Impact of dry weather discharges on annual pollution from a separate storm sewer in Toulouse, France

Deffontis, Stéphanie; Breton, Audrey; Vialle, Claire; Montréjaud-Vignoles, Mireille; Vignoles, Christian; Sablayrolles, Caroline

doi:10.1016/j.scitotenv.2013.03.014

Cited by 28 publications

(13 citation statements)

References 19 publications

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“…Dry weather runoff, caused by e.g., extensive irrigation or car-washing, may reflect the seasonal use and application volume of chemicals that can be mobilized in the next storm event. However, few studies investigated hyphil-TrOCs in dry weather runoff 30,44,45 and their mobilization patterns in first flush and peak flows.…”

Section: Metadata Collectionmentioning

confidence: 99%

Hydrophilic trace organic contaminants in urban stormwater: occurrence, toxicological relevance, and the need to enhance green stormwater infrastructure

Spahr

Teixidó

Sedlak

et al. 2020

Environ. Sci.: Water Res. Technol.

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Section: Metadata Collectionmentioning

confidence: 99%

Hydrophilic trace organic contaminants in urban stormwater: occurrence, toxicological relevance, and the need to enhance green stormwater infrastructure

Spahr

Teixidó

Sedlak

et al. 2020

Environ. Sci.: Water Res. Technol.

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“…Among all parameters, temperature and conductivity have been used in the past to successfully distinguish wastewater or industrial discharges from dry weather stormwater baseflow [ 10 ]. This is because domestic wastewater’s temperature is significantly higher than that of groundwater [ 19 ], and the water conductivity is highly correlated with nitrate, phosphorous, and dissolved metals which usually link to specific industrial activities such as metal plating [ 7 , 10 , 11 ]. Instead of only analysing the absolute level of water level, temperature, and EC, the general patterns or rather the rates of change are also considered as strong indicators of illicit discharges [ 20 , 21 ].…”

Section: Sensor Developmentmentioning

confidence: 99%

“…However, many researchers have emphasised that higher spatial and temporal resolution data should be collected in future via a smart water system to better understand network dynamics, to improve stormwater modelling [ 4 , 5 ], and to even support the existing stormwater infrastructure management in overcoming the challenges imposed by climate change and rapid urbanisation [ 6 ]. More urgently, illicit discharges such as cross-connection with the wastewater system, industrial discharge, and spills are considered as a major pollution source in our stormwater system [ 7 , 8 ]. However, conventional detection methods, including visual inspection, dye testing, and CCTV (closed-circuit television) cameras are not necessarily efficient and effective enough to locate and eliminate most point discharge sources in an urban catchment [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost Water Depth and Electrical Conductivity Sensor for Detecting Inputs into Urban Stormwater Networks

Shi

Catsamas

Kolotelo

et al. 2021

Sensors

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High-resolution data collection of the urban stormwater network is crucial for future asset management and illicit discharge detection, but often too expensive as sensors and ongoing frequent maintenance works are not affordable. We developed an integrated water depth, electrical conductivity (EC), and temperature sensor that is inexpensive (USD 25), low power, and easily implemented in urban drainage networks. Our low-cost sensor reliably measures the rate-of-change of water level without any re-calibration by comparing with industry-standard instruments such as HACH and HORIBA’s probes. To overcome the observed drift of level sensors, we developed an automated re-calibration approach, which significantly improved its accuracy. For applications like monitoring stormwater drains, such an approach will make higher-resolution sensing feasible from the budget control considerations, since the regular sensor re-calibration will no longer be required. For other applications like monitoring wetlands or wastewater networks, a manual re-calibration every two weeks is required to limit the sensor’s inaccuracies to ±10 mm. Apart from only being used as a calibrator for the level sensor, the conductivity sensor in this study adequately monitored EC between 0 and 10 mS/cm with a 17% relative uncertainty, which is sufficient for stormwater monitoring, especially for real-time detection of poor stormwater quality inputs. Overall, our proposed sensor can be rapidly and densely deployed in the urban drainage network for revolutionised high-density monitoring that cannot be achieved before with high-end loggers and sensors.

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“…The fate of the pollutants listed in Table 3 and their concentrations and spatial distribution in the environment are influenced by a combination of numerous different factors, such as the type of surface and the type of used material (soil, painting, coating, etc. ), the characteristics of the precipitation and its seasonal variation, the end-of-pipe collection together with treatment facilities, and the physical-chemical properties of the compound [113][114][115][116][117]. Precipitation can be considered a crucial factor for the release of target compounds from green infrastructure into the aquatic environment.…”

Section: Pollutants' Environmental Fatementioning

confidence: 99%

Impact of Green Roofs and Vertical Greenery Systems on Surface Runoff Quality

Hachoumi

Pucher

Vito-Francesco

et al. 2021

Water

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Green roofs (GRs) and vertical greenery systems (VGSs) can contribute certain pollutants to stormwater runoff, affecting the quality of the receiving waters. The objective of this review paper is to discuss the potential impact of these systems on the quality of urban runoff. In the green building systems section, a series of materials used in greenery systems and their specific application are presented and environmentally relevant substances that could be leached out from these materials are identified as potential pollutants. After the identification of environmentally relevant pollutants that have already been measured in urban runoff and originate from these systems, an assessment of their pathways, fate, and impact in the aquatic environment is performed. Since GRs and VGSs are already considered to be solutions for stormwater quantity and quality management in urban areas, recommendations for mitigating their environmental impact through runoff are needed. It can be concluded that special focus should be placed on measures that target the pollution source, such as optimizing GR and VGS construction practices and materials used, as well as establishing appropriate decentralized stormwater treatment measures. Both of these approaches will help to reduce or even entirely avoid the emission of relevant pollutants into the aquatic environment.

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Impact of dry weather discharges on annual pollution from a separate storm sewer in Toulouse, France

Abstract: OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 9850To link to this article :

Cited by 28 publications

References 19 publications

Hydrophilic trace organic contaminants in urban stormwater: occurrence, toxicological relevance, and the need to enhance green stormwater infrastructure

Hydrophilic trace organic contaminants in urban stormwater: occurrence, toxicological relevance, and the need to enhance green stormwater infrastructure

A Low-Cost Water Depth and Electrical Conductivity Sensor for Detecting Inputs into Urban Stormwater Networks

Impact of Green Roofs and Vertical Greenery Systems on Surface Runoff Quality

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