scholarly journals Advances in Modeling and Management of Urban Water Networks

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2956
Author(s):  
Alberto Campisano ◽  
Enrico Creaco
Keyword(s):  
Asset Management ◽  
Distribution Systems ◽  
Water Distribution ◽  
Urban Water ◽  
Multi Objective Optimization ◽  
Water Networks ◽  
Special Issue ◽  
Leakage Reduction ◽  
Multi Objective ◽  
Pipe Burst

This Editorial presents a representative collection of 15 papers, presented in the Special Issue on Advances in Modeling and Management of Urban Water Networks (UWNs), and frames them in the current research trends. The most analyzed systems in the Special Issue are the Water Distribution Systems (WDSs), with the following four topics explored: asset management, modelling of demand and hydraulics, energy recovery, and pipe burst identification and leakage reduction. In the first topic, the multi-objective optimization of interventions on the network is presented to find trade-off solutions between costs and efficiency. In the second topic, methodologies are presented to simulate and predict demand and to simulate network behavior in emergency scenarios. In the third topic, a methodology is presented for the multi-objective optimization of pump-as-turbine (PAT) installation sites in transmission mains. In the fourth topic, methodologies for pipe burst identification and leakage reduction are presented. As for the Urban Drainage Systems (UDSs), the two explored topics are asset management, with a system upgrade to reduce flooding, and modelling of flow and water quality, with analyses on the transition from surface to pressurized flow, impact of water use reduction on the operation of UDSs and sediment transport in pressurized pipes. The Special Issue also includes one paper dealing with the hydraulic modelling of an urban river with a complex cross-section.

scholarly journals Self-Adaptive Models for Water Distribution System Design Using Single-/Multi-Objective Optimization Approaches

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1293 ◽  
Author(s):  
Choi ◽  
Kim
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Mathematical Problem ◽  
Benchmark Problems ◽  
Future Research ◽  
Multi Objective Optimization ◽  
Adaptive Approach ◽  
Multi Objective ◽  
Self Adaptive

This study compares the performance of self-adaptive optimization approaches in efficient water distribution systems (WDS) design and presents a guide for the selection of the appropriate method employing optimization utilizing the characteristic of each technique formulation. To this end, this study performs three types of analyses. First, the sensitivity analysis of each self-adaptive approach is conducted on single/multi-objective mathematical benchmark problems with various problem types (e.g., using solution shape or many local optimal solutions). Second, based on the applications and results of the mathematical problem, the performance of the algorithm is verified in the WDS design problem considering the minimum cost and the maximum system resilience under the single/multi-objective optimization framework. Third, the characteristics of search operators in the self-adaptive approach are compared according to the presence or absence of additional parameters and operators. Moreover, various performance indices are employed to compare the quantitative evaluation of each algorithm. Each algorithm is found to exhibit different characteristics depending on the problem scale and solution type. These results are expected to benefit future research in the formulation of new approaches and developments. Hence, this study provides rigorous testing of the performance of newly proposed algorithms in a highly simplified manner.

scholarly journals Water Networks Management: New Perspectives

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 239 ◽  
Author(s):  
Vasilis Kanakoudis ◽  
Stavroula Tsitsifli
Keyword(s):  
Water Resources ◽  
Sustainable Management ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Supply Systems ◽  
Water Networks ◽  
Special Issue ◽  
Water Losses ◽  
Water Volumes ◽  
Supply Systems

Real water losses in water distribution systems may well be considered a potential water resource, as the significant water volumes being wasted through these physical losses should be replaced eventually. Advanced tools and strategies can be used for the efficient and sustainable management of water resources toward circular economy. The present Special Issue presents new perspectives for water networks management. The 10 peer-reviewed papers collected in this Special Issue have been grouped in two categories—drinking water supply systems and water resources and irrigation systems. These papers are being briefly presented in this Editorial.

Operational Costs Optimization in Water Distribution Systems

2014 ◽  
Author(s):  
Dhafar Al-Ani ◽  
HamedHossien Afshari ◽  
Saeid Habibi
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Optimization Problems ◽  
Water Distribution Systems ◽  
Cost Savings ◽  
Search Space ◽  
Optimal Solutions ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Objective Space

Pump management and reservoir management have many similarities, and therefore, should ideally be analyzed in an integrated way to plan effectively the daily operation of water distribution systems. Historically, these two management activities have been evolved as separate tasks in energy-efficiency (i.e., energy optimization) studies and are often carried out in an isolated way. The latter being most often associated directly with the concepts of multimodal and multi-objective optimization problems, whereas the former is usually considered as a single optimization problem to be solved. When some single optimization problems appear at part of the solution tied to a local (i.e., regional) search-space (i.e., objective space), this artificial integration (i.e., multi-modal and multi-objective optimization) can always obtain optimal solutions. Similarly when system constraints and load conditions are considered, a set of feasible and innovative optimal solutions can be obtained in order to continue the enhancement of energy consumption that turns into a significant reduction in the overall operational cost (i.e., a potential of 6.24% cost savings) without affecting the level of services provided to the clients in a safe and protected manner.

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