Laboratoire Eau Environnement et Systèmes Urbains (Leesu)

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840.
titre
The role of turbulence in the deposition of intrinsically buoyant MPs
auteur
Marziye Molazadeh, Guilherme Calabro-Souza, Fan Liu, Bruno Tassin, Lorenzo Rovelli, Andreas Lorke, Rachid Dris, Jes Vollertsen
article
, 2024, 911, pp.168540. ⟨10.1016/j.scitotenv.2023.168540⟩
titre
Climate change and rivers: The promise offered by infrastructure
auteur
Julie Gobert
article
, 2023, 8, pp.100077. ⟨10.1016/j.totert.2023.100077⟩
titre
A crisis of lake hypoxia in the Anthropocene: The long-term effects of climate and nutrients
auteur
Laura Soares, Jean-Philippe Jenny, Olivia Desgué-Itier, Cécilia Barouillet, Damien Bouffard, Céline Casenave, Domaizon Isabelle, Victor Frossard, Nelson Hairston, Andrea Lami, Bruno Lemaire, Gaël Many, Marie-Elodie Perga, Georges-Marie Saulnier, Frédéric Soulignac, Brigitte Vinçon-Leite
article
, 2023, ⟨10.21203/rs.3.rs-3234938/v1⟩
titre
Think global-act local: the challenge of producing actionable knowledge on transboundary climate risks at the sub-national level of governance.
auteur
Carlo Aall, Tara Botnen Holm, Adeline Cauchy, Florence Rudolf, Katy Harris, Marta Jansen, Julie Gobert, Frida Lager, Blandine Arvis, Muriel Bour
article
, 2023, 5, ⟨10.3389/fclim.2023.1170142⟩
titre
A New Technique for Resolving Benthic Solute Fluxes: Evaluation of Conditional Sampling Using Aquatic Relaxed Eddy Accumulation
auteur
Guilherme Calabro-Souza, Andreas Lorke, C. Noss, P. Dubois, M. Saad, C. Ramos-Sanchez, R. Moilleron, Brigitte Vinçon-Leite, M. Jodeau, Bruno Lemaire
article
, 2023, 10 (9), pp.e2023EA003041. ⟨10.1029/2023EA003041⟩

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Séminaire d’Allen Hunt le 14 mars 2011

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Séminaire d’Allen Hunt le 14 mars 2011

Dans le cadre des séminaires du LEESU, le professeur Allen Hunt, de l’université Wright State (USA) a fait une intervention intitulée "Solute dispersion in porous media" le lundi 14 mars à l’École des Ponts ParisTech, à Champs sur Marne.

Le résumé de son séminaire est :

Percolation cluster statistics and critical path analysis can be combined to generate the probability that a given volume of a porous medium can be covered by a network of paths with a given minimum conductance value. The topology of percolation clusters can then be applied to find the time required for solutes to cross such clusters. An appropriate probabilistic identity gives the probability that solute will arrive at, say, the right end of the volume if it enters the left end at a given time. The calculation yields the observed distribution of arrival times in simulations as well as the long-time tail of the distribution in fracture flow. The spatial moments are obtained from an analogous calculation for the spatial distribution at an instant in time. When the input distribution of local conductance values is monomodal with a single scale of heterogeneity and in the case that diffusive processes are explicitly neglected, the output distribution of dispersivity values matches a compilation of 2200 observation over ten orders of magnitude of length scale. This result requires a complete rethinking of the role of multiple scales of heterogeneity as well as a reevaluation of the appropriateness of stochastic subsurface hydrology and the role of diffusion-like processes in dispersion.