Laboratoire Eau Environnement et Systèmes Urbains (Leesu)

Dernières publications

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922.
titre
Monitoring microplastics in the Seine River in the Greater Paris area
auteur
Cleo Stratmann, Rachid Dris, Johnny Gasperi, Frans Buschman, Adriaan Markus, Sabrina Guerin, A. Dick Vethaak, Bruno Tassin
article
, 2024, 12, ⟨10.3389/feart.2024.1386547⟩
titre
Litter in French urban areas — Part 2: transport dynamic and fluxes in stormwater
auteur
Lauriane Ledieu, Romain Tramoy, David Mabilais, Sophie Ricordel, Marie-Laure Mosini, Alexandra Mosset, Bernard Flahaut, Laetitia Pineau, Zoé Bridant, Eric Bouchet, Clémence Bruttin, Fabrice Rodriguez, Bruno Tassin, Johnny Gasperi
article
, 2024, ⟨10.1007/s11356-024-33774-0⟩
titre
Fluorescence spectroscopy for tracking microbiological contamination in urban waterbodies
auteur
Natália Angelotti de Ponte Rodrigues, Rémi Carmigniani, Arthur Guillot-Le Goff, Françoise S Lucas, Claire Therial, Manel Naloufi, Aurélie Janne, Francesco Piccioni, Mohamed Saad, Philippe Dubois, Brigitte Vinçon-Leite
article
, 2024, 6, ⟨10.3389/frwa.2024.1358483⟩
titre
Séparation à la source des excrétats : bases pour des règles professionnelles
auteur
Florent Brun, Fabien Esculier, Bernard de Gouvello
article
, 2024, GE1029v1, ⟨10.51257/a-v1-ge1029⟩
titre
Small-Size Microplastics in Urban Stormwater Runoff are Efficiently Trapped in a Bioretention Cell
auteur
Kelsey Smyth, Shuyao Tan, Tim van Seters, Johnny Gasperi, Rachid Dris, Jennifer Drake, Elodie Passeport
article
, 2024, ⟨10.1021/acsestwater.4c00037⟩

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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.