Cost-efficiency of RTC for CSO impact mitigation

Dirckx, Geert; Schütze, Manfred; Kröll, Stefan; Thoeye, C.; Gueldre, G. De; Steene, B. Van De

doi:10.1080/1573062x.2011.630092

Cited by 43 publications

(34 citation statements)

References 7 publications

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“…This "equal filling degree" strategy is widely applied (see among others Borsanyi et al 2008 andDirckx et al 2011), but it does not account for different basin sensitivities. It was included in (c) this study by minimising the weighted difference in filling degree Δθ*, which was defined as: (e) DORA: the proposed control strategy was applied by including runoff forecasts in the optimisation of the system.…”

Section: Comparison Of Rtc Approachesmentioning

confidence: 99%

“…For example, Dirckx et al (2011) compared the cost and performance of RTC against other structural solutions (detention basins, disconnection of impervious areas, enlargement of pipes, etc.). Furthermore, RTC should be seen as a tool that integrates with structural solutions rather than act as an alternative thereto, thus decreasing the total investment that controlling the system in real time.…”

Section: Introductionmentioning

confidence: 99%

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A generalised Dynamic Overflow Risk Assessment (DORA) for Real Time Control of urban drainage systems

Vezzaro

Grum

2014

Journal of Hydrology

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An innovative and generalised approach to the integrated real time control of urban drainage systems is presented. The Dynamic Overflow Risk Assessment (DORA) strategy aims to minimise the expected Combined Sewer Overflow (CSO) risk by considering (i) the water volume presently stored in the drainage network, (ii) the expected runoff volume (calculated by radar-based nowcast models) and -most important -(iii) the estimated uncertainty of the runoff forecasts. The inclusion of uncertainty allows for a more confident use of Real Time Control (RTC). Overflow risk is calculated by a flexible function which allows for the prioritisation of the discharge points according to their sensitivity and intended use. DORA was tested on a hypothetical example inspired by the main catchment in the city of Aarhus (Denmark). An analysis of DORA's performance over a range of events with different return periods, using a simple conceptual model, is presented. Compared to a traditional local control approach, DORA contributed to reduce CSO volumes from the most sensitive points while reducing total CSO volumes discharged from the catchment. Additionally, the results show that the inclusion of forecasts and their uncertainty contributed to further improving the performance of drainage systems. The results of this paper will contribute to the wider usage of global RTC methods in the management of urban drainage networks.

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Section: Comparison Of Rtc Approachesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A generalised Dynamic Overflow Risk Assessment (DORA) for Real Time Control of urban drainage systems

Vezzaro

Grum

2014

Journal of Hydrology

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“…The materials and construction costs for all scenarios presented in this study were estimated according to Dirckx et al [13]. Other costs, such as subscription to rainfall forecast services, operation and maintenance (O & M), and troubleshooting services, were estimated based on the METSAM project in Copenhagen [22].…”

Section: Utility Costsmentioning

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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“…However, there are few studies about the benefits of WSUD for reducing sewer overflows as these strategies are commonly used for stormwater management. Common approaches of SSO mitigation focus largely on structural actions and are well documented in literature [20][21][22][23]. Hence, the framework presented in this study includes a detailed modelling of WSUD approaches for reducing rainfall induced sewer overflows.…”

Section: Introductionmentioning

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.

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Cost-efficiency of RTC for CSO impact mitigation

Cited by 43 publications

References 7 publications

A generalised Dynamic Overflow Risk Assessment (DORA) for Real Time Control of urban drainage systems

A generalised Dynamic Overflow Risk Assessment (DORA) for Real Time Control of urban drainage systems

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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