Impacts of Combined Sewer Overflows on surface water bodies. The case study of the Ebro River in Zaragoza city

2019 ◽  
Vol 226 ◽  
pp. 1-5 ◽  
Author(s):  
Lucía Soriano ◽  
José Rubió
Keyword(s):  
Surface Water ◽  
Water Bodies ◽  
Combined Sewer Overflows ◽  
Ebro River ◽  
Combined Sewer ◽  
Surface Water Bodies ◽  
Sewer Overflows

Continuous monitoring in sewer networks an approach for quantification of pollution loads from CSOs into surface water bodies

2005 ◽  
Vol 52 (12) ◽  
pp. 215-223 ◽  
Author(s):  
G. Gruber ◽  
S. Winkler ◽  
A. Pressl
Keyword(s):  
Surface Water ◽  
Continuous Monitoring ◽  
Water Bodies ◽  
Sensor Calibration ◽  
Sampling Errors ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Surface Water Bodies ◽  
Sewer Networks ◽  
Pollution Loads

Different approaches for quantification of pollution loads discharged from combined sewer networks into surface water bodies have been observed over the last few years and decades, but a large number of unresolved problems still remain. Many monitoring campaigns have been based on manual or automated spot sampling – with the long known limitations of this method such as sampling errors and errors due to sample conservation, transport and preparation. On the other hand, only recently have sensors became available which are suitable for continuous application in sewer networks. A large number of practical problems still have to be solved before continuous monitoring in sewer networks will be successful. Additionally, most of the applicable sensors are based on surrogate methods which results in a considerable effort for reference measurements for sensor calibration. Finally, it has to be considered that, depending on the sewer network topography, deposition and remobilisation of pollutants varies considerably, which limits the generality of monitoring results and, subsequently, their applicability as a base for the design of storm water tanks or combined sewer overflows (CSO). A monitoring station for continuous monitoring of load discharges from a CSO has been installed and operated for more than one year. The design and equipment of the measurement station, operational experiences and results are given in this paper.

Nitrogen patterns in subsurface waters of the Yzeron stream: effect of combined sewer overflows and subsurface–surface water mixing

2013 ◽  
Vol 68 (12) ◽  
pp. 2632-2637 ◽  
Author(s):  
A. M. Aucour ◽  
T. Bariac ◽  
P. Breil ◽  
P. Namour ◽  
L. Schmitt ◽  
...  
Keyword(s):  
Surface Water ◽  
Cold Season ◽  
Low Flow ◽  
Subsurface Water ◽  
Urban Stream ◽  
Nitrogen Forms ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Subsurface Waters ◽  
Sewer Overflows

Urbanization subjects streams to increased nitrogen loads. Therefore studying nitrogen forms at the interface between urban stream and groundwater is important for water resource management. In this study we report results on water δ18O and nitrogen forms in subsurface waters of a stream (Yzeron, France). The sites studied were located upstream and downstream of combined sewer overflows (CSO) in a rural area and a periurban area, respectively. Water δ18O allowed us to follow the mixing of subsurface water with surface water. Dissolved organic nitrogen and organic carbon of fine sediment increased by 20–30% between rural and periurban subsurface waters in the cold season, under high flow. The highest nitrate levels were observed in rural subsurface waters in the cold season. The lowest nitrate levels were found in periurban subsurface waters in the warm season, under low flow. They corresponded to slow exchange of subsurface waters with channel water. Thus reduced exchange between surface and subsurface waters and organic-matter-rich input seemed to favor nitrate reduction in the downstream, periurban, subsurface waters impacted by CSO.

XAI tools in the public sector: a case study on predicting combined sewer overflows

2021 ◽  
Author(s):  
Nicholas Maltbie ◽  
Nan Niu ◽  
Matthew Van Doren ◽  
Reese Johnson
Keyword(s):  
Public Sector ◽  
Combined Sewer Overflows ◽  
The Public ◽  
Combined Sewer ◽  
Sewer Overflows

scholarly journals Modeling of <i>E. coli</i> distribution for hazard assessment of bathing waters affected by combined sewer overflows

2020 ◽  
Vol 20 (5) ◽  
pp. 1219-1232 ◽  
Author(s):  
Luca Locatelli ◽  
Beniamino Russo ◽  
Alejandro Acero Oliete ◽  
Juan Carlos Sánchez Catalán ◽  
Eduardo Martínez-Gomariz ◽  
...  
Keyword(s):  
Water Quality ◽  
Hazard Assessment ◽  
Health Hazard ◽  
Water Bodies ◽  
Combined Sewer Overflows ◽  
Bathing Water ◽  
Bathing Waters ◽  
Combined Sewer ◽  
Bathing Water Quality

Abstract. Combined sewer overflows (CSOs) affect bathing water quality of receiving water bodies by bacterial pollution. The aim of this study is to assess the health hazard of bathing waters affected by CSOs. This is useful for bathing water managers, for risk assessment purposes, and for further impact and economic assessments. Pollutant hazard was evaluated based on two novel indicators proposed in this study: the mean duration of insufficient bathing water quality (1) over a period of time (i.e., several years) and (2) after single CSO/rain events. In particular, a novel correlation between the duration of seawater pollution and the event rainfall volume was developed. Pollutant hazard was assessed through a coupled urban drainage and seawater quality model that was developed, calibrated and validated based on local observations. Furthermore, hazard assessment was based on a novel statistical analysis of continuous simulations over a 9-year period using the coupled model. Finally, a validation of the estimated hazard is also shown. The health hazard was evaluated for the case study of Badalona (Spain) even though the methodology presented can be considered generally applicable to other urban areas and related receiving bathing water bodies. The case study presented is part of the EU-funded H2020 project BINGO (Bringing INnovation to OnGOing water management – a better future under climate change).

Emission-immission based design of combined sewer overflows and treatment plant - the dresden case study

1997 ◽  
Vol 36 (8-9) ◽  
pp. 355-359
Author(s):  
L. Fuchs ◽  
D. Gerighausen ◽  
S. Schneider
Keyword(s):  
Treatment Plant ◽  
Combined Sewer Overflows ◽  
Quality Model ◽  
Combined Sewer ◽  
Receiving Waters ◽  
Sewer Overflows ◽  
Set Up ◽  
The City

For the city of Dresden a general master plan was set up based on investigations of the hydraulic capacity of the sewer system, the loads from combined sewer overflow and the treatment plant. The total emission from combined sewer overflows and treatment plant was the main criteria for the analysis of the efficiency of different renovation alternatives. The effect of the different alternatives on the quality of the receiving waters was investigated with a water quality model and evaluated with different approaches.

scholarly journals Short communication: Quantitative spatial analysis of randomly situated surface water bodies through f-αspectra

2001 ◽  
Vol 6 (3) ◽  
pp. 213-217 ◽  
Author(s):  
B. S. Daya Sagar
Keyword(s):  
Spatial Distribution ◽  
Surface Water ◽  
Short Communication ◽  
Probability Distributions ◽  
Water Bodies ◽  
Spatial Organisation ◽  
Data Set ◽  
Surface Water Bodies ◽  
Quantitative Spatial Analysis

A notable similarity is observed between the probability distributions obtained from a data set that contains a large number of randomly situated surface water bodies and the probability distributions estimated by binomial multiplicative process. From these well conformed probability distributions, the generalised information dimensions have been computed through f-αspectra to characterise and quantify the spatial organisation of the surface water bodies. It is noticed from the investigated case study that the results tend to vary by changing the direction of bisecting process. The experimental results on spatial distribution of surface water bodies of the study area qualify that the computed generalised information dimensions for the vertical bisecting is rather uniform than that of the horizontal bisecting process.

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