 |
 |
 |
Journal articles
Deterministic modelling of the cumulative impacts of underground structures on urban groundwater flow and the definition of a potential state of urban groundwater flow: example of Lyon, France
Abstract : Underground structures have been shown to have a great influence on subsoil resources in urban aquifers. A methodology to assess the actual and the potential state of the groundwater flow in an urban area is proposed. The study develops a three-dimensional modeling approach to understand the cumulative impacts of underground infrastructures on urban groundwater flow, using a case in the city of Lyon (France). All known underground structures were integrated in the numerical model. Several simulations were run: the actual state of groundwater flow, the potential state of ground- water flow (without underground structures), an intermediate state (without impervious structures), and a transient simulation of the actual state of groundwater flow. The results show that underground structures fragment groundwater flow systems leading to a modification of the aquifer regime. For the case studied, the flow systems are shown to be stable over time with a transient simulation. Structures with drainage sys- tems are shown to have a major impact on flow systems. The barrier effect of impervious structures was negligible because of the small hydraulic gradient of the area. The study demon- strates that the definition of a potential urban groundwater flow and the depiction of urban flow systems, which involves understanding the impact of underground structures, are im- portant issues with respect to urban underground planning.
https://hal-sde.archives-ouvertes.fr/hal-01369493
Contributor : Nathalie Lyvet Connect in order to contact the contributor
Submitted on : Wednesday, September 21, 2016 - 10:14:51 AM
Last modification on : Tuesday, May 24, 2022 - 1:34:02 PM
Contributor : Nathalie Lyvet Connect in order to contact the contributor
Submitted on : Wednesday, September 21, 2016 - 10:14:51 AM
Last modification on : Tuesday, May 24, 2022 - 1:34:02 PM