AN OPTIMIZATION METHOD OF SERVICE RESERVOIR OPERATIONS FOR A WATER DISTRIBUTION SYSTEM BASED ON ANALYSES OF OPERATION RECORDS

2019 ◽  
Vol 75 (6) ◽  
pp. II_197-II_208
Author(s):  
Shingo ADACHI ◽  
Yasuhiro ARAI ◽  
Akira KOIZUMI ◽  
Shinsuke TAKAHASHI ◽  
Takeshi TAKEMOTO
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Optimization Method ◽  
Reservoir Operations

scholarly journals Seismic Resilience Enhancement of Urban Water Distribution System Using Restoration Priority of Pipeline Damages

2020 ◽  
Vol 12 (3) ◽  
pp. 914
Author(s):  
Zhao Han ◽  
Donghui Ma ◽  
Benwei Hou ◽  
Wei Wang
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Discrete Event ◽  
Cost Benefit ◽  
Optimization Method ◽  
Relative Difference ◽  
Evaluation Framework ◽  
System State ◽  
Seismic Resilience

The malfunction of the water distribution system (WDS) following severe earthquakes have significant impacts on the post-earthquake rescue. Moreover, the restoration priority of earthquake-induced pipeline damages plays an important role in improving the post-earthquake serviceability of WDS and the “seismic resilience”. Thus, to enhance the seismic resilience of WDS, this study develops a dynamic cost-benefit method and introduces three existing methods to determine the restoration priority of pipeline damages based on a quantitative resilience evaluation framework. In this resilience evaluation framework, the restoration priority is firstly determined. Then the time-varying performance of post-earthquake WDS is modeled as a discrete event dynamic system. In this model, the system state changes after the reparation of pipeline damage, and the system performance is simulated by a hydraulic model to be consistent with the system state. In this study, this method is also tested and compared with other existing methods, and the results show that the system resilience corresponding to the restoration priority obtained by this method is close to that obtained by the global optimization method with a relative difference of less than 3%, whereas the calculation complexity is about 0.4% of the optimization model. It is concluded that this proposed method is valid.

Study on Measures for Solving Accident of Water Distribution System

2014 ◽  
Vol 918 ◽  
pp. 149-153
Author(s):  
Wei Zhuo Wang ◽  
Jian Min Bian
Keyword(s):  
Mathematical Modeling ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Optimization Method ◽  
Pipe Network ◽  
Hypothetical Case ◽  
Modeling And Optimization ◽  
Main Factors

Measures for solving accident of water distribution system are main factors on urban pipe network developing. This research is done by mathematical modeling and optimization based on EPANET. The potential scheme have been proposed at the very beginning of the accident; then, the best result is chosen by calculating. The method is tested by solving a hypothetical case. The result shows the superiority of the optimization method in view of economic and reliability point, convergence and calculation efficiency in the calculation.

Assessment of Lisbon drinking water distribution network biofilm colonization and associated hazards

2008 ◽  
Vol 8 (4) ◽  
pp. 421-426
Author(s):  
J. Menaia ◽  
M. Benoliel ◽  
A. Lopes ◽  
C. Neto ◽  
E. Ferreira ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Water Distribution Network ◽  
Storage Tanks ◽  
Water Pipe ◽  
Cultural Methods ◽  
Drinking Water Distribution ◽  
And Storage

Concerns arise from the possible occurrence of pathogens in drinking water pipe biofilms and storage tank sediments. In these studies, biofilm samples from pipes and sediments from storage tanks of the Lisbon drinking water distribution system were analyzed. Protein determinations and heterotrophic counts on pipe biofilm samples were used to assess the Lisbon network sessile colonization intensity and distribution. Indicator and pathogenic microorganisms were analyzed in pipe biofilm samples, as well as in storage tanks biofilm and sediments, by using cultural methods and PCR, to assess risks. Results have shown that the Lisbon network sessile colonization is relatively weak in intensity. In addition, no meaningful hazards were apparent for both the network biofilm and the storage tanks biofilm and sediments.

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