Reliability assessment of water supply systems with storage and distribution networks

1993 ◽  
Vol 29 (8) ◽  
pp. 2917-2924 ◽  
Author(s):  
Okitsugu Fujiwara ◽  
Tharmarajah Ganesharajah
Keyword(s):  
Water Supply ◽  
Reliability Assessment ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Supply Systems

scholarly journals Automated software for hydraulic simulation of pipeline operation

2018 ◽  
Vol 144 ◽  
pp. 01017
Author(s):  
Roman Hurgin
Keyword(s):  
Water Supply ◽  
Computer Aided Design ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Hydraulic Simulation ◽  
Efficient Operation ◽  
Large Cities ◽  
Modern Computer ◽  
Quality Of Water ◽  
Supply Systems

Design of modern water supply systems of large cities as well as their management via renovation of hydraulic models poses time-consuming tasks to researchers, and coping with this task requires specific approaches. When tackling these tasks, water services companies come across a lot of information about various objects of water infrastructure, the majority of which is located underground. In those cases, modern computer-aided design systems containing various components come to help. These systems help to solve a wide array of problems using existing information regarding pipelines, analysis and optimization of their basic parameters. CAD software is becoming an integral part of water supply systems management in large cities, and its capabilities allow engineering and operating companies to not only collect all the necessary data concerning water supply systems in any given city, but also to conduct research aimed at improving various parameters of these systems, including optimization of their hydraulic properties which directly determine the quality of water. This paper contains the analysis of automated CAD software for hydraulic design and management of city water supply systems in order to provide safe and efficient operation of these water supply systems. Authors select the most suitable software that might be used to provide hydraulic compatibility of old and new sections of water supply ring mains after selective or continuous draw-in renovation and decrease in diameter of distribution networks against the background of water consumption decrease in the cities.

Reliability Assessment for Water Supply Systems under Uncertainties

2014 ◽  
Vol 140 (4) ◽  
pp. 468-479 ◽  
Author(s):  
M. Shafiqul Islam ◽  
Rehan Sadiq ◽  
Manuel J. Rodriguez ◽  
Homayoun Najjaran ◽  
Mina Hoorfar
Keyword(s):  
Water Supply ◽  
Reliability Assessment ◽  
Water Supply Systems ◽  
Supply Systems

Оптимизация выбора диаметров трубопроводов водопроводной сети с учетом обеспечения противопожарных требований

2020 ◽  
Author(s):  
O. Primin
Keyword(s):  
Water Supply ◽  
Distribution Network ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Negative Consequences ◽  
Flow Rates ◽  
Municipal Water Supply ◽  
Fire Extinguishing ◽  
Supply Systems

При устройстве объединенных систем хозяйственно-питьевого и противопожарного водоснабжения значение распределительной сети возрастает еще больше, так как на нее возлагаются дополнительные функции по транспортировке больших расходов воды на пожаротушение. Обеспечение противопожарных требований в условиях значительного снижения водопотребления в большинстве городов России приводит к негативным последствиям, связанным с малыми (0,10,3 м/с и менее) скоростями течения и застаиванием воды на отдельных участках сети. Из-за этого возможно ухудшение органолептических свойств воды, что выражается в появлении привкусов, неприятных запахов, повышении мутности и цветности и т. д. В связи с этим требуется проведение мероприятий для оптимизации выбора диаметров труб, обеспечения и сохранения требуемого качества транспортируемой воды в наружных городских и распределительных сетях, гарантированного обеспечения требуемых норм на пожаротушение. Приведены результаты исследований и гидравлические расчеты по оценке минимально допустимых скоростей движения воды и минимальных диаметров труб внутриквартальных сетей с учетом обеспечения наружного и внутреннего пожара. Испытания проведены в реальных условиях кольцевой водопроводной сети города в зонах повышенного и пониженного давления.With the arrangement of combined drinking water and fire water supply systems, the importance of the distribution network increases even more, since additional functions are assigned to provide for the transportation of large amounts of water for firefighting. Meeting the firefighting requirements in conditions of a significant reduction in water consumption in most cities of Russia leads to negative consequences associated with low (0.10.3 m/s and less) flow rates and stagnation of water in some sections of the distribution network. Thereby, the organoleptic properties of water may deteriorate expressed in the appearance of flavors, unpleasant odors, increased turbidity and color, etc. In this regard, measures are required to optimize the choice of pipe diameters, to ensure and maintain the required quality of transported water in outdoor urban and distribution networks, and to guarantee meeting the required fire extinguishing standards. The research results and hydraulic calculations for assessing the minimum permissible water flow rates and minimum pipe diameters of submain networks are given taking into account the provision of external and internal firefighting. The tests were carried out in real conditions of the municipal water supply ring main in high- and low-pressure zones.

scholarly journals PRELIMINARY TECHNICAL ASSESSMENT OF WATER DISTRIBUTION NETWORKS

2015 ◽  
Vol 1 (2) ◽  
pp. 129-134
Author(s):  
Ladislav Tuhovčák ◽  
Miloslav Tauš ◽  
Tomáš Sucháček
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Distribution Networks ◽  
Technical Condition ◽  
Water Supply Systems ◽  
Software Application ◽  
Investment Projects ◽  
Starting Point ◽  
Water Mains ◽  
Supply Systems

The knowledge of the current technical condition of the operated system is in the interest of the owner or operator of public water supply systems. Such information is the starting point when making decisions on investment projects or planning water mains renewal. The submitted paper introduces the methodology of preliminary assessment of the technical condition of water supply systems and outputs of the software application TEA Water, which makes it possible to assess the technical condition of the specific elements of the water supply systems and clear displaying with the presentation of the assessment results for the entire considered water supply system.

scholarly journals Spatiotemporal Water Quality Variations in Smaller Water Supply Systems: Using Modified CCME WQI from Groundwater Source to Distribution Networks

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1884 ◽  
Author(s):  
Haider ◽  
Alkhowaiter ◽  
Shafiquzzaman ◽  
AlSaleem ◽  
Almoshaogeh ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Distribution Network ◽  
Distribution Networks ◽  
Management Tool ◽  
Water Supply Systems ◽  
Canadian Council ◽  
Groundwater Source ◽  
Ccme Wqi ◽  
Supply Systems

Original Canadian Council of Minster of the Environment Water Quality Index (CCME WQI) is being used for assessing the water quality of surface water sources and distribution systems on a case by case basis. Its full potential as a management tool for complete water supply systems (WSSs) has yet to be recognized at the global level. A framework is developed using the modified CCME WQI to assess spatiotemporal water quality from groundwater source to treatment and distribution networks in smaller systems. The modified index resolves a limitation of the original index by also evaluating the microbiological water quality parameters which have to be completely absent for meeting desired drinking water quality standards. The framework divides the distribution network in different zones, which are further segregated into districts, to improve the decision-making process. Temporal assessment identifies the seasons with higher probabilities of failures, while the spatial assessment provides an insight on the performance (i.e., Excellent to Poor) of each district in a distribution network. In addition to failure probability, risk mapping gives appropriate attention to the number of consumers in different districts. Application of the framework on two smaller WSSs (population less than 50,000) in Qassim region revealed that the remotely located districts from the treatment facility underperform in comparison to the closely situated districts. Managers can effectively apply the proposed framework to identify the locations and periods of water quality failures in each component (i.e., source, treatment, and distribution) of a smaller WSS for effective utilization of their resources in Saudi Arabia and elsewhere with similar conditions.

scholarly journals GIS use of Land Use/Land Cover layers and historical data for water losses indices

2019 ◽  
Vol 85 ◽  
pp. 07009
Author(s):  
Alexandru Aldea ◽  
Mihaela Aldea ◽  
Sorin Perju
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Historical Data ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Land Use Land Cover ◽  
Water Losses ◽  
Decision Factors ◽  
Supply Systems

The population growth and/or its use and development of the land is a continuous preoccupation of the decision factors regarding the water supply system in general and the development of the potable water distribution networks in particular. This issue is even more critical especially in the areas of big cities and important urban growing. As the urbanization of land outgrows the existing water supply systems, one of the possible solutions is to expand the water distribution network in order to cover this urban growth. The present paper analyses further the possibilities to define and use certain indices of urban development together with water loss indices in order to determine trends or issues related with the provision of water supply services and connectivity.

scholarly journals Studies on the Implementation of GIS Model in Water Supply Systems

2016 ◽  
Vol 10 (2) ◽  
pp. 153-160
Author(s):  
Iustina Lateş ◽  
Mihail Luca ◽  
Gelu Ilie ◽  
Nicoleta Iurist
Keyword(s):  
Water Supply ◽  
Distribution Networks ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Urban Water Supply ◽  
Supply Networks ◽  
Main Components ◽  
Functional Components ◽  
Supply Systems

Abstract The paper presents research conducted on the optimization of urban water supply networks. One direction of optimization follows the use of GIS models for digitization on components system. The use of water supply system operation depends on the proper functioning of the structural and functional components. In the analysis it was found that the main components of the system are the following: capture, headrace, puming stations, reservoirs, distribution networks. Each component is made up of a multitude of sub-components with specific structural and functional character. Using GIS program it follows to specify custom properties using layers of structural and functional domains. Autocad Civil 3D, GisNet Set, ArcGis Server and Autocad Toolbase programs allowed to obtain thematic maps on specific areas of the system. The model of the study can vary from simple to complex and can be generalized to any water supply system for a specific use (urban area, villages, tourist resorts, shopping complexes etc.).

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