Optimization of the Regional Municipality of Ottawa-Carleton's water supply system operations. II. Model results and analyses

1996 ◽  
Vol 23 (2) ◽  
pp. 358-372
Author(s):  
Geneviève Pelletier ◽  
Ronald D. Townsend
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Energy Savings ◽  
Treatment Plant ◽  
Preceding Paper ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Study Objective ◽  
Pump Scheduling

The principal objective of this study was to optimize pump scheduling and reservoir releases in the Regional Municipality of Ottawa-Carleton's (RMOC) water supply system with a view to reducing hydro-related operating costs. Basically, hourly demands are to be met with minimum pumping costs. The preceding paper (part I) describes the RMOC system and the numerical model used in the optimization analysis. This paper (part II) presents the main results obtained from the optimization and also reports on the second study objective, which was to investigate the impacts on system operating costs of increasing (i) reservoir storage capacity, (ii) treatment plant capacity, and (iii) water demand by consumers. In general, linear programming was found to be a good modelling option for generating optimized pump schedules and service reservoir releases. The analyses of water management alternatives confirmed that RMOC's water supply system was designed for maximum day water demand; however, day-to-day operations would be facilitated if present storage and (or) treatment facilities were enlarged. Economically, it would be difficult to justify construction costs from the potential energy savings obtained from this study and therefore it seems important to start managing demand. Key words: water supply system, pump scheduling, pumping costs, optimization, modelling.

Optimization of the Regional Municipality of Ottawa-Carleton's water supply system operations. I. Model development

1996 ◽  
Vol 23 (2) ◽  
pp. 347-357 ◽  
Author(s):  
Geneviève Pelletier ◽  
Ronald D. Townsend
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Model Development ◽  
Treatment Plant ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Pump Scheduling ◽  
Tariff Structure ◽  
The Impact

The principal objective of this study was to optimize pump scheduling and reservoir releases in the Regional Municipality of Ottawa-Carleton's (RMOC) water supply system with a view to reducing electricity-related operating costs. Pump schedules and reservoir releases for enhanced operation were obtained using a linear programming optimization model that incorporated Ottawa Hydro's electricity tariff structure for "large" users. A second objective was to investigate the impact on system operating costs of increasing (i) reservoir storage capacity, (ii) treatment plant capacity, and (iii) water demand by consumers. This paper (part I) describes the RMOC distribution system and reviews the model development. The next paper (part II) presents the analyses performed for the two study objectives, and important results. Key words: water supply system, pump scheduling, pumping costs, optimization, modelling.

scholarly journals Sustainability characteristics of drinking water supply

2020 ◽  
Author(s):  
Jolijn van Engelenburg ◽  
Erik van Slobbe ◽  
Adriaan J. Teuling ◽  
Remko Uijlenhoet ◽  
Petra Hellegers
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Demand ◽  
Supply System ◽  
Water Supply System ◽  
Drinking Water Supply ◽  
Extreme Weather Events ◽  
Water Supply Systems ◽  
Global Issues ◽  
Drinking Water Supply System

Abstract. Developments such as climate change and growing demand for drinking water threaten the sustainability of drinking water supply worldwide. To deal with this threat, adaptation of drinking water supply systems is imperative, not only on a global and national scale, but particularly on a local scale. This investigation sought to establish characteristics that describe the sustainability of local drinking water supply. We use an integrated systems approach, describing the local drinking water supply system in terms of hydrological, technical and socio-economic characteristics that determine the sustainability of a local drinking water supply system. Three cases on drinking water supply in the Netherlands are analysed. One case relates to a short-term development, that is the 2018 summer drought, and two concern long-term phenomena, that is, changes in water quality and growth in drinking water demand. The approach taken recognises that next to extreme weather events, socio-economic developments will be among the main drivers of changes in drinking water supply. Effects of pressures associated with, for example, population growth, industrial developments and land use changes, could result in limited water resource availability, deteriorated groundwater quality and growing water demand. To gain a perspective on the case study findings broader than the Dutch context, the sustainability issues identified were paired with global issues concerning sustainable drinking water supply. This resulted in a proposed set of generally applicable sustainability characteristics, each divided into five criteria describing the hydrological, technical and socio-economic sustainability of a local drinking water supply system. Elaboration of these sustainability characteristics and criteria into a sustainability assessment can provide information on the challenges and trade-offs inherent in the sustainable development and management of a local drinking water supply system.

scholarly journals Research solutions technical - water technology to reduce the water loss for water supply system of Hochiminh city

2013 ◽  
Vol 16 (1) ◽  
pp. 49-57
Author(s):  
Tuan Anh Vo
Keyword(s):  
Water Supply ◽  
Water Loss ◽  
Salt Water ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Supply System ◽  
Water Supply System ◽  
The Sustainable Development ◽  
Pipe System ◽  
Pipe Line

The HCMC water supply system have built from the French Colonial period, and developed without planning and systematic study during the war time. In the beginning, this system used for the small town Saigon- Gia Dinh. Today, the capacity of water supply system is 1,85 million m3/day and will increase up to 2,5 million in next few year and up to 4-5 million m3/day according with the HCMC water supply system planning approved by Government. The climate change issues, salt water lever increase, polution... affect directly into the raw water resource of the existing and future water treatment plant. Beside that, the big size water supply transmission pipe line and the distribution water supply system of 06 hydrolique zone in HCMC damaged according with time : bad quality and No- update information of pipe system… It bring the real water loss level in HCMC so high up to 40% - 50% .The acceptable technologies & techniques solution to find the leak, optimal management for the water supply system to reduce the water loss is extremely essential, to support the clean water resources for the sustainable development of the HCM City.

scholarly journals Analysis of the water meter management of the urban-rural water supply system

2018 ◽  
Vol 44 ◽  
pp. 00051 ◽  
Author(s):  
Joanna Gwozdziej-Mazur ◽  
Kamil Świętochowski
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Supply System ◽  
Water Supply System ◽  
Water Losses ◽  
Rural Water Supply ◽  
Rural Water ◽  
Urban Rural ◽  
Water Supply Company ◽  
Water Meter

Water losses in the water supply network pose a continuous challenge for water companies. Already during designing new networks, the designer assumes that the amount of water demand must be increased by a certain percentage (usually by 10% of the total average daily water demand for municipal and industrial purposes) due to the possible occurrence of water losses. Water loss is meant the difference between the amount of water injected into the network and the amount of water used and invoiced, i.e. that brings income for the water supply company. Proper water metering management helps to limit water losses. This paper presents analysis of the water meter management of urban-rural water supply system.

scholarly journals OPTIMIZATION OF HIGH PREASURE PIPELINE IN THE PRESSURE PIPE OF WATER SUPPLY

2017 ◽  
Vol 1 (17) ◽  
Author(s):  
Nedim Suljić ◽  
Jasmin Hrnjadović
Keyword(s):  
Water Supply ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Complete Analysis ◽  
Pressure Pipe ◽  
Pressure Pipeline ◽  
Basic Parameters ◽  
Quality Water ◽  
The Impact

The water supply system is a set of facilities related to a functional unit with the primary aim ofensuring sufficient quantities of quality water by the most economical way. Design and implementationof such systems requires extensive previous research and analysis aimed at finding the optimal solutionof water supply system.This paper presents an analysis of the pressure pipeline of the water supply system in which discussedseveral alternatives with different input parameters. It is shown the influence of the position and thenumber of tanks in the system on the basic parameters such as a pressure in the pipeline, power of pumpunits and so on. It's analyzed the impact of changes in diameter of the pipe to the hydraulic parameters,and also to the initial and operating costs of the system. The main aim of the complete analysis is toestablish a uniform depending of the analyzed elements in the system and finding the optimalparameters and their relationship that provide the most appropriate solution from the technical andeconomic aspects.

Converting scientific research into a practical tool co-designed with the stakeholders in R Shiny: a web-based application for managing the main reservoir of the drinking water supply system in the Romagna region, Italy

2020 ◽  
Author(s):  
Alessio Pugliese ◽  
Mattia Neri ◽  
Armando Brath ◽  
Elena Toth
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Demand ◽  
Scientific Research ◽  
Supply System ◽  
Water Supply System ◽  
Climate Impacts ◽  
Drinking Water Supply ◽  
Web Based ◽  
Drinking Water Supply System

<p>Complex water optimisation problems represent one of the biggest challenges of the near future due to human and climate impacts. On the one hand, stakeholders in the water supply sector require high-level knowledge of the whole water cycle process at different scales, with the aim to either assess the risk for uncertain future water availability or rely on more analytic approaches for decision making. On the other hand, scientific research produces high quality models, algorithms and schemes capable of solving the water problems, but scientists often struggle when it comes to deploy tools that deliver their research outcomes to stakeholders and decision makers that ultimately will use them. The principal goal of this project is to fill the gap between the development of innovative research methodologies and their practical usability in the real world. We present “RApp”, a web-based application written purely in R within the Shiny framework and developed in collaboration with the water supply company Romagna Acque SpA. RApp simulates and visualizes the behavior of the reservoir that sustains the drinking water supply system of the Romagna region, Italy, in order to support its optimal management. Reservoir simulations are obtained connecting, through a unique and site-specific modelling chain, the inflows from the upstream catchments, the functioning of the reservoir, the potential of the treatment plant and the water demand. The optimized monthly-based management rules were obtained off-line, through a multi-objective optimization algorithm by maximizing the water yields and, at the same time, minimizing the occurrence of water outages during drought periods. The RApp user can produce quick reports of the past and expected reservoir yields and stored volumes, in terms of either graphical or table outputs, as a function of different initial and boundary conditions provided by the users, such as the initial stored volume, the expected inflows, the adoption of optimized or user-defined management rules, the occurrence of an abrupt change in the water demand, thus, allowing stakeholders to explore the impact of different scenarios and management options. For developing the tool, a very close interaction between the research group and the stakeholders was required, and is still ongoing, in order to define and then expand the functionalities of the software that are most needed for its practical use.</p>

scholarly journals Sustainability Assessment of the Water Management System for the Boukan Dam, Iran, Using CORDEX- South Asia Climate Projections

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1723
Author(s):  
Farzad Emami ◽  
Manfred Koch
Keyword(s):  
Water Management ◽  
Water Supply ◽  
South Asia ◽  
Water Demand ◽  
Hydrologic Model ◽  
Supply System ◽  
Water Supply System ◽  
Management Tool ◽  
Climate Projections ◽  
Group Index

The present study aimed to quantify the future sustainability of a water supply system using dynamically-downscaled regional climate models (RCMs), produced in the South Asia Coordinated Regional Downscaling Experiment (CORDEX) framework. The case study is the Boukan dam, located on the Zarrine River (ZR) of Urmia’s drying lake basin, Iran. Different CORDEX- models were evaluated for model performance in predicting the temperatures and precipitation in the ZR basin (ZRB). The climate output of the most suitable climate model under the RCP45 and RCP85 scenarios was then bias-corrected for three 19-year-long future periods (2030, 2050, and 2080), and employed as input to the Soil and Water Assessment Tool (SWAT) river basin hydrologic model to simulate future Boukan reservoir inflows. Subsequently, the reservoir operation/water demands in the ZRB were modeled using the MODSIM water management tool for two water demand scenarios, i.e., WDcurrent and WDrecom, which represent the current and the more sustainable water demand scenarios, respectively. The reliability of the dam’s water supply for different water uses in the study area was then investigated by computing the supply/demand ratio (SDR). The results showed that, although the SDRs for the WDrecom were generally higher than that of the WDcurrent, the SDRs were all <1, i.e., future water deficits still prevailed. Finally, the performance of the water supply system was evaluated by means of risk, reliability, resiliency, vulnerability, and maximum deficit indices, and the combination of the indices to estimate the Sustainability Group Index (SGI). The findings indicated that, compared to the historical period for both the water demand scenarios, WDcurrent and WDrecom, the average SGI of each RCP would be decreased significantly, particularly, for the more extreme RCP85 scenario. However, as expected, the SGI decrease for the WDrecom was less than that of the WDcurrent, indicating the advantage of implementing this more sustainable water demand scenario.

Optimal Pump Scheduling to Reduce the Operating Costs

2013 ◽  
Vol 371 ◽  
pp. 677-681
Author(s):  
Simona Adina Miron ◽  
Aurora Alexandrescu ◽  
Mihail Luca
Keyword(s):  
Water Supply ◽  
Flood Control ◽  
Oil Industry ◽  
Optimization Methods ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Multi Objective Optimization ◽  
Lower Elevation ◽  
First Time

The pumps are mechanical structures indispensable in numerous socio-economic areas like: villages water supply, irrigations, oil industry, sewage movement, chemical movement, flood control and for the production of various goods. Pumps must supply the energy necessary to lift liquids from a lower elevation to a greater one. Pumps operation and maintenance generates significant costs. One of the most efficient methods to reduce the pump operating costs is by scheduling the pump operations. This can impose pumps to operate during periods in which the electrical tariff is cheaper and combining the operations of several pumps in an efficient way. This paper aims to analyze the possibilities and the limits of using SPEA2 multi-objective optimization algorithm implemented in Matlab in order to schedule the pumps. SPEA2 was used for the first time to schedule the pumps from a water supply system by [. In that paper the algorithm was applied in Linux. This paper presents the results obtained by SPEA2 implemented in a very used programming language, Matlab. The algorithm was improved in order to obtain better solutions. In this paper we applied the optimization methods of the pump schedule to a water supply system, but these methods can be used to minimize the operational costs of any system that incorporates pumps.

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