Optimization model for water distribution network considering minimization of total replacement cost and stabilization of flow velocity in pipelines

2009 ◽  
Vol 2 (1-3) ◽  
pp. 45-51 ◽  
Author(s):  
Yasuhiro Arai ◽  
Akira Koizumi ◽  
Toyono Inakazu ◽  
Jayong Koo
Keyword(s):  
Flow Velocity ◽  
Optimization Model ◽  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Replacement Cost ◽  
Total Replacement

scholarly journals Towards Development of an Optimization Model to Identify Contamination Source in a Water Distribution Network

Water ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 579 ◽  
Author(s):  
Oluwaseye Adedoja ◽  
Yskandar Hamam ◽  
Baset Khalaf ◽  
Rotimi Sadiku
Keyword(s):  
Optimization Model ◽  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Contamination Source

Analysis of flushing-path effects in water-distribution networks

2010 ◽  
Vol 10 (5) ◽  
pp. 740-745
Author(s):  
I. H. Hyun ◽  
S. Khishigjargal ◽  
Y. W. Chang ◽  
D. H. Kim ◽  
S. Dockko
Keyword(s):  
Flow Velocity ◽  
Water Distribution ◽  
Water Pressure ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Target Area ◽  
Discharge Flow ◽  
Minimum Flow ◽  
Water Amount

The unidirectional and conventional flushing methods are compared in this study and the water amount and flow velocity at junctions within an EPANET water distribution network are compared. In the unidirectional method, the necessary flow and water pressure for the minimum flow velocity for flushing become greater when pipe diameter exceeds a certain value. Therefore, the maximum length of flushable pipeline decreases. The velocity in a pipeline is not highly dependent on the number of open hydrants; in contrast, the velocity in a pipeline after conventional flushing increases with the number of open hydrants. The hydrant discharge flow is smaller in unidirectional flushing than in conventional flushing. However, the percentage of velocities above 1.0 m/s or 1.5 m/s in a flow is relatively higher in conventional flushing when multiple hydrants are open concurrently. Moreover, preplanning or choice of an exact target area is more necessary for unidirectional flushing than for conventional flushing. In this research, a flushing path that can generate optimum effects with less hydrant discharge flow can be observed when conventional and unidirectional flushing processes are applied to specific components in advance.

EFFICIENT CHLORINATION SCHEDULE FOR A WATER DISTRIBUTION NETWORK WITH MULTIPLE PUMPING STATIONS

2017 ◽  
Vol 16 (5) ◽  
pp. 1071-1079 ◽  
Author(s):  
Andrei-Mugur Georgescu ◽  
Sanda-Carmen Georgescu ◽  
Remus Alexandru Madularea ◽  
Diana Maria Bucur ◽  
Georgiana Dunca
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Pumping Stations

A study on appropriate investment of pipeline rehabilitation for water distribution network

2005 ◽  
Vol 5 (2) ◽  
pp. 31-38
Author(s):  
A. Asakura ◽  
A. Koizumi ◽  
O. Odanagi ◽  
H. Watanabe ◽  
T. Inakazu
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Water Supply ◽  
Water Distribution ◽  
Ad Hoc ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Optimal Basis ◽  
Model Case

In Japan most of the water distribution networks were constructed during the 1960s to 1970s. Since these pipelines were used for a long period, pipeline rehabilitation is necessary to maintain water supply. Although investment for pipeline rehabilitation has to be planned in terms of cost-effectiveness, no standard method has been established because pipelines were replaced on emergency and ad hoc basis in the past. In this paper, a method to determine the maintenance of the water supply on an optimal basis with a fixed budget for a water distribution network is proposed. Firstly, a method to quantify the benefits of pipeline rehabilitation is examined. Secondly, two models using Integer Programming and Monte Carlo simulation to maximize the benefits of pipeline rehabilitation with limited budget were considered, and they are applied to a model case and a case study. Based on these studies, it is concluded that the Monte Carlo simulation model to calculate the appropriate investment for the pipeline rehabilitation planning is both convenient and practical.

Whole life costing: application to water distribution network

2003 ◽  
Vol 3 (1-2) ◽  
pp. 87-93 ◽  
Author(s):  
M. Engelhardt ◽  
D. Savic ◽  
P. Skipworth ◽  
A. Cashman ◽  
A. Saul ◽  
...  
Keyword(s):  
Network Management ◽  
Asset Management ◽  
Water Distribution ◽  
Distribution Network ◽  
Operating Cost ◽  
Water Distribution Network ◽  
Activity Based Costing ◽  
Operational Strategies ◽  
Long Term Impact ◽  
Whole Life Costing

There is an increasing pressure from the economic regulator in England and Wales for water companies to ensure that their capital maintenance decisions reflect an understanding of the long-term impact on their operational costs and risks. This implies that decisions must not only reflect the costs borne now but the likely costs in the future, and how these might be optimised. It is noteworthy that within the construction and transport industries, asset management decisions which have been driven in this direction utilise a whole life costing (WLC) methodology. This paper addresses the implications of transferring the concept of WLC to service-based assets such as water systems. A WLC approach to distribution network management aims to achieve the lowest network provision and operating cost when all costs are considered to achieve standards enforced by regulation. Cognisance is to be taken of all relevant costs - direct and indirect, private and societal - in order to balance the needs of the service supplier, the customer, society and the environment in a sustainable manner. A WLC analysis thus attempts to develop a cost profile over the life of the asset. Accounting for the costs over this period is achieved through a combination of activity based costing (ABC) and a life cycle assessment (LCA) used to identify potential social and environmental costs. This process means that each of these identified costs must be linked to some physical parameter that itself varies over time due to changing demands on the system, the different operational strategies available to the operator and natural deterioration of the fabric of the system. The links established between the cost and activities of the operator provide the basis for the development of a WLC decision tool (WiLCO) for application to water distribution network management.

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