title: Ecological Engineering Approaches to Improve Hydraulic Properties of Infiltration Basins Designed for Groundwater Recharge.
abstract: Infiltration systems are increasingly used in urban areas for groundwater recharge. The reduction of sediment permeability by physical and/or biological processes is a major problem in management of infiltration systems often requiring expensive engineering operations for hydraulic performance maintenance. To reduce these costs and for the sake of sustainable development, we proposed to evaluate the ability of ecological engineering approaches to reduce the biological clogging of infiltration basins. A 36-day field-scale experiment using enclosures was performed to test the influences of abiotic (light reduction by shading) and biotic (introduction of the macrophyte Vallisneria spiralis (L.) or the gastropod Viviparus viviparus (Linnaeus, 1758)) treatments to limit benthic biofilm biomass and to maintain or even increase hydraulic performances. We coupled biological characterization of sediment (algal biomass, bacterial abundance, total organic carbon, total nitrogen, microbial enzymatic activity, photosynthetic activity, and photosystem II efficiency) with hydraulic conductivity measurements to assess the effects of treatments on sediment permeability. The grazer Viviparus viviparus significantly reduced benthic biofilm biomass and enhanced hydraulic conductivity. The other treatments did not produce significant changes in hydraulic conductivity although Vallisneria spiralis affected photosynthetic activity of biofilm. Finally, our results obtained with Viviparus viviparus are promising for the development of ecological engineering solutions to prevent biological fouling in infiltration systems.
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Morgane
authors.initials: M
authors.lastname: Gette-Bouvarot
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Volatier
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Lassabatere
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Damien
authors.initials: D
authors.lastname: Lemoine
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: Simon
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Cécile
authors.initials: C
authors.lastname: Delolme
authors.affiliation: UMR 5023 LEHNA, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENTPE, 6 rue Raphaël Dubois, 69622 Villeurbanne, France.
authors.forename: Florian
authors.initials: F
authors.lastname: Mermillod-Blondin
mesh_terms: D018441:Biofilms; D004463:Ecology / Q000379:methods*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005602:France; D019015:Geologic Sediments / Q000737:chemistry; D060587:Groundwater / Q000737:chemistry*; D006868:Hydrolysis; D016014:Linear Models; D010788:Photosynthesis; D045332:Photosystem II Protein Complex / Q000378:metabolism; D014867:Water
chemical_list: D045332:Photosystem II Protein Complex; D014867:Water