiza pentru dezvoltarea de unelte software pentru integrarea datelor stratigrafice si geologice;
  • A2. Definirea metodologiilor de construire a unui model geologic 3D in medii sedimentare;
  • A3. Construirea unei platforme integrate de date spatiale geologice si hidrogeologice pe suport SIG;
  • A4. Extrapolarea si extinderea proprietatilor hidraulice utilizand tehnici deterministe si geostatistice;
  • A5. Dezvoltarea tehnicilor suport pentru selectarea in mod corespunzator a metodologiilor de modelare hidrogeologica;
  • A6. Dezvoltarea tehnicilor suport pentru discretizarea in mod corespunzator a domeniului (spatiu/timp);
  • A7. Dezvoltarea tehnicilor de integrare a parametrilor hidraulici (pentru modele deterministe sau probabiliste) de la date punctuale si/sau reale extrase din metodologii diverse (date petrofizice, teste geotehnice, teste hidraulice etc);
  • A8. Construirea unui model 3D pentru principalele suprafete stratigrafice ale sistemului acviferului aluvionar Moesic bazat pe date geospatial;
  • A9. Elaborarea modelelor hidrogeologice 3D (deterministe si probabiliste) de distributie a proprietatilor hidraulice cu privire la proprietatile petrografice, limitele si legaturile dintre sedimentele sistemului acvifer Moesic;
  • A10. Modelarea curgerii si transportului in sistemul acvifer Moesic bazat pe modele geologice si geostatistice obtinute;
  • A11. Construrea modelului conceptual al evolutiei platformei Moesice;
  • A12. Realizarea unui studiu privind relatia dintre apele subterane si factorii de contaminare;
  • A13. Realizarea unui studiu privind interactiunea dintre apele subterane si lucrarile civile;
  • A14. Realizarea unui scheme UML pentru un model cadru 3D de ape subterane in mediile sedimentare;
  • A15. Realizarea unei extinderi a schemei GeoSciML ca standard de transfer de date geospatiale pentru un model cadru 3D al apelor subterane in medii sedimentare.

Toate aceste activitati sunt sustinute de doua activitati de achizitie de date, masuratori de terene, teste hidrogeologice, geofizice, activitati menite sa populeze baza de date necesara desfasurarii activitatilor de cercetare.

 

 
 
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SEMINARIO DEL GRUPO DE

HIDROLOGÍA SUBTERRÁNEA

UNIVERSIDAD POLITÉCNICA DE CATALUÑA

"Experimental Upscaling of Flow and Transport in Porous Media"

(autores: A. Englert, N. Güting, T. Vaitl, T. Griese and T. Gökpinar)

a cargo de

Andreas Englert (Ruhr-University Bochum)

 

Día: MIÉRCOLES, 5 de Octubre de 2011

Hora: 12.15 hrs.

Lugar: Aula CIHS (Planta Baja). Departamento Ingeniería del Terreno (módulo D2-UPC).

Andreas Englert (Ruhr-University Bochum)

Día: MIÉRCOLES, 5 de Octubre de 2011

Hora: 12.15 hrs.

Lugar: Aula CIHS (Planta Baja). Departamento Ingeniería del Terreno (módulo D2-UPC).

Abstract:

While the physics of mixing and reaction is well understood at the pore scale, the quantification of these processes at the scales relevant for applications is highly challenging. The inability to sample all the subsurface spatial heterogeneity implies that the processes involved need to be averaged. The loss of information induced by this procedure causes anomalous behaviors of the upscaled dispersion and reaction rates. As mathematical and numerical upscaling of such processes is challenging and such upscaling procedures need to be verified to become useful for proper transport prediction, the project here focuses on experimental laboratory scale upscaling of flow and transport. 
In a first study we examined the potential of laboratory sandbox experiments and studied in detail the impact of the injection near field on the larger scale transport process. Thereto we filled a sandbox with sediments, which were characterized for hydraulic conductivity prior to filling. The latter was then accomplished in such way that different source zone release conditions were arranged by modifying the hydraulic conductivity of injection near-field, while the surrounding hydraulic conductivity field remained unchanged. The experiments in this first sandbox model gave us confidence in laboratory sandbox models and showed that source zone release conditions are of importance for plume development. In detail, we found that source zone release conditions affect the first and second temporal moments, corresponding to the mean arrival time and the spreading of breakthrough curves and the spatial spreading of solute plumes in both the longitudinal and the transverse direction. We further found that in future experiments monitoring of the injection function and subsequent consideration of the measured injection function in the analysis of breakthrough curves might be beneficial for proper parameter estimation. 
In a second study we examined flow and transport in cube shaped sediment samples before and after freezing. Thereto we developed a cube shaped experimental setup, which allows for fill of sediment, performance of flow and transport experiments, freezing of the entire apparatus and withdrawal of a frozen sediment cube from the apparatus. This is an ongoing study. However, first results suggest that the apparatus works and there are only small changes in flow and transport parameters pre- and post- freezing. This is promising for the following experiments. In future studies the frozen sediment cubes will be utilized to arrange heterogeneous sediment formations in sandboxes. Thereto development of an apparatus is ongoing, which will allow to utilize the well explored frozen sediment cubes from experiments in the cube shaped experimental setup. Such experiments will allow experimental upscaling from the dm- to m-scale of the following processes: flow, conservative transport, reactive transport, reactive transport including feedbacks (precipitation and dissolving).

El seminario se podrá ver publicado la próxima semana en la página del grupo: www.h2ogeo.upc.es