scholarly journals The Concept Of Fuzzy Modeling Of Safety In Collective Water Supply Systems Using Bayesian Network

2015 ◽  
Vol 35 (1) ◽  
pp. 119-126
Author(s):  
Barbara Tchórzewska – Cieślak ◽  
Dawid Szpak
Keyword(s):  
Water Supply ◽  
Bayesian Networks ◽  
Bayesian Network ◽  
Theoretical Basis ◽  
Fuzzy Modeling ◽  
Supply System ◽  
Water Supply Systems ◽  
Fuzzy Probability ◽  
Supply Systems ◽  
The City

AbstractThe paper presents the use of fuzzy Bayesian network in safety modeling with regard to collective water supply system (CWSS). The theoretical basis of Bayesian networks and fuzzy modeling were presented. The paper presents failure events threatening the CWSS safety. The probability of the risk of lack of water supply to the city was designated. The model allows to determine the fuzzy probability of the risk at a given level.

scholarly journals About the question of the assessment of the drinking water quality in centralized water systems in the current conditions

2020 ◽  
Vol 99 (6) ◽  
pp. 563-568
Author(s):  
Yuliya A. Novikova ◽  
K. B. Friedman ◽  
V. N. Fedorov ◽  
A. A. Kovshov ◽  
N. A. Tikhonova ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Supply System ◽  
Drinking Water Quality ◽  
Water Supply Systems ◽  
High Quality ◽  
Supply Systems ◽  
The City

Introduction. Regulation of drinking water quality is a very important area of health care and improving the quality of life of the population of the Russian Federation.The aim of this work is the development a model for the assessment of the drinking water quality and calculating the share of the population, including urban, provided with high-quality drinking water from centralized water supply systems, taking into account new methodological approaches to the evaluation of the quality of drinking water using the example of water supply to settlements in the Leningrad Region. Material and methods. The data on the organization of centralized cold water supply systems and monitoring systems for drinking water quality and the results of laboratory studies of drinking water quality in the cities of Volkhov, Svetogorsk, Slantsy, Tosno were studied. Statistical processing of the results was performed, the categories of quality of drinking water supplied to the population were determined, the number of the population provided with high-quality drinking water from the water supply system was calculated in accordance with Guidelines 2.1.4.0143-19.Results. In 2018, 100% of the population was provided with quality drinking water only in the city of Slantsy. In the city of Tosno, this index reached of 83.5%. In the cities of Volkhov and Svetogorsk, drinking water was rated as low-quality. But it is worth noting that in the cities of Volkhov and Slantsy laboratory tests were carried out at 2 points, in the city of Svetogorsk - only at the 1 point, which, given the number of residents, is not enough. For an objective assessment of the state of drinking water and the development of measures aimed at improving its quality, it is necessary to increase the number of monitoring points, as well as to include the results of control and supervision measures and production laboratory control conducted by water supply organizations in the volume of laboratory information.Conclusion. The proposed model allows us to assess the drinking water quality in centralized water supply systems and the proportion of the population, including urban, provided with quality drinking water at the level of the water supply system, settlement, municipal district (urban district), subject of the Russian Federation

scholarly journals INCREASING OF THE RELIABILITY CITY'S WATER SUPPLY SYSTEM THROUGH ZONING

2020 ◽  
Vol 1 (154) ◽  
pp. 143-147
Author(s):  
О. Matyash ◽  
V. Novokhatniy
Keyword(s):  
Water Supply ◽  
Flow Parameter ◽  
Supply System ◽  
Water Supply System ◽  
Integrated System ◽  
Water Supply Systems ◽  
Steel Pipes ◽  
Water Pipes ◽  
Supply Systems ◽  
The City

The article analyzes the topical issue of assessing the reliability of water supply in Kremenchuk, Poltava region, in the zoning of the water supply system. The scheme of the integrated water supply system of Kremenchuk was built to calculate reliability, which reflects the movement of water from the source to the consumers and the main structures of the water supply system. The work of the water supply system of Kremenchuk and its structure is analyzed. In terms of reliability, it is concluded that water pipes are the least reliable element. The statistics on the failures of the water supply systems of the city of Kremenchuk are analyzed. The calculations showed that the actual failure rate for steel pipes d = 1100 mm of water pipes in Kremenchug is 2 failures per 10 km of steel pipe per year, which is 2 times higher than foreign and domestic data. The reliability assessment of both the integrated and district water supply system of Kremenchuk was performed on the failure of water supply systems for both separately connected individual elements. Comparative analysis of reliability of the integrated and district water supply system of Kremenchuk without fail has shown that the zoning significantly increases the reliability of water supply in the Kryukivsky district, and the reliability of water supply of the Avtozavodsky district remains unchanged. In the integrated system in the Kryukiv district, the parameter of the flow of failures was 1/year, that is, about 3 times a year a break in water supply is possible. In the district system, both systems operate independently, which is why everything remains unchanged in the Avtozavodsky district, and the failure flow parameter for the Kryukivsky district is significantly reduced and is: 1/year, which corresponds to a water supply interruption of about once every 2.5 years. Thus, zoning can increase the reliability of water supply in the Kryukovsky district of Kremenchuk approximately 8 times. Keywords: the water supply system, reliability, dependability, zoning.

scholarly journals Reconstruction of the Water Supply to the City of Igarka of Krasnoyarsk Region

2021 ◽  
pp. 187-197
Author(s):  
Gregory V. Krasavin ◽  
Anatoly I. Matiushenko
Keyword(s):  
Water Supply ◽  
Water Intake ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Far North ◽  
Krasnoyarsk Region ◽  
Supply Systems ◽  
The City

Some features of use of water supply systems in the conditions of the Far North are stated. the considered water supply system in Igarka prior to the reconstruction. The reasons for the need for reconstruction of existing water intake facilities are presented. The composition of the reconstructed water intake facilities is described. The experience of operation of reconstructed water supply facilities in Igarka is summarized

scholarly journals Energy Recovery Using Micro-Hydropower Technology in Water Supply Systems: The Case Study of the City of Fribourg

Water ◽  
2016 ◽  
Vol 8 (8) ◽  
pp. 344 ◽  
Author(s):  
Irene Samora ◽  
Pedro Manso ◽  
Mário Franca ◽  
Anton Schleiss ◽  
Helena Ramos
Keyword(s):  
Water Supply ◽  
Energy Recovery ◽  
Water Supply Systems ◽  
Supply Systems ◽  
The City

scholarly journals Modeling Study of Design Flow Rates for Cascade Water Supply Systems in Residential Skyscrapers

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2580
Author(s):  
Yang Zhou ◽  
Eric Lee ◽  
Ling-Tim Wong ◽  
Kwok-Wai Mui
Keyword(s):  
Water Supply ◽  
Mathematical Models ◽  
Flow Rate ◽  
Supply System ◽  
Water Supply System ◽  
Design Flow ◽  
Water Volume ◽  
Water Supply Systems ◽  
Supply Systems ◽  
Design Flow Rate

Skyscrapers are common nowadays around the world, especially in cities with limited development area. In order to pump water up to the higher level of a skyscraper, a cascade water supply system has to be installed. Currently, cascade water supply systems are mainly designed based on practical experiences or requirements of existing standards/guidelines that, in fact, are not specifically for skyscrapers. However, thorough studies on cascade water supply system designs are still limited in the literature. This study proposes mathematical models and uses Monte Carlo simulations to evaluate the design flow rate of a typical cascade water supply system that feeds various appliances in a residential skyscraper in Hong Kong. Graphs that showed the correlations between the inflow rate in the supply pipe and water volume in the tank are obtained. While tank storage volume is confirmed, the design flow rate of the cascade water supply system can be determined from these graphs. The proposed mathematical models can also be applied to evaluate the design flow rate of cascade water supply systems in other types of skyscrapers (e.g., office, commercial building) as well as with the changes in water demand patterns in the models.

Linking resource users' perceptions and collective action in commons management – an examination of water supply systems in Southern Senegal

Water Policy ◽  
2011 ◽  
Vol 14 (1) ◽  
pp. 127-147 ◽  
Author(s):  
Atsushi Hanatani ◽  
Kana Fuse
Keyword(s):  
Regression Analysis ◽  
Water Supply ◽  
Critical Issue ◽  
Supply System ◽  
Sub Saharan Africa ◽  
Water Supply Systems ◽  
Piped Water ◽  
Borehole Water ◽  
Sub Saharan ◽  
Supply Systems

Poor maintenance of water supply systems is a critical issue in sub-Saharan Africa. Using survey data on users of motorized piped water supply systems in rural southern Senegal, this paper examines what motivates resource users to contribute financially to the management of water supply system infrastructure by paying their water tariff. Results from logistic regression analysis indicate that users who prefer borehole water and are satisfied with the service provided are more likely than others to pay. In addition, those who trust that other users will pay are more likely themselves to pay than those who do not trust their peers. These findings suggest that assessing the needs of users and providing services tailored to those needs (e.g., quality, convenience) is recommended for future interventions. The incorporation of programs that promote peer trust should also be considered as future interventions to establish or strengthen resource management organization.

Barcelona's water supply, 1867–1967: the transition to a modern system

Urban History ◽  
2013 ◽  
Vol 41 (3) ◽  
pp. 415-434 ◽  
Author(s):  
MANEL GUARDIA ◽  
MARIBEL ROSSELLÓ ◽  
SERGI GARRIGA
Keyword(s):  
Water Supply ◽  
Cultural Context ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Domestic Sphere ◽  
Modern System ◽  
Expansion Plan ◽  
Water Companies ◽  
Supply Systems

ABSTRACTThe development of modern water supply systems has varied widely in terms of speed, paths and results, and each supply system has been strongly conditioned by its spatial, socio-economic and cultural context. Barcelona provides a useful illustration of how such a modern system came into being in a particularly dynamic southern European setting. Despite being Spain's leading industrial centre, the driving force behind the introduction of its new water supply system did not come from an industrial imperative but rather from the city's expansion plan, approved in 1859, which gave rise to a proliferation of private initiatives. Later, decisive changes around the turn of the twentieth century led to a concentration of water companies, sewer renewal projects and the entry of water into the domestic sphere, and the extension of the water supply to people's homes. The development of a modern water supply system in Barcelona, however, required a period of a hundred years – from 1867, when the first steam-powered pumping station was built, to 1967, when the water from the Ter River transfer reached the city, allowing new consumption patterns to spread rapidly.

Frequency pressure regulation in water supply systems

2013 ◽  
Vol 13 (4) ◽  
pp. 896-905 ◽  
Author(s):  
Ivan Halkijevic ◽  
Zivko Vukovic ◽  
Drazen Vouk
Keyword(s):  
Water Supply ◽  
Cost Effective ◽  
Pressure Control ◽  
Water Supply Systems ◽  
Pressure Regulation ◽  
Effective Activity ◽  
Variable Frequency Drives ◽  
Loss Control ◽  
Supply Systems ◽  
The City

In water supply systems, pressure management in most cases is proven to be the most cost-effective activity related to water loss control. As an advanced method of pressure control, it is possible to use variable frequency drives for centrifugal pump control. Pressure regulation can be performed with constant pressure or with proportional pressure control. The application of proportional pressure control is particularly applicable in water supply systems as the operating pump performance is constantly adapting the pressure to the actual demand. Along with lower leakage losses, it also results in lower energy consumption and the elimination of non-stationary phenomena, thereby extending the pump lifetime. Therefore, the paper presents a theoretical discussion of the proportional pressure control. Possible savings are shown on the numerical example of water supply system of the city of Velika Gorica.

scholarly journals Understanding Regulation of Non-Utility Water Supply Systems from the Household Perspective

2021 ◽  
Author(s):  
Iniobong James Ikpeh ◽  
Robby Soetanto ◽  
Aaron Anvuur
Keyword(s):  
Water Supply ◽  
Group Discussion ◽  
Regulatory Compliance ◽  
Supply System ◽  
Water Supply System ◽  
Sub Saharan Africa ◽  
Water Supply Systems ◽  
Research Approach ◽  
Water Users ◽  
Supply Systems

Abstract PurposeThe article seeks to examine the understanding of regulation of Non-Utility Water Supply Systems (NUWSS) from perspective of water users in households, the behavioural dimensions of regulation and aspects of the non-utility water supply system that can be regulated.Research Method/DesignThe theory of planned behaviour was used to identify determinants to regulatory compliance across the groups of indicators identified for the regulation of water supply systems. To understand household perception of regulation, interviews were conducted, with questions put to water users in households. A qualitative research approach was adopted, using interviews, and focus group discussion with water users in households.FindingsThe findings indicate that households hold varied perceptions on regulation across the components of the water supply system. Specifically, regulatory compliance by households was influenced by crucial elements such as preferential compliance to regulation within specific aspects of the water supply system. Limitations and implicationsThe inference from this research is based on households from one state in Nigeria. Further exploration of this research in multiple cities and states would widen the applicability of the findings in different contexts.Originality/valueThe study examines regulation and regulatory compliance from the perspective of households who predominantly use Non-Utility Water Supply System (NUWSS) in sub-Saharan Africa.

scholarly journals Determining Hazards’ Prevention Critical Control Points in Water Supply Systems

2020 ◽  
Vol 2 (1) ◽  
pp. 53 ◽  
Author(s):  
Stavroula Tsitsifli ◽  
Vasilis Kanakoudis
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Supply System ◽  
Water Supply System ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Control Points ◽  
Critical Control Points ◽  
Drinking Water Supply System ◽  
Supply Systems

A drinking water supply system is an extraordinarily complex system—consisting of kilometers of pipes and various tanks, valves, pumps, and other equipment. This complexity makes it extremely vulnerable to physical, chemical, and/or biological hazards. Therefore, the vulnerability assessment of a drinking water supply system to identify the critical control points is absolutely necessary. This paper assesses the vulnerability of the drinking water supply systems. The assessment is elaborated in systems using water from surface water bodies and groundwater bodies. The critical control points are identified using a risk assessment methodology (identifying the probability of the hazard occurrence and its effect or severity) where the monitoring parameters, and the corrective actions are determined.

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