Suitability of CSO performance indicators for compliance with ambient water quality targets

Engelhard, C.; Toffol, S. De; Rauch, Wolfgang

doi:10.1080/15730620701736902

Cited by 17 publications

(12 citation statements)

References 11 publications

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“…Even if there are more exceedance events, if their magnitude is that much less, the impacts are likely to be that much less than fewer high volume overflows. Evaluating various ecologic impacts in receiving waters, including morphology, eutrophication, and oxygen depletion, Engelhard et al (2008) found that CSO volume was correlated well with these metrics, while CSO occurrence frequency was not.…”

Section: Existing Conditionsmentioning

confidence: 94%

See 1 more Smart Citation

Reducing combined sewer overflows by using outlet controls for Green Stormwater Infrastructure: Case study in Richmond, Virginia

Lucas¹,

Sample

2015

Journal of Hydrology

123

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Section: Existing Conditionsmentioning

confidence: 94%

“…Furthermore, when bypass occurs, the resulting CSO volumes can be considerably larger than the GSI alternatives. As previously pointed out in Engelhard et al (2008), the volume of the CSO is what impacts receiving water ecology, and thus should be minimized.…”

Section: Gray Dynamicsmentioning

confidence: 98%

Reducing combined sewer overflows by using outlet controls for Green Stormwater Infrastructure: Case study in Richmond, Virginia

Lucas¹,

Sample

2015

Journal of Hydrology

123

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“…This variable is also commonly used by legislation [8], but does not fully evaluate the environmental effects on the receiving water body [19][20][21].…”

Section: Combined Sewer Overflow Volumementioning

confidence: 99%

Coordinating Rule-Based and System-Wide Model Predictive Control Strategies to Reduce Storage Expansion of Combined Urban Drainage Systems: The Case Study of Lundtofte, Denmark

Meneses

Gaussens

Jakobsen

et al. 2018

Water

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Abstract:The environmental benefits of combining traditional infrastructure solutions for urban drainage (increasing storage volume) with real time control (RTC) strategies were investigated in the Lundofte catchment in Denmark, where an expensive traditional infrastructure expansion is planned to comply with environmental requirements. A coordinating, rule-based RTC strategy and a global, system-wide risk-based dynamic optimization strategy (model predictive control), were compared using a detailed hydrodynamic model. RTC allowed a reduction of the planned storage volume by 21% while improving the system performance in terms of combined sewer overflow (CSO) volumes, environmental impacts, and utility costs, which were reduced by up to 10%. The risk-based optimization strategy provided slightly better performance in terms of reducing CSO volumes, with evident improvements in environmental impacts and utility costs, due to its ability to prioritize among the environmental sensitivity of different recipients. A method for extrapolating annual statistics from a limited number of events over a time interval was developed and applied to estimate yearly performance, based on the simulation of 46 events over a five-year period. This study illustrates that including RTC during the planning stages reduces the infrastructural costs while offering better environmental protection, and that dynamic risk-based optimisation allows prioritising environmental impact reduction for particularly sensitive locations.

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“…Based on the local conditions, other performance indicators can also be selected. Earlier studies such as [30,31] have recommended performance indicators as assessment tools because simulation results do not adequately reflect the sewer network performance. Moreover, these indicators can also be used for describing and comparing the possible impacts of intense rainfall on the sewer system.…”

mentioning

confidence: 99%

Impact of Short Duration Intense Rainfall Events on Sanitary Sewer Network Performance

Nasrin

Sharma

Muttil

2017

Water

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Short duration intense rainfall causes an increase in rainfall derived infiltration and inflow (RDII) into aging sewer networks, which leads to Sanitary Sewer Overflows (SSOs). This study presents a generalised framework for assessing and mitigating the impacts of intense rainfall on sanitary sewer networks. The first part of the proposed framework involves a detailed hydraulic modelling to evaluate the performance of the sewer network. The second part deals with the development of SSO mitigation strategies based on Water Sensitive Urban Design (WSUD) approaches. This paper also demonstrates the application of the first part of the proposed framework for a case study catchment in Melbourne, Australia. The hydraulic performance of the case study sewer network during a wet and a dry year is presented. The analysis found that for the wet year, 11 manholes had sewer overflows, whereas 53 of 57 manholes in the network of 3.2 km had surcharges. Such a study will benefit the water authorities to develop mitigation strategies for controlling SSOs in their sewer systems.

show abstract

Suitability of CSO performance indicators for compliance with ambient water quality targets

Cited by 17 publications

References 11 publications

Reducing combined sewer overflows by using outlet controls for Green Stormwater Infrastructure: Case study in Richmond, Virginia

Reducing combined sewer overflows by using outlet controls for Green Stormwater Infrastructure: Case study in Richmond, Virginia

Coordinating Rule-Based and System-Wide Model Predictive Control Strategies to Reduce Storage Expansion of Combined Urban Drainage Systems: The Case Study of Lundtofte, Denmark

Impact of Short Duration Intense Rainfall Events on Sanitary Sewer Network Performance

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