Skip to Main content Skip to Navigation
Theses

Modélisation des contrôles climatiques, topographiques, géologiques et anthropiques sur les écoulements souterrains en domaine de socle

Abstract : This thesis deals with groundwater flow rate and distribution at the regional / continental scale. It addresses the partitioning between groundwater and surface water, the paths and travel times of groundwater, impact and vulnerability of pumping. The role of climatic, topographic and geologic factors is investigated. We consider these questions in the case of hard rock aquifers, which are highly heterogeneous aquifers mainly controlled by subsurface erosion and tectonic fracturing. Our work is based on the numerical modelling of free surface porous flow under the hypothesis of stationary constraints. We specially focus on the interactions of the water table with the land-surface topography. These interactions are a key point to understand groundwater flow structures. Based on an local adaptation scheme for finite volumes, we developed an efficient numerical method to solve this highly non-linear problem. We then performed a non-dimensional study of the controlling parameters of groundwater flow in an "elementary" basin representing a first-order idealized hydrogeological catchment. Results contribute to the deep understanding of fundamental controls revealing a relevant basis for the study of more complex systems. Considering more realistic configurations representative of hard rock aquifers, we identify the main processes that govern groundwater flow under recharge and pumping constraints. In particular, we present a conceptual model to deal with the impact of pumping in a fractured aquifer on natural groundwater discharge zones.
Complete list of metadata

Cited literature [161 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00734265
Contributor : Sébastien Erhel <>
Submitted on : Friday, September 21, 2012 - 11:20:34 AM
Last modification on : Thursday, January 14, 2021 - 11:41:33 AM
Long-term archiving on: : Friday, December 16, 2016 - 3:28:04 PM

Identifiers

  • HAL Id : tel-00734265, version 1

Citation

Etienne Bresciani. Modélisation des contrôles climatiques, topographiques, géologiques et anthropiques sur les écoulements souterrains en domaine de socle. Hydrologie. Université Rennes 1, 2011. Français. ⟨NNT : 2011REN1S170⟩. ⟨tel-00734265⟩

Share

Metrics

Record views

720

Files downloads

1828