scholarly journals Impacts of storage tanks under the indirect cold water supply system on household water quality: a case of Wakiso District, Uganda

2021 ◽  
Author(s):  
Musa Manga ◽  
Lawrence O. Okeny ◽  
Timothy G. Ngobi ◽  
Acheng O. Pamela ◽  
Hidaya Namakula ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Heterotrophic Bacteria ◽  
Cold Water ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Storage Tanks ◽  
Cleaning Methods ◽  
Main Component

Abstract Water supply systems form one of the most fundamental components of building services. In many communities especially in developing countries like Uganda, most households use the indirect cold water supply system, particularly because of the intermittent water supply problems. However, research has linked the main component of this system particularly water storage tanks to contamination of water. There is a paucity of research regarding which features of these tanks contribute to water contamination. This study investigated the effects of storage tank features and cleaning practices on water quality. The results revealed that the treated water received by households became significantly (α= 0.05) contaminated with faecal coliforms (p= 0.001), total coliforms (p < 0.001), and heterotrophic bacteria (p < 0.001) while in storage tanks. Furthermore, Fe, and Mn significantly increased in stored water (with p= 0.001, and p= 0.023, respectively) while residual free chlorine significantly reduced (p < 0.001). The study revealed that tank type, tank connectors, and tank age significantly affect water quality. The study concluded that tank cleaning does not guarantee improvement in quality of stored water. Further research is recommended to determine the best tank cleaning methods and optimal cleaning frequency.

scholarly journals Sustainability characteristics of drinking water supply in the Netherlands

2021 ◽  
Vol 14 (1) ◽  
pp. 1-43
Author(s):  
Jolijn van Engelenburg ◽  
Erik van Slobbe ◽  
Adriaan J. Teuling ◽  
Remko Uijlenhoet ◽  
Petra Hellegers
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
The Netherlands ◽  
Water Supply ◽  
Supply System ◽  
Water Supply System ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Summer Drought ◽  
Drinking Water Supply System

Abstract. Developments such as climate change and a 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. The hypothesis of this research was that sustainability characteristics depend on the context that is analysed, and therefore, a variety of cases must be analysed to reach a better understanding of the sustainability of drinking water supply in the Netherlands. Therefore, three divergent cases on drinking water supply in the Netherlands were analysed. One case related to a short-term development (2018 summer drought), and two concerned long-term phenomena (changes in water quality and growth in drinking water demand). We used 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. To gain a perspective on the case study findings that are broader than the Dutch context, the sustainability aspects identified were paired with global aspects concerning sustainable drinking water supply. This resulted in the following set of hydrological, technical, and socio-economic sustainability characteristics: (1) water quality, water resource availability, and impact of drinking water abstraction; (2) reliability and resilience of the technical system and energy use and environmental impact; (3) drinking water availability, water governance, and land and water use. 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.

Methodological Approaches to Organization of Drinking Water Quality Monitoring Programs

2020 ◽  
pp. 4-8
Author(s):  
Yu.A. Novikova ◽  
I.O. Myasnikov ◽  
A.A. Kovshov ◽  
N.A. Tikhonova ◽  
N.S. Bashketova
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Cold Water ◽  
Water Quality Monitoring ◽  
Drinking Water Quality ◽  
Quality Monitoring ◽  
Water Supply Systems ◽  
Monitoring Programs ◽  
Supply Systems

Summary. Introduction: Drinking water is one of the most important environmental factors sustaining life and determining human health. The goal of the Russian Federal Clean Water Project is to improve drinking water quality through upgrading of water treatment and supply systems using advanced technologies, including those developed by the military-industrial complex. The most informative and reliable sources of information for assessing drinking water quality are the results of systematic laboratory testing obtained within the framework of socio-hygienic monitoring (SGM) and production control carried out by water supply organizations. The objective of our study was to formulate approaches to organizing quality monitoring programs for centralized cold water supply systems. Materials and methods: We reviewed programs and results of drinking water quality laboratory tests performed by Rospotrebnadzor bodies and institutions within the framework of SGM in 2017–2018. Results: We established that drinking water quality monitoring in the constituent entities of the Russian Federation differs significantly in the number of monitoring points (566 in the Krasnoyarsk Krai vs 10 in Sevastopol) and measured indicators, especially sanitary and chemical ones (53 inorganic and organic substances in the Kemerovo Region vs one indicator in the Amur Region). Discussion: For a more complete and objective assessment of drinking water quality in centralized cold water supply systems, monitoring points should be organized at all stages of water supply with account for the coverage of the maximum number of people supplied with water from a particular network. Thus, the number of points in the distribution network should depend, inter alia, on the size of population served. In urban settlements with up to 10,000 inhabitants, for example, at least 4 points should be organized while in the cities with more than 3,000,000 inhabitants at least 80 points are necessary. We developed minimum mandatory lists of indicators and approaches to selecting priority indices to be monitored at all stages of drinking water supply.

scholarly journals OST WATER VOLUME IN WATER SUPPLY SYSTEM, IN NORTH AND CENTRAL WEST REGION

2018 ◽  
Vol 15 (30) ◽  
pp. 497-503
Author(s):  
A. B. dos SANTOS ◽  
É. C. DIAS ◽  
G. P. C. da SILVA ◽  
R. P. RIBEIRO ◽  
A. M. SILVA
Keyword(s):  
Water Supply ◽  
Service Providers ◽  
Supply System ◽  
Water Supply System ◽  
Water Volume ◽  
Water Supply Systems ◽  
Water Losses ◽  
Efficient Operation ◽  
The North ◽  
West Region

Due to the events of the last years, when, mainly the Southeast region of Brazil has experienced one of the worst periods of water shortage, there has been a process of national awareness for the need of care with the quality and quantity of water. Therefore, currently in the national and world scenario is seeking to minimize the waste of water, acting mainly in the water supply systems, which have the highest loss rates of this liquid. In this way, the objective is to determine the volume of water (1000m³/year) wasted in SAA (Water Supply System), based on the amount of water produced and consumed in the North and Central-West region of Brazil and, from this, compare the losses in those regions, for the year 2015. Based on the analysis of the datas, it was verified that the water supply in the North and Central-West regions presented high losses rates, 43% and 37%, respectively. Actions such as maintenance of sanitary fittings and elimination of leaks in the residence, more efficient operation and maintenance of the system and improvement in the commercial management of service providers, are measures to combat and reduce water losses.

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 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.

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.

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