Integrated stormwater inflow control for sewers and green structures in urban landscapes

Lund, Nadia Schou Vorndran; Borup, Morten; Madsen, Henrik; Mark, Ole; Arnbjerg‐Nielsen, Karsten; Mikkelsen, Peter Steen

doi:10.1038/s41893-019-0392-1

Cited by 59 publications

(36 citation statements)

References 52 publications

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“…The second principle, Cities Providing Ecosystem Services, espouses integrating urban landscape design with sustainable urban water management. 20,34,35 This integration incorporates…”

Section: Applying the Principles Of Water-sensitive Practicementioning

confidence: 99%

“…This mode of thinking promotes innovative design ideas, such as new urban form configurations, technological interventions, community engagement campaigns, and governance arrangements. 35,59 Collaborative Thinking Central to each of the above modes of thinking is a commitment to collaboration: ambitious sustainability objectives cannot be achieved through siloed, single-objective planning, design, and management processes. The CRC for Water-Sensitive Cities' landmark transition strategy development process aims to establish long-term collaborative partnerships that drive transformative action among local stakeholders.…”

Section: Systems Thinkingmentioning

confidence: 99%

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Transforming Cities through Water-Sensitive Principles and Practices

2020

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Many global cities and towns are facing complex and interrelated challenges associated with population growth, resource constraints, aging infrastructure, and degraded environments, exacerbated by increasing climate uncertainty. The United Nation's Agenda 2030 is a global call to action with 17 Sustainable Development Goals (SDGs). Water is the common currency linking nearly every SDG. SDG 11 aspires to ''Make cities and human settlements inclusive, safe, resilient, and sustainable'' and the water-sensitive city represents an aspirational future state for water management where servicing strategies deliver long-term sustainability, liveability, resilience, and prosperity. This social-technical endeavor is based on three principles of practice proposed in 2009. They have since been operationalized and adapted in many projects globally, and across a range of social, institutional, and biophysical contexts. In this Perspective, we reflect on lessons learned, required actions for mainstreaming water-sensitive practices, the next-wave research agenda, and opportunities to catalyze actions in sectors beyond water. ll

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“…The second principle, Cities Providing Ecosystem Services, espouses integrating urban landscape design with sustainable urban water management. 20,34,35 This integration incorporates…”

Section: Applying the Principles Of Water-sensitive Practicementioning

confidence: 99%

Section: Systems Thinkingmentioning

confidence: 99%

Transforming Cities through Water-Sensitive Principles and Practices

2020

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“…In addition to increasing water supply security, household rainwater tanks have a number of other benefits, such as improving the water quality of receiving waters [13,14] and reducing peak flows for short-duration storm events [15][16][17][18][19]. The ability of household rainwater tanks to reduce peak flows is of particular interest, as not only water supply systems, but also stormwater systems, are likely to be adversely affected by increased urbanization and climate change.…”

Section: Introductionmentioning

confidence: 99%

Real-Time, Smart Rainwater Storage Systems: Potential Solution to Mitigate Urban Flooding

Liang

Matteo

Maier

et al. 2019

Water

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Urban water systems are being stressed due to the effects of urbanization and climate change. Although household rainwater tanks are primarily used for water supply purposes, they also have the potential to provide flood benefits. However, this potential is limited for critical storms, as they become ineffective once their capacity is exceeded. This limitation can be overcome by controlling tanks as systems during rainfall events, as this can offset the timing of outflow peaks from different tanks. In this paper, the effectiveness of such systems is tested for two tank sizes under a wide range of design rainfall conditions for three Australian cities with different climates. Results show that a generic relationship exists between the ratio of tank:runoff volume and percentage peak flow reduction, irrespective of location and storm characteristics. Smart tank systems are able to reduce peak system outflows by between 35% and 85% for corresponding ranges in tank:runoff volumes of 0.15–0.8. This corresponds to a relative performance improvement on the order of 35% to 50% compared with smart tanks that are not operated in real-time. These results highlight the potential for using household rainwater tanks for mitigating urban flooding, even for extreme events.

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“…However, the cloudburst infrastructure is designed to safely convey and store stormwater during much larger extreme rain events and will thus also be safe to use during minor and medium‐sized rain events. Other general nuisances from keeping stormwater on the surface may potentially be integrated into the control optimization (Lund, Borup, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The general perspective of this real‐time dynamic control is introduced as “integrated stormwater inflow control” in Lund, Borup, et al (2019). The present paper applies the concept on a simulated proof‐of‐concept study for a real catchment in Copenhagen containing a local cloudburst project with existing aboveground storage and conveyance properties.…”

Section: Introductionmentioning

confidence: 99%

CSO Reduction by Integrated Model Predictive Control of Stormwater Inflows: A Simulated Proof of Concept Using Linear Surrogate Models

Lund

Borup

Madsen

et al. 2020

Water Resources Research

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Combined sewer overflows (CSO) of mixed stormwater and wastewater pollute nearby receiving surface waters and pose a risk to the environment and human health. We use “integrated stormwater inflow control” to mitigate CSO by dynamically controlling the inflow of stormwater to the combined sewer system in real time, expanding the physical space of traditional real‐time control. This control is carried out with model predictive control (MPC), which we base on convex optimization including a linear internal surrogate model of the controllable aboveground and belowground infrastructure. A detailed hydrodynamic model is used to evaluate the results and recursively initialize the surrogate model. MPC dynamically decides when to let stormwater enter the sewer system and when to store and convey excess stormwater in the aboveground infrastructure otherwise intended for passive cloudburst management. The performance was quantified in a simulation study in Copenhagen, Denmark, using a 1‐D distributed hydrodynamic model and 32 rain events from 2016, of which 18 caused CSO in the situation without control. Four of the 18 CSO events were avoided with MPC, and the total CSO volume was reduced by 98.4% of the potential reducible volume. For one event, stormwater was unnecessarily kept on the surface because the surrogate model wrongly predicted a CSO. The computational cost was in all cases compatible with an operational implementation. With the invention of proper actuators for control of stormwater inflows, we show that MPC of stormwater inflows may be a viable supplement to more traditional passive ways of managing stormwater in urban areas.

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Integrated stormwater inflow control for sewers and green structures in urban landscapes

Cited by 59 publications

References 52 publications

Transforming Cities through Water-Sensitive Principles and Practices

Transforming Cities through Water-Sensitive Principles and Practices

Real-Time, Smart Rainwater Storage Systems: Potential Solution to Mitigate Urban Flooding

CSO Reduction by Integrated Model Predictive Control of Stormwater Inflows: A Simulated Proof of Concept Using Linear Surrogate Models

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