This page has only limited features, please log in for full access.
Bioretention systems are increasingly used worldwide to mitigate the impacts of urban stormwater runoff on the water cycle. Being able to accurately model physical processes occurring within these systems is critical to their design and to being able to predict their performance. Most popular urban hydrological models must now integrate a low impact development (LID) toolbox to keep up with current practices. We aimed to develop and test a generic model of bioretention systems that can serve as a targeted compromise between oversimplification without any physical basis, on the one hand, and physical soundness requiring a large number of parameters for calibration, on the other. The model accounts for evapotranspiration, overflow, infiltration into the filter (single permeability behavior), exfiltration to surrounding soils, along with underdrain discharge. The model was tested against field data from a monitored bioretention basin in Melbourne, Australia. Based on 22 rainfall events (two used for calibration and 20 for validation), results showed that the simulated underdrain outflow rates and their temporal dynamic were well replicated (considering the validation phase with 20 rainfall events: median NSE = 0.75, median PBIAS = −22%, median RMSE = 0.48 l/s). Despite good performance for outflow rates, there was a discrepancy observed in magnitude between simulated and measured water levels within the bioretention basin. The model therefore seems a useful first step towards the design of a user-friendly model for assessing both performance and impact of bioretention basins for catchment-scale flow regime management.
Jérémie Bonneau; Gislain Lipeme Kouyi; Laurent Lassabatere; Tim D. Fletcher. Field validation of a physically-based model for bioretention systems. Journal of Cleaner Production 2021, 312, 127636 .
AMA StyleJérémie Bonneau, Gislain Lipeme Kouyi, Laurent Lassabatere, Tim D. Fletcher. Field validation of a physically-based model for bioretention systems. Journal of Cleaner Production. 2021; 312 ():127636.
Chicago/Turabian StyleJérémie Bonneau; Gislain Lipeme Kouyi; Laurent Lassabatere; Tim D. Fletcher. 2021. "Field validation of a physically-based model for bioretention systems." Journal of Cleaner Production 312, no. : 127636.
Background Total suspended solids (TSS) loads carried by stormwater runoff is a major pollutant source on receiving water bodies. Stormwater ponds are widely used for controlling TSS discharge. However, the trap efficiency is not satisfactory because it is affected by many complex factors, which are not fully understood. Therefore, there is a necessity to gain insight into the sediment process in stormwater ponds for optimization design of stormwater ponds. To address this issue, we propose a novel modeling framework based on discrete phase model (DPM), aiming to fully represent the sediment transport, settling, and resuspension at grain scale under time-dependent conditions. Results In the newly proposed method, heterogeneous characteristics of sediments’ loads, varying flows and sediment loads, settling and resuspension effect at grain scale, time-dependent conditions, and turbulent effect are all well considered. The proposed models have been coded with C language and hooked in computational fluid dynamics software Fluent, and the methods were tested with a case of laboratory experimental setup. Different bed boundary conditions are tested and compared with the observation data for optimization parameters’ identification. The simulation results demonstrated that the physically based DPM with the newly developed method can well reproduce the evolution of sediment transport, settling and resuspension behaviors compared with the scale experiment. Conclusions The newly proposed method can accurately predict the trap efficiency and temporal–spatial sediment distribution. The decomposition of bed load motion at grain scale is a necessary and valid way to represent the sedimentation process in shallow ponds. The developed model could be a tool to help us gain insight into the sediment transport phenomena at grain scale in shallow tanks since it can provide detailed information which the experiment cannot.
Hexiang Yan; Nina Vosswinkel; Simon Ebbert; Gislain Lipeme Kouyi; Rainer Mohn; Mathias Uhl; Jean-Luc Bertrand-Krajewski. Numerical investigation of particles’ transport, deposition and resuspension under unsteady conditions in constructed stormwater ponds. Environmental Sciences Europe 2020, 32, 1 -17.
AMA StyleHexiang Yan, Nina Vosswinkel, Simon Ebbert, Gislain Lipeme Kouyi, Rainer Mohn, Mathias Uhl, Jean-Luc Bertrand-Krajewski. Numerical investigation of particles’ transport, deposition and resuspension under unsteady conditions in constructed stormwater ponds. Environmental Sciences Europe. 2020; 32 (1):1-17.
Chicago/Turabian StyleHexiang Yan; Nina Vosswinkel; Simon Ebbert; Gislain Lipeme Kouyi; Rainer Mohn; Mathias Uhl; Jean-Luc Bertrand-Krajewski. 2020. "Numerical investigation of particles’ transport, deposition and resuspension under unsteady conditions in constructed stormwater ponds." Environmental Sciences Europe 32, no. 1: 1-17.
Mass transfer coefficients at the gas ‐ liquid interface were investigated for different flow configuration systems, a stirred tank reactor and a gravity pipe. Computational fluid dynamics (CFD) simulations were performed for all tested experimental conditions. Since a poorly soluble gas (oxygen) was used, the overall mass transfer coefficient was clearly correlated to the hydrodynamic conditions in the liquid phase. However, a generic correlation between averaged interfacial liquid velocity and mass transfer coefficients was not found for both geometries. Finally, the averaged turbulent kinetic energy (TKE) at the interface is the most relevant parameter that was correlated to the mass transfer coefficient for both systems. The same relationship between oxygen mass transfer coefficient KL, O2 and TKE () can be applied for the two geometries investigated. This article is protected by copyright. All rights reserved.
Fanny Springer; Lucie Carrera; Gislain Lipeme Kouyi; Alejandro Claro‐Barreto; Pierre Buffiere. The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface. The Canadian Journal of Chemical Engineering 2020, 98, 1191 -1201.
AMA StyleFanny Springer, Lucie Carrera, Gislain Lipeme Kouyi, Alejandro Claro‐Barreto, Pierre Buffiere. The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface. The Canadian Journal of Chemical Engineering. 2020; 98 (5):1191-1201.
Chicago/Turabian StyleFanny Springer; Lucie Carrera; Gislain Lipeme Kouyi; Alejandro Claro‐Barreto; Pierre Buffiere. 2020. "The liquid‐gas mass transfer coefficient in open channel flow is correlated to the turbulent kinetic energy at the interface." The Canadian Journal of Chemical Engineering 98, no. 5: 1191-1201.
Elevated trace metal concentrations in sediments pose a major problem for the management of stormwater detention basins. These basins provide a nature-based solution to remove particulate pollutants through settling, but the resuspension of these contaminated deposits may impact the quality of both surface and groundwater. A better understanding of trace metal distribution will help to improve basin design and sediment management. This study aims to predict the distribution of trace metal contamination in a stormwater detention basin through (i) investigation of the correlation between metal content in sediments and their settling velocity, and (ii) the coupling of such correlation with a Lagrangian Discrete Phase Model (LDPM). The correlation between Fe, Cr, Cu, Ni, Pb contents and the settling velocity is firstly investigated, based on the sediments collected from 6 sites (inlet and 5 traps at the bottom of a detention basin situated in Chassieu, France) during 5 campaigns in 2017. Results show that Fe is strongly correlated to settling velocity and can be considered as a good indicator of trace metal contents. The derived correlation is then combined with a LDPM for the prediction of trace metal distribution, producing results consistent with in situ measurements. The proposed methodology can be applied for other stormwater basins (dry or wet). As described in this article, the interactions between hydrodynamics and sediment physico-chemical characteristics is crucial for the design and management of stormwater detention basins, allowing managers to target the highest contaminated sediments.
Xiaoxiao Zhu; Vincent Chatain; Mathieu Gautier; Denise Blanc-Biscarat; Cécile Delolme; Nathalie Dumont; Jean-Baptiste Aubin; Gislain Lipeme Kouyi. Combination of Lagrangian Discrete Phase Model and sediment physico-chemical characteristics for the prediction of the distribution of trace metal contamination in a stormwater detention basin. Science of The Total Environment 2019, 698, 134263 .
AMA StyleXiaoxiao Zhu, Vincent Chatain, Mathieu Gautier, Denise Blanc-Biscarat, Cécile Delolme, Nathalie Dumont, Jean-Baptiste Aubin, Gislain Lipeme Kouyi. Combination of Lagrangian Discrete Phase Model and sediment physico-chemical characteristics for the prediction of the distribution of trace metal contamination in a stormwater detention basin. Science of The Total Environment. 2019; 698 ():134263.
Chicago/Turabian StyleXiaoxiao Zhu; Vincent Chatain; Mathieu Gautier; Denise Blanc-Biscarat; Cécile Delolme; Nathalie Dumont; Jean-Baptiste Aubin; Gislain Lipeme Kouyi. 2019. "Combination of Lagrangian Discrete Phase Model and sediment physico-chemical characteristics for the prediction of the distribution of trace metal contamination in a stormwater detention basin." Science of The Total Environment 698, no. : 134263.
The numerical prediction of pressure drop within wall-bounded flow domains at high Reynolds numbers (Re) using a large-eddy simulation (LES) approach is a challenging task for industrial applications because the fluid domain is usually underresolved. A lattice Boltzmann method (LBM) with Bhatnagar, Gross and Krook (BGK) collision operator coupled with the Smagorinsky–Lilly turbulence model is used to model these wall-bounded turbulent flows. The near wall region is modelled using wall functions to decrease the required mesh resolution for high Re. The influence of different velocity boundary approaches and wall functions is investigated for the benchmark bi-periodic fully developed turbulent channel flow for friction Reynolds numbers (Reτ) of 1000, 2000 and 5200. This benchmark case is validated against direct numerical simulation (DNS) results for turbulent statistics of 1st and 2nd order. Based on this validation, the pressure drop of an industrial Coriolis mass flowmeter is compared to experimental data for Re up to 127 800. The error of the pressure drop calculation in underresolved grids is reduced by two orders of magnitude in comparison to a no-slip approach for curved boundaries.
Marc Haussmann; Alejandro Claro Barreto; Gislain Lipeme Kouyi; Nicolas Rivière; Hermann Nirschl; Mathias J. Krause. Large-eddy simulation coupled with wall models for turbulent channel flows at high Reynolds numbers with a lattice Boltzmann method — Application to Coriolis mass flowmeter. Computers & Mathematics with Applications 2019, 78, 3285 -3302.
AMA StyleMarc Haussmann, Alejandro Claro Barreto, Gislain Lipeme Kouyi, Nicolas Rivière, Hermann Nirschl, Mathias J. Krause. Large-eddy simulation coupled with wall models for turbulent channel flows at high Reynolds numbers with a lattice Boltzmann method — Application to Coriolis mass flowmeter. Computers & Mathematics with Applications. 2019; 78 (10):3285-3302.
Chicago/Turabian StyleMarc Haussmann; Alejandro Claro Barreto; Gislain Lipeme Kouyi; Nicolas Rivière; Hermann Nirschl; Mathias J. Krause. 2019. "Large-eddy simulation coupled with wall models for turbulent channel flows at high Reynolds numbers with a lattice Boltzmann method — Application to Coriolis mass flowmeter." Computers & Mathematics with Applications 78, no. 10: 3285-3302.
Stormwater management techniques in urban areas, such as sustainable urban drainage systems (SuDS), are designed to manage rainwater through an infiltration process. In order to determine the infiltration capacities of different SuDS and to identify their unsaturated hydraulic properties, measurements with the Beerkan method (i.e., single ring infiltration tests) were carried out on four types of common infiltration structures in an urban zone of Lyon (France): A drainage ditch with an underlying storage structure, a parking lot with a waterproof pavement that transfers runoff water toward the ditch, a vegetated hollow core slab, and an embankment of a grass-covered garden that was used as a reference for rainwater infiltration capacity. The novelty of this study lies in the use of three Beerkan estimation of soil transfer parameters (BEST) algorithms: BEST-slope, BEST-intercept, and BEST-steady to analyze infiltration data. The BEST methods are based on the analysis of the infiltration rate from transient to steady-state flow. They allow the determination of both shape and scale parameters of the soil water retention curve h(θ) and the hydraulic conductivity curve K(θ). The three BEST methods are efficient and simple for hydraulic characterization of SuDS. The study of the hydrodynamic behavior of the four structures revealed the infiltration inefficiency of some of them. Their average infiltration rates are considerably lower than the reference infiltration rain garden. The results confirmed the impact of some physical conditions, such as pore structure modification due to invasive vegetation colonization and the presence of soil organic matter, on soil hydrodynamic behavior degradation.
Sofia Bouarafa; Laurent Lassabatere; Gislain Lipeme-Kouyi; Rafael Angulo-Jaramillo. Hydrodynamic Characterization of Sustainable Urban Drainage Systems (SuDS) by Using Beerkan Infiltration Experiments. Water 2019, 11, 660 .
AMA StyleSofia Bouarafa, Laurent Lassabatere, Gislain Lipeme-Kouyi, Rafael Angulo-Jaramillo. Hydrodynamic Characterization of Sustainable Urban Drainage Systems (SuDS) by Using Beerkan Infiltration Experiments. Water. 2019; 11 (4):660.
Chicago/Turabian StyleSofia Bouarafa; Laurent Lassabatere; Gislain Lipeme-Kouyi; Rafael Angulo-Jaramillo. 2019. "Hydrodynamic Characterization of Sustainable Urban Drainage Systems (SuDS) by Using Beerkan Infiltration Experiments." Water 11, no. 4: 660.
Stormwater detention basins are significant components for the sustainable management of urban stormwater, aiming to control stormwater quantity (prevent from flooding) and quality (trap particulate pollutants by settling). The design and management of such facilities need knowledge of the hydrodynamic characteristics and the sedimentation zones for cleaning purposes. Large‐Scale Particle Image Velocimetry (LSPIV), mostly applied in riverine environments, has been proven as a low‐cost, highly efficient and convenient image‐based methodology for surface velocity measurement. In this study, LSPIV technology is employed to investigate free surface velocity in a field stormwater detention basin. The method is firstly evaluated by comparing its results with those obtained by Acoustic Doppler Velocimeter (ADV) at pilot scale. Then, the technique is applied to better understand the main flow field and to explain spatial sediment distribution within an extended stormwater detention basin. Results illustrate two main flow patterns, which are consistent with observations and preliminary simulated results. LSPIV‐based free surface velocity field measurements can be used to evaluate numerical models and as a support to predict sediment deposition zones in stormwater detention basins, and to help for their retrofit and management.
Xiaoxiao Zhu; Gislain Lipeme Kouyi. An Analysis of LSPIV‐Based Surface Velocity Measurement Techniques for Stormwater Detention Basin Management. Water Resources Research 2019, 55, 888 -903.
AMA StyleXiaoxiao Zhu, Gislain Lipeme Kouyi. An Analysis of LSPIV‐Based Surface Velocity Measurement Techniques for Stormwater Detention Basin Management. Water Resources Research. 2019; 55 (2):888-903.
Chicago/Turabian StyleXiaoxiao Zhu; Gislain Lipeme Kouyi. 2019. "An Analysis of LSPIV‐Based Surface Velocity Measurement Techniques for Stormwater Detention Basin Management." Water Resources Research 55, no. 2: 888-903.
To characterize the spatio-temporal variation of sediment ecotoxicity in a retention/detention basin, a monitoring program using the Heterocypris incongruens bioassay was carried out for 72 months (5 years) on a field basin close to Lyon in France. Results showed that the variation of ecotoxicity is relatively small from one location of the basin to another, apart from sediment sampling collected in an open-air chamber located in basin supposed to collect gross pollutants and hydrocarbons. Regarding the temporal variation of ecotoxicity, the bioassays also showed a slight variation between 6 and 72 months. On the contrary, they highlighted the high ecotoxicity of the “fresh” sediments collected during rain events using sediment traps. Additional investigations are needed to understand the period of inflexion of ecotoxicity, occurring between 24 h and 6 months. These results can be used by practitioners of urban facilities and networks to improve maintenance strategies of retention/detention basins.
Celine Becouze-Lareure; Gislain Lipeme Kouyi; Carolina Gonzalez-Merchan; Christine Bazin; Christel Sebastian; Sylvie Barraud; Yves Perrodin. Spatial and temporal dynamics of sediment ecotoxicity in urban stormwater retention basins: Methodological approach and application to a pilot site close to Lyon in France. Journal of Environmental Science and Health, Part A 2018, 53, 1123 -1130.
AMA StyleCeline Becouze-Lareure, Gislain Lipeme Kouyi, Carolina Gonzalez-Merchan, Christine Bazin, Christel Sebastian, Sylvie Barraud, Yves Perrodin. Spatial and temporal dynamics of sediment ecotoxicity in urban stormwater retention basins: Methodological approach and application to a pilot site close to Lyon in France. Journal of Environmental Science and Health, Part A. 2018; 53 (13):1123-1130.
Chicago/Turabian StyleCeline Becouze-Lareure; Gislain Lipeme Kouyi; Carolina Gonzalez-Merchan; Christine Bazin; Christel Sebastian; Sylvie Barraud; Yves Perrodin. 2018. "Spatial and temporal dynamics of sediment ecotoxicity in urban stormwater retention basins: Methodological approach and application to a pilot site close to Lyon in France." Journal of Environmental Science and Health, Part A 53, no. 13: 1123-1130.
One of the most adopted solutions in developed countries to manage stormwater is detention/retention basins which generate large quantities of sediments that have to be removed regularly. In order to manage them properly, accurate data are needed about their physical and chemical characteristics, particularly on micropollutant concentrations and their associated risk. This work consisted in a two-year sampling of dry sediments from a detention-settling basin. Priority substances, including pesticides, polybrominated diphenyl ethers (PBDE), alkylphenols and bisphenol A (BPA), were monitored. Different sites in the basin bottom were sampled in order to investigate spatial distribution of the contamination. Results show that the increase of the sediment thickness in the basin was heterogeneous with a maximum of 15 cm after two years. Pesticides and PBDE were, if detected, mainly found in low concentrations from 2 ng/g to 286 ng/g. Conversely, alkylphenols and bisphenol A were always quantified at concentrations varying from 6 ng/g to 3400 ng/g. These high levels suggest that these sediments should be managed with precautions. Spatial heterogeneity of alkylphenol ethoxylates and BPA concentrations was observed, with higher contamination of alkylphenol ethoxylates in anaerobic zones and BPA levels correlated with total organic carbon and in a lesser extent to fine particles.
Laure Wiest; Robert Baudot; Florent Lafay; Erik Bonjour; Céline Becouze-Lareure; Jean-Baptiste Aubin; Patrick Jame; Sylvie Barraud; Gislain Lipeme Kouyi; Christel Sébastian; Emmanuelle Vulliet. Priority substances in accumulated sediments in a stormwater detention basin from an industrial area. Environmental Pollution 2018, 243, 1669 -1678.
AMA StyleLaure Wiest, Robert Baudot, Florent Lafay, Erik Bonjour, Céline Becouze-Lareure, Jean-Baptiste Aubin, Patrick Jame, Sylvie Barraud, Gislain Lipeme Kouyi, Christel Sébastian, Emmanuelle Vulliet. Priority substances in accumulated sediments in a stormwater detention basin from an industrial area. Environmental Pollution. 2018; 243 ():1669-1678.
Chicago/Turabian StyleLaure Wiest; Robert Baudot; Florent Lafay; Erik Bonjour; Céline Becouze-Lareure; Jean-Baptiste Aubin; Patrick Jame; Sylvie Barraud; Gislain Lipeme Kouyi; Christel Sébastian; Emmanuelle Vulliet. 2018. "Priority substances in accumulated sediments in a stormwater detention basin from an industrial area." Environmental Pollution 243, no. : 1669-1678.
The nature and fate of urban contaminants washed by stormwater events and accumulating in a detention basin (DB) were investigated. Relations between bacterial and chemical contaminants of trapped urban sediments, and field parameters were analyzed. Fecal indicators and some pathogens known to be environmentally transmitted (Nocardia, Pseudomonas aeruginosa, and Aeromonas caviae) were tracked, and their persistence investigated. Six sampling campaigns were carried out over 3 years, using five sites including a settling chamber (SC). Aerosolized bacteria at these sites were also monitored. Deposits in the basin were made of fine particles and their content in chemical pollutants was found highly variable. High polycyclic aromatic hydrocarbon (PAH) contents were measured but only three pesticides, over 22, were detected. Deposits were significantly contaminated by fecal indicator bacteria (FIB), P. aeruginosa, A. caviae, and by Nocardia. Only A. caviae showed significant numbers in aerosolized particles recovered over the detention basin. Nocardia spp. cells heavily contaminated the SC. The efficacy of the detention basin at reducing bacterial counts per rain event and over time were estimated. A slight drop in the counts was monitored for fecal indicators but not for the other bacterial groups. Hydrodynamic parameters had a strong impact on the distribution and features of the deposits. Multiple factors impacted the fate of FIB, P. aeruginosa, A. caviae, and Nocardia cells, but in a group dependent manner. Nocardia counts were found positively correlated with volatile organic matter. FIB appeared highly efficient colonizers of the DB.
Claire Bernardin-Souibgui; Sylvie Barraud; Emilie Bourgeois; Jean-Baptiste Aubin; Celine Becouze-Lareure; Laure Wiest; Laurence Marjolet; Celine Colinon; Gislain Lipeme Kouyi; Benoit Cournoyer; Didier Blaha. Incidence of hydrological, chemical, and physical constraints on bacterial pathogens, Nocardia cells, and fecal indicator bacteria trapped in an urban stormwater detention basin in Chassieu, France. Environmental Science and Pollution Research 2018, 25, 24860 -24881.
AMA StyleClaire Bernardin-Souibgui, Sylvie Barraud, Emilie Bourgeois, Jean-Baptiste Aubin, Celine Becouze-Lareure, Laure Wiest, Laurence Marjolet, Celine Colinon, Gislain Lipeme Kouyi, Benoit Cournoyer, Didier Blaha. Incidence of hydrological, chemical, and physical constraints on bacterial pathogens, Nocardia cells, and fecal indicator bacteria trapped in an urban stormwater detention basin in Chassieu, France. Environmental Science and Pollution Research. 2018; 25 (25):24860-24881.
Chicago/Turabian StyleClaire Bernardin-Souibgui; Sylvie Barraud; Emilie Bourgeois; Jean-Baptiste Aubin; Celine Becouze-Lareure; Laure Wiest; Laurence Marjolet; Celine Colinon; Gislain Lipeme Kouyi; Benoit Cournoyer; Didier Blaha. 2018. "Incidence of hydrological, chemical, and physical constraints on bacterial pathogens, Nocardia cells, and fecal indicator bacteria trapped in an urban stormwater detention basin in Chassieu, France." Environmental Science and Pollution Research 25, no. 25: 24860-24881.
In the past ten years, governments from the European Union have been encouraged to collect volume and quality data for all the effluent overflows from separated stormwater and combined sewer systems that result in a significant environmental impact on receiving water bodies. Methods to monitor and control these flows require improvements, particularly for complex Combined Sewer Overflow (CSO) structures. The DSM-flux (Device for Stormwater and combined sewer flows Monitoring and the control of pollutant fluxes) is a new pre-designed and pre-calibrated channel that provides appropriate hydraulic conditions suitable for measurement of overflow rates and volumes by means of one water level gauge. In this paper, a stage-discharge relation for the DSM-flux is obtained experimentally and validated for multiple inflow hydraulic configurations. Uncertainties in CSO discharges and volumes are estimated within the Guide to the expression of Uncertainty in Measurement (GUM) framework. Whatever the upstream hydraulic conditions are, relative uncertainties are lower than 15% and 2% for the investigated discharges and volumes, respectively.
Ainhoa Maté Marín; Nicolas Rivière; Gislain Lipeme Kouyi. DSM-flux: A new technology for reliable Combined Sewer Overflow discharge monitoring with low uncertainties. Journal of Environmental Management 2018, 215, 273 -282.
AMA StyleAinhoa Maté Marín, Nicolas Rivière, Gislain Lipeme Kouyi. DSM-flux: A new technology for reliable Combined Sewer Overflow discharge monitoring with low uncertainties. Journal of Environmental Management. 2018; 215 ():273-282.
Chicago/Turabian StyleAinhoa Maté Marín; Nicolas Rivière; Gislain Lipeme Kouyi. 2018. "DSM-flux: A new technology for reliable Combined Sewer Overflow discharge monitoring with low uncertainties." Journal of Environmental Management 215, no. : 273-282.
Assessment of overflow discharge of combined sewer overflows (CSOs) is of great importance for pollution control in combined sewer system (CSS) since in which many pollutants is often contained during the wet weather. The relationship between water level of CSOs chamber is often used to estimate the discharge. However, it is difficult to accurately estimate the overflow discharge with limit level sensors due to the complex flow condition. A computational fluid dynamics (CFD) based method which is capable to determine the most suitable location for water level sensor is presented, aiming to improve the monitoring accuracy of overflow discharge by optimizing the locations with limit sensors. The results show that the proposed method can quantitatively find the optimized location of the sensor, coupling with the global uncertainty estimation. Therefore, the proposed method can provide more accurate monitoring information for assessing the CSOs impact on receiving water bodies, rehabilitation measures, and real time control (RTC) management.
Hexiang Yan; Kangqian Zhao; Gislain Lipeme Kouyi; Tao Tao; Kunlun Xin; Shuping Li. A CFD-Based Level Sensor Location Optimization Method for Overflow Discharge Estimation in CSOs. International Low Impact Development Conference China 2016 2017, 1 .
AMA StyleHexiang Yan, Kangqian Zhao, Gislain Lipeme Kouyi, Tao Tao, Kunlun Xin, Shuping Li. A CFD-Based Level Sensor Location Optimization Method for Overflow Discharge Estimation in CSOs. International Low Impact Development Conference China 2016. 2017; ():1.
Chicago/Turabian StyleHexiang Yan; Kangqian Zhao; Gislain Lipeme Kouyi; Tao Tao; Kunlun Xin; Shuping Li. 2017. "A CFD-Based Level Sensor Location Optimization Method for Overflow Discharge Estimation in CSOs." International Low Impact Development Conference China 2016 , no. : 1.
Les gestionnaires de réseau d'assainissement urbain sont amenés à équiper leurs réseaux à l'aide de débitmètres. Lorsqu'il n'existe pas une relation permanente permettant de relier localement la hauteur d'eau et le débit, on recourt fréquemment à la mise en place de capteurs de vitesse. Le passage de la vitesse mesurée par ces capteurs vers la vitesse moyenne dans la section implique des incertitudes difficiles à évaluer. La modélisation 3D des écoulements permet de simuler la réponse des capteurs pour évaluer ces incertitudes, et, le cas échéant, de les réduire par étalonnage numérique. Après une présentation de la démarche générale, nous l'illustrerons par un cas générique d'un site à l'aval d'un coude et par le cas spécifique d'une section complexe. Sewer network managers are more and more implementing discharge sensors within sewer networks. When no permanent relation exists between the local water depth and discharge, velocity sensors are usually installed. In such case, the velocity values measured by these sensorS must be extrapolated to reach the averaged velocity across the flow section. This extrapolation implies uncertainties which are difficult to assess. 3D modelling of the velocity field allows to simulate the response of sensors for assessing these uncertainties, and reduce them by numerical calibration. In the following text, the general methodology is first introduced and then applied to two case studies, including a bend flow and a complex section configuration.
Frédérique Larrarte; Matthieu Dufresne; Emmanuel Mignot; Gislain Lipeme Kouyi; Nicolas Riviere; José Vazquez; Claude Joannis. Débitmètrie et mécanique des fluides numérique : contribution à l'évaluation et à la réduction des incertitudes des mesures de vitesse moyenne. La Houille Blanche 2017, 103, 67 -72.
AMA StyleFrédérique Larrarte, Matthieu Dufresne, Emmanuel Mignot, Gislain Lipeme Kouyi, Nicolas Riviere, José Vazquez, Claude Joannis. Débitmètrie et mécanique des fluides numérique : contribution à l'évaluation et à la réduction des incertitudes des mesures de vitesse moyenne. La Houille Blanche. 2017; 103 (6):67-72.
Chicago/Turabian StyleFrédérique Larrarte; Matthieu Dufresne; Emmanuel Mignot; Gislain Lipeme Kouyi; Nicolas Riviere; José Vazquez; Claude Joannis. 2017. "Débitmètrie et mécanique des fluides numérique : contribution à l'évaluation et à la réduction des incertitudes des mesures de vitesse moyenne." La Houille Blanche 103, no. 6: 67-72.
Urban activities generate surface deposits over impervious surfaces that can represent ecological and health hazards. Bacteriome genetic structures of deposits washed off during rainfall events, over an urban industrial watershed, were inferred from 16 S rRNA gene (rrs) sequences generated by high throughput sequencing. Deposits were sampled over a 4 year-period from a detention basin (DB). Major shifts, matching key management practices, in the structure of these urban bacteriomes, were recorded. Correlation analyses of rrs similarities between samples and their respective concentrations in chemical pollutants, markers of human fecal contaminations (HF183) and antimicrobial resistances (integrons), were performed. Harsher environmental constraints building up in the older deposits led to an increase number of rrs reads from extremophiles such as Acidibacter and Haliangium. Deposits accumulating in the decantation pit of the DB showed an increase in rrs reads from warm blooded intestinal tract bacteria such as Bacteroides and Prevotella. This enrichment matched higher concentrations of Bacteroides HF183 genotypes normally restricted to humans. Bacteriomes of urban deposits appeared good indicators of human-driven environmental changes. Their composition was found representative of their origin. Soil particles and rain appeared to be major contributors of the inferred bacterial taxa recovered from recent deposits.
Romain Marti; Céline Bécouze-Lareure; Sébastien Ribun; Laurence Marjolet; Claire Bernardin Souibgui; Jean-Baptiste Aubin; Gislain Lipeme Kouyi; Laure Wiest; Didier Blaha; Benoit Cournoyer. Bacteriome genetic structures of urban deposits are indicative of their origin and impacted by chemical pollutants. Scientific Reports 2017, 7, 1 -14.
AMA StyleRomain Marti, Céline Bécouze-Lareure, Sébastien Ribun, Laurence Marjolet, Claire Bernardin Souibgui, Jean-Baptiste Aubin, Gislain Lipeme Kouyi, Laure Wiest, Didier Blaha, Benoit Cournoyer. Bacteriome genetic structures of urban deposits are indicative of their origin and impacted by chemical pollutants. Scientific Reports. 2017; 7 (1):1-14.
Chicago/Turabian StyleRomain Marti; Céline Bécouze-Lareure; Sébastien Ribun; Laurence Marjolet; Claire Bernardin Souibgui; Jean-Baptiste Aubin; Gislain Lipeme Kouyi; Laure Wiest; Didier Blaha; Benoit Cournoyer. 2017. "Bacteriome genetic structures of urban deposits are indicative of their origin and impacted by chemical pollutants." Scientific Reports 7, no. 1: 1-14.
H2S emission dynamics in sewers are conditioned by the mass transfer coefficient at the interface. This work aims at measuring the variation of the mass transfer coefficient with the hydraulic characteristics, with the objective of estimating H2S emission in gravity pipes, and collecting data to establish models independent of the system geometry. The ratio between the H2S and O2 mass transfer coefficient was assessed in an 8 L mixed reactor under different experimental conditions. Then, oxygen mass transfer measurements were performed in a 10 m long gravity pipe. The following ranges of experimental conditions were investigated: velocity flow [0–0.61 m.s−1], Reynolds number [0–23,333]. The hydrodynamic parameters at the liquid/gas interface were calculated by computational fluid dynamics (CFD). In the laboratory-scale reactor, the O2 mass transfer coefficient was found to depend on the stirring rate (rph) as follows: KL,O2 = 0.016 + 0.025 N3.85. A KL,H2S/KL,O2 ratio of 0.64 ± 0.24 was found, in accordance with previously published data. CFD results helped in refining this correlation: the mass transfer coefficient depends on the local interface velocity ui (m.h−1): KL,O2 = 0.016 + 1.02 × 10−5ui3.85 In the gravity pipe device, KL,O2 also exponentially increased with the mean flow velocity. These trends were found to be consistent with the increasing level of turbulence.
Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient. Water Science and Technology 2017, 75, 1899 -1908.
AMA StyleLucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient. Water Science and Technology. 2017; 75 (8):1899-1908.
Chicago/Turabian StyleLucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2017. "Sulfide emissions in sewer networks: focus on liquid to gas mass transfer coefficient." Water Science and Technology 75, no. 8: 1899-1908.
Problems related to hydrogen sulfide may be serious for both network stakeholders and the public in terms of health, sustainability of the sewer structure and urban comfort. H2S emission models are generally theoretical and simplified in terms of environmental conditions. Although air transport characteristics in sewers must play a role in the fate of hydrogen sulfide, only a limited number of studies have investigated this issue. The aim of this study was to better understand H2S liquid to gas transfer by highlighting the link between the mass transfer coefficient and the turbulence in the air flow and the water flow. For experimental safety reasons, O2 was taken as a model compound. The oxygen mass transfer coefficients were obtained using a mass balance in plug flow. The mass transfer coefficient was not impacted by the range of the interface air-flow velocity values tested (0.55–2.28 m·s−1) or the water velocity values (0.06–0.55 m·s–1). Using the ratio between kL,O2 to kL,H2S, the H2S mass transfer behavior in a gravity pipe in the same hydraulic conditions can be predicted.
Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers. Water Science and Technology 2017, 75, 1529 -1538.
AMA StyleLucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers. Water Science and Technology. 2017; 75 (7):1529-1538.
Chicago/Turabian StyleLucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2017. "Influence of relative air/water flow velocity on oxygen mass transfer in gravity sewers." Water Science and Technology 75, no. 7: 1529-1538.
Techniques Sciences Méthode, La revue mensuelle des spécialistes de l environnement
S. Isel; J. Vazquez; M. Fischer; J. Wertel; C. Joannis; G. Lipeme Kouyi; M. Chopin; A. Labrousse; D. Scheffer; M. Thiériot; M. Dufresne. Le tarage numérique d’une relation hauteur(s)-débit : éléments de méthodologie et exemples d’application. Techniques Sciences Méthodes 2017, 41 -53.
AMA StyleS. Isel, J. Vazquez, M. Fischer, J. Wertel, C. Joannis, G. Lipeme Kouyi, M. Chopin, A. Labrousse, D. Scheffer, M. Thiériot, M. Dufresne. Le tarage numérique d’une relation hauteur(s)-débit : éléments de méthodologie et exemples d’application. Techniques Sciences Méthodes. 2017; (1-2):41-53.
Chicago/Turabian StyleS. Isel; J. Vazquez; M. Fischer; J. Wertel; C. Joannis; G. Lipeme Kouyi; M. Chopin; A. Labrousse; D. Scheffer; M. Thiériot; M. Dufresne. 2017. "Le tarage numérique d’une relation hauteur(s)-débit : éléments de méthodologie et exemples d’application." Techniques Sciences Méthodes , no. 1-2: 41-53.
This paper aims at describing two different recirculation structures observed both numerically and experimentally in the lateral branch of a dividing open channel flow with identical downstream weirs. The flow conditions leading to each identified recirculation structure are also investigated. The first recirculation pattern is a classic two-dimensional closed recirculation, typically described in the literature. The second one is a three-dimensional helix-shaped recirculation that differs from the first one notably regarding the streamline behaviour. We show that the occurrence of each structure of recirculation can be predicted by means of the Froude number and the aspect ratio in the upstream channel of the bifurcation.
Adrien Momplot; Gislain Lipeme Kouyi; Emmanuel Mignot; Nicolas Rivière; Jean-Luc Bertrand-Krajewski. Typology of the flow structures in dividing open channel flows. Journal of Hydraulic Research 2016, 55, 1 -9.
AMA StyleAdrien Momplot, Gislain Lipeme Kouyi, Emmanuel Mignot, Nicolas Rivière, Jean-Luc Bertrand-Krajewski. Typology of the flow structures in dividing open channel flows. Journal of Hydraulic Research. 2016; 55 (1):1-9.
Chicago/Turabian StyleAdrien Momplot; Gislain Lipeme Kouyi; Emmanuel Mignot; Nicolas Rivière; Jean-Luc Bertrand-Krajewski. 2016. "Typology of the flow structures in dividing open channel flows." Journal of Hydraulic Research 55, no. 1: 1-9.
12 The present paper aims to identify ways to reduce pollution injected by residents in the urban 13 wastewaters network system. Two approaches are considered. The first one uses flow and 14 pollutant calculation to test whether a polluter can easily be identified in a neighborhood. The 15 second approach uses a survey to examine what incentive would be most effective to 16 influence residents' behavior. Hydrodynamic simulation results show that concentration 17 profiles at the network outlet corresponding to all possible polluters are similar and thus do 18 not point out specific resident source of pollution. Household level survey results show that 19 most socioeconomic and public good-related characteristics do not play a significant role in 20 explaining choices to discard in the home wastewaters network. Apart from the nature of the 21 waste itself, by far, the belief that the respondent has about her neighbors' and relatives' 22 discarding behavior is the main driver of the choice. 23 24
Philippe Polome; Emmanuel Mignot; Amine Nasri; Gislain Lipeme Kouyi; Laurence Campan; Corinne Hooge; Nicolas Riviere. Urban domestic wastewater: how to reduce individual injection? 2016, 1 .
AMA StylePhilippe Polome, Emmanuel Mignot, Amine Nasri, Gislain Lipeme Kouyi, Laurence Campan, Corinne Hooge, Nicolas Riviere. Urban domestic wastewater: how to reduce individual injection? . 2016; ():1.
Chicago/Turabian StylePhilippe Polome; Emmanuel Mignot; Amine Nasri; Gislain Lipeme Kouyi; Laurence Campan; Corinne Hooge; Nicolas Riviere. 2016. "Urban domestic wastewater: how to reduce individual injection?" , no. : 1.
The problems related to hydrogen sulfide in terms of deterioration of sewer networks, toxicity and odor nuisance have become very clear to the network stakeholders and the public. The hydraulic and (bio)chemical phenomena and parameters controlling sulfide formation, emission and their incidences in sewer networks are very complex. Recent research studies have been developed in gravity and pressure sewers and some transfer models have been published. Nevertheless, the models do not take into account all the physical phenomena influencing the emission process. After summing up the main scientific knowledge concerning the production, oxidation, transfer and emission processes, the present review includes: (i) a synthetic analysis of sulfide and hydrogen sulfide emission models in sewer networks, (ii) an estimation of their limit, (iii) perspectives to improve the modelling approach. It shows that sulfide formation and uptake models still need refinements especially for some phenomena such as liquid to gas mass transfer. Transfer models that have been published so far are purposely simplified and valid for simple systems. More efforts have to be undertaken in order to better understand the mechanisms and the dynamics of hydrogen sulfide production and emission in real conditions.
Lucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. A review of sulfide emissions in sewer networks: overall approach and systemic modelling. Water Science and Technology 2015, 73, 1231 -1242.
AMA StyleLucie Carrera, Fanny Springer, Gislain Lipeme Kouyi, Pierre Buffiere. A review of sulfide emissions in sewer networks: overall approach and systemic modelling. Water Science and Technology. 2015; 73 (6):1231-1242.
Chicago/Turabian StyleLucie Carrera; Fanny Springer; Gislain Lipeme Kouyi; Pierre Buffiere. 2015. "A review of sulfide emissions in sewer networks: overall approach and systemic modelling." Water Science and Technology 73, no. 6: 1231-1242.