Long-term versus Real-time Optimal Operation for Gate Regulation during Flood in Urban Drainage Systems

Flooding is a phenomenon that endangers human being life and property. There are many structural and non-structural options that can be considered in order to reduce destructive effects of flooding. In this study, we propose a new methodology to enhance the performance of a real-time optimal operation model for flood mitigation in urban drainage systems. An online real-time model is developed as a simulation-optimization approach that leads to optimal operational policies based on the real-time rainfall information. Rainfall-runoff processes and hydraulic routing in the pipes are simulated by the EPA stormwater management model (SWMM) which is linked to the particle swarm optimization (PSO) algorithm, evaluating the system operation performance for assorted sets of operating policies. The initial solution in the real-time model is obtained by a long-term optimal operation model based on historical past flood events. The approach is validated by applying it to a portion of the urban drainage system in Tehran, the capital of Iran, consisting of a prototype network of pipes and detention reservoir equipped with controllable gates. Results show that the proposed strategy in introducing a reasonable initial solution to the real-time model can successfully enhance the performance of the model.

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Using ensemble weather forecast in a risk based real time optimization of urban drainage systems

La Houille Blanche ◽

10.1051/lhb/20150025 ◽

2015 ◽

pp. 101-107 ◽

Cited By ~ 4

Author(s):

Vianney Courdent ◽

Luca Vezzaro ◽

Peter Steen Mikkelsen ◽

Ane Loft Mollerup ◽

Morten Grum

Keyword(s):

Real Time ◽

Weather Forecast ◽

Urban Drainage ◽

Drainage Systems ◽

Time Optimization ◽

Urban Drainage Systems ◽

Real Time Optimization

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Investigating the Role of Gate Operation in Real-Time Flood Control of Urban Drainage Systems

Harmony Search and Nature Inspired Optimization Algorithms - Advances in Intelligent Systems and Computing ◽

10.1007/978-981-13-0761-4_4 ◽

2018 ◽

pp. 39-48

Author(s):

Fatemeh Jafari ◽

S. Jamshid Mousavi ◽

Jafar Yazdi ◽

Joong Hoon Kim

Keyword(s):

Real Time ◽

Flood Control ◽

Urban Drainage ◽

Gate Operation ◽

Drainage Systems ◽

Urban Drainage Systems

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Combined Application of Real-Time Control and Green Technologies to Urban Drainage Systems

Water ◽

10.3390/w12123432 ◽

2020 ◽

Vol 12 (12) ◽

pp. 3432

Author(s):

Margherita Altobelli ◽

Sara Simona Cipolla ◽

Marco Maglionico

Keyword(s):

Real Time ◽

Water Bodies ◽

Water Volume ◽

Urban Drainage ◽

Real Time Control ◽

Green Technologies ◽

Drainage Systems ◽

Combined Application ◽

Time Control ◽

Urban Drainage Systems

The increase in waterproof surfaces, a typical phenomenon of urbanization, on the one hand, reduces the volume of rainwater that naturally infiltrates the subsoil and, on the other, it determines the increase in speeds, flow rates, and outflow volume surface; at the same time, it causes a qualitative deterioration of the water. This study researched the optimal management of urban drainage systems via the combined application of real-time control and green technologies. A hydraulic model of the sewer system of the suburbs of Bologna (Italy) was set up using the Environmental Protection Agency (EPA) Storm Water Management Model (SWMM) to evaluate the reduction in water volume and the masses of pollutants discharged in water bodies. The combined application of these technologies allows significantly reducing both the pollutants released into the receiving water bodies and the overflow volumes, while optimizing the operation of the treatment plants. Green technologies cause an average reduction equal to 45% in volume and 53% of total suspended solids (TSS) sent to the receiver. The modeled cases represent only some of the possible configurations achievable on urban drainage systems; the combined use of different solutions could lead to further improvements in the overall functioning of the drainage system.

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The effects of non-stationarity on the evaluation of critical design storms

Water Science & Technology ◽

10.2166/wst.1998.0465 ◽

1998 ◽

Vol 37 (11) ◽

pp. 187-193 ◽

Cited By ~ 4

Author(s):

C. De Michele ◽

A. Montanari ◽

R. Rosso

Keyword(s):

Daily Rainfall ◽

Extreme Value Distribution ◽

Flood Management ◽

Extreme Value ◽

Urban Drainage ◽

Drainage Systems ◽

Design Storm ◽

Critical Design ◽

Urban Drainage Systems

The critical storm is generally carried out to design urban drainage systems and other flood management works starting from the available historical information. Its evaluation associated with a fixed return period is usually obtained by fitting the annual maxima of the rainfall depth with an extreme value distribution. This statistical procedure, however, leads to dubious results when the data present a non-stationarity, induced for example, by a long-term variability. To assess the effects of non-stationarity, four daily rainfall series observed in Italy, with at least 90 years of continuous data, are analysed here. For each record and each year of the observation period, critical design storms are estimated fitting the annual maxima collected in the past, so allowing us to assess the progress of the design storm along time. Four different extreme value distributions are used. The results show that an analysis of non-stationarity is required when urban drainage systems and other hydraulic engineering works are designed.

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Water Quality-based Real Time Control of Integrated Urban Drainage Systems: A Preliminary Study from Copenhagen, Denmark

Procedia Engineering ◽

10.1016/j.proeng.2014.02.188 ◽

2014 ◽

Vol 70 ◽

pp. 1707-1716 ◽

Cited By ~ 22

Author(s):

L. Vezzaro ◽

M.L. Christensen ◽

C. Thirsing ◽

M. Grum ◽

P.S. Mikkelsen

Keyword(s):

Water Quality ◽

Real Time ◽

Urban Drainage ◽

Real Time Control ◽

Drainage Systems ◽

Time Control ◽

Urban Drainage Systems ◽

Preliminary Study

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Parallel computing in conceptual sewer simulations

Water Science & Technology ◽

10.2166/wst.2010.798 ◽

2010 ◽

Vol 61 (2) ◽

pp. 283-291 ◽

Cited By ~ 5

Author(s):

G. Burger ◽

S. Fach ◽

H. Kinzel ◽

W. Rauch

Keyword(s):

Parallel Computing ◽

Software Tool ◽

Computational Time ◽

Limiting Factor ◽

Urban Drainage ◽

Pollution Effects ◽

Drainage Systems ◽

Sewer Systems ◽

Urban Drainage Systems

Integrated urban drainage modelling is used to analyze how existing urban drainage systems respond to particular conditions. Based on these integrated models, researchers and engineers are able to e.g. estimate long-term pollution effects, optimize the behaviour of a system by comparing impacts of different measures on the desired target value or get new insights on systems interactions. Although the use of simplified conceptual models reduces the computational time significantly, searching the enormous vector space that is given by comparing different measures or that the input parameters span, leads to the fact, that computational time is still a limiting factor. Owing to the stagnation of single thread performance in computers and the rising number of cores one needs to adapt algorithms to the parallel nature of the new CPUs to fully utilize the available computing power. In this work a new developed software tool named CD3 for parallel computing in integrated urban drainage systems is introduced. From three investigated parallel strategies two showed promising results and one results in a speedup of up to 4.2 on an eight-way hyperthreaded quad core CPU and shows even for all investigated sewer systems significant run-time reductions.

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