Dissertation/ Thesis
Physical and hydrological signification of the spectral information contained in the hydrodynamic signal at the outlet of karst systems ; Signification physique et hydrologique de l'information spectrale contenue dans le signal hydrodynamique à l'exutoire des systèmes karstiques.
| العنوان: | Physical and hydrological signification of the spectral information contained in the hydrodynamic signal at the outlet of karst systems ; Signification physique et hydrologique de l'information spectrale contenue dans le signal hydrodynamique à l'exutoire des systèmes karstiques. |
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| المؤلفون: | Dufoyer, Adeline |
| المساهمون: | Morphodynamique Continentale et Côtière (M2C), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Normandie Université, Nicolas Massei, Nicolas Lecoq |
| المصدر: | https://theses.hal.science/tel-02976892 ; Sciences de la Terre. Normandie Université, 2019. Français. ⟨NNT : 2019NORMR147⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2019 |
| المجموعة: | Normandie Université: HAL |
| مصطلحات موضوعية: | Karst, Hydrogeological modeling, Autocorrelation, Cross-correlation, Fourier spectra, Multiresolution analysis, Signal decomposition, Modélisation hydrogéologique, Autocorrélation, Inter-corrélation, Spectres de Fourier, Analyse multirésolution, Décomposition du signal, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
| الوصف: | Globally, major socio-economic challenges lie on karst systems, both for drinking water supply to populations and for deposits exploitation. Karst systems are defined, by De Marsily (1984), as environments in which "heterogeneity reaches its paroxysm": the physical patterns characterizing karst domains are particularly varied and the hydrodynamic responses are undeniably complex and non-linear. Today, it is still not possible to precisely define the heterogeneities organization of these aquifers although many studies have been carried out on their overall functioning. These studies are based on the only information generally available on these systems: precipitation on the studied watershed, flow rates recorded at the outlet, well-located monitoring of water levels, concentrations or turbidity, and local estimated hydrodynamic properties such as the hydraulic conductivity of the aquifer or the storage coefficient. In recent years, several works have shown the interest of applying correlative and spectral analyzes on time series recorded on karst systems in order to interpret them hydro(geo)logical functioning. This thesis work explored the potential of this hydrological signal analysis methods as an aid to the interpretation and inference of physical and hydrogeological characteristics (karst networks geometry, exchanges between conduit networks and the surrounding porous matrix, recharge mode including diffuse and point-source one). This study was based on a coupling approach of direct modeling flows through synthetic karst systems, and the statistical and spectral processing of these simulated signals. The modeled domains were built according to different complexity degrees: from very simple arbitrary cases to complex cases corresponding to realistic systems. The flows in these synthetic networks were simulated with the physics-based hydrogeological model developed by the BRGM, MARTHE (Thiéry, 2015), and more particularly thanks to the “Drains-Conduits” package allowing to couple matrix, karst conduits and ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| Relation: | NNT: 2019NORMR147; tel-02976892; https://theses.hal.science/tel-02976892; https://theses.hal.science/tel-02976892/document; https://theses.hal.science/tel-02976892/file/adelinedufoyer2.pdf |
| الاتاحة: | https://theses.hal.science/tel-02976892 https://theses.hal.science/tel-02976892/document https://theses.hal.science/tel-02976892/file/adelinedufoyer2.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.861F106D |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |