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Kvalitetsgranskning av flödesdata från vattenledningsnätet / Quality control of flow meter data from water supply networksEliasson, Victor January 2016 (has links)
In an attempt to revise the guidelines which are the basis of today’s design of water and sewage systems, Tyréns carries out a project for Swedish Water & Wastewater Association (SWWA). This SWWA project aims to, based on flow meter data, map out the behavior pattern regarding water consumption for certain types of consumers, such as industrial or individual users. The overall goal is to get a better support for the dimensioning process. A prerequisite for SWWA study is that the data to be analyzed are of good quality. Therefore this thesis will be included as a sub-study for the SWWA project with the goal to find and test methods for quality control of the flow meter data. This thesis showed some methods to statistically validate the data. A method is for instance presented that is used to detect changes in the statistical distribution for the sets of flow meter data. The changes that were studied were either changes in mean or variance. The latter turned out to be able to detect sequences, mostly during the summer, when the daily variations in water demand is different than during the rest of the year. Furthermore, some outliers could be identified using regression analysis. Some measurement errors, such as repeated flow values, could also be detected using run length encoding. In identifying anomalies and outliers, some types of those were possible to explain as false flow observation or non-representative for the data series as a whole for further analysis in the SWWA project. Other suspected observations were not possible to declare as true erroneous and have therefore been flagged for further investigation with support by an expert in the field. / I ett försök att revidera de riktlinjer som ligger till grund för dagens dimensionering av vatten- och avloppsledningsnät, genomför Tyréns ett projekt för Svenskt Vatten Utveckling (SVU). Detta SVU-projekt syftar till att utifrån flödesdata från vattenledningsnätet kartlägga beteendemönster hos olika förbrukartypers vattenförbrukning, såsom storförbrukare och enskilda brukare, för att på så vis kunna erhålla bättre och mer aktuella underlag för dimensioneringen. En förutsättning för SVU-studien är att det mätdata som ska analyseras håller god kvalitet. Därför kommer detta examensarbete att ingå som en understudie till SVU-projektet med syftet att finna en metod för att kvalitetsgranska flödesdata. Detta examensarbete visade metoder för att statistiskt granska flödesdatat med avseende på outliers och anomalier. Bland annat presenterades en metod för att finna förändringar i mätseriernas statistiska fördelning. De förändringar som studerades var antingen förändring av medelvärde eller en förändring av variansen. Den senare visade sig kunna detektera sekvenser, framförallt under sommaren, där dygnsvariationen i vattenförbrukningen ofta var annorlunda mot resten av året. Vidare kunde outliers detekteras med hjälp av regressionsanalyser på mätserierna. Olika mätfel, exempelvis mätvärden som upprepas, kunde även identifieras med hjälp av skurlängdskodning. Vid identifiering av anomalier eller outliers har vissa typer kunnat detekteras och förklarats som felaktiga värden eller icke representativa för mätserien för vidare analyser. Andra identifierade suspekta mätvärden har inte kunnat förklaras eller det har inte kunnat säkerställas att de är felaktiga. Dessa har markerats och bör studeras av en expert inom ämnesområdet.
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Factors influencing phytoplankton composition in Wingecarribee and Fitzroy Falls ReservoirsFurler, Wayne, n/a January 1990 (has links)
Wingecarribee and Fitzroy Falls Reservoirs are part of the Shoalhaven
system within the Sydney metropolitan water supply network and are both
shallow, well mixed, polymictic water bodies. After construction in 1973,
land use activities within the catchments changed from low intensity grazing
to more intensive practices such as dairying, particularly on the northern
foreshore of Wingecarribee Reservoir, and vegetable farming around Fitzroy
Falls Reservoir. The change in land use practice raised concerns about the
possible impact on water quality of the reservoirs. This study sought to
differentiate between the influence of catchment effects, inter-reservoir
transfers and seasonality to enable an assessment of long term trends in
water quality to be made.
Data collected on a monthly basis by the Water Board between October
1973 and December 1985 were assessed and representative or 'indicator'
variables for the different influences were selected. Classification of the
phytoplankton to create sample clusters followed by discriminant analysis of
the abiotic data were performed to rank the 'indicator' variables
The classification analyses indicated that time of sampling was more
important than site differences in determining clustering and that both
Wingecarribee and Fitzroy Falls Reservoirs were well mixed and similar. The
influence of chronological changes following the initial filling of the
reservoirs, seasonality and inter-reservoir transfers were detected in the
clustering patterns. Changes attributable to land use activities within the
catchments were not detected. The reduction in concentrations of variables
from high values following the initial filling of the reservoirs was the
main influence regulating clustering between 1974 to 1982 and the influence
of seasonality on clustering was most apparent during 1976 and 1978. The
assessment of the influence of inter-reservoir transfers was restricted
because of limited data.
Seasonal periodicities and ongoing changes in the phytoplankton and
physical and chemical data over the study period were assessed as a means of
interpreting and verifying the analysis results.
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Hydraulická analýza vodovodní sítě obce Ostopovice / Hydraulic analysis of the water supply network of the municipality of OstopoviceJaroš, Zdeněk January 2021 (has links)
The theses focuses on a hydraulic analysis of a water supply network of a village called Ostopovice, located in South Moravia. Theses presents a detailed quasi-dynamic hydraulic simulation of the water supply network based on own consumer field survey. Subsequently, the assembled model was calibrated and verified by hydraulic data measured on the water supply network. The model was made to simulate characteristic water supply system operating conditions. Using the hydraulic analysis results, the theses assesses network pressure conditions with regards to the existing building range and type, taking into the account the extent of expected house development of the area. The work concludes with a proposition for measures leading to the water supply network pressure conditions optimization.
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Detecção de vazamentos e alterações em redes de distribuição de água para abastecimento, durante a operação, usando sinais de pressão / Leak and anomaly detection on water supply networks, while operating, using pressure signalsMaria Mercedes Gamboa Medina 16 August 2017 (has links)
O controle ativo de vazamentos é fundamental para o gerenciamento dos recursos hídricos, e particularmente o problema de sua detecção precisa de alternativas de solução. Nesta pesquisa foram desenvolvidos três métodos para detecção da ocorrência de vazamentos ou outras alterações em redes de distribuição de água para abastecimento, durante operação, com base na análise dos sinais de pressão adquiridos por monitoramento permanente na rede. Os métodos foram desenvolvidos com informações de um estudo de caso real, e fundamentam-se em cadeias de Markov, em controle estatístico de processos, e em comparação com padrões, respetivamente. Seu desempenho global foi quantificado com a área abaixo da curva ROC, obtendo valores médios de 0,67, 0,65 e 0,71, respetivamente. Foi encontrado que a ocorrência de vazamentos produz mudanças nas pressões medidas na rede, mas tais mudanças podem ser próximas às que acontecem pela operação normal, de forma que os métodos propostos constituem ferramentas de suporte ao gerenciamento úteis, sem atingir a detecção e diferenciação da totalidade dos vazamentos e alterações. / Active leak control is fundamental on water resources managment, and particullary the detection problem needs alternative solutions. On this research three methods for leak or anomaly detection on operating supply systems were developed, based on analisys of pressure signals acquired by network monitoring. The proposed methods used real data from a case study, and are based on Markov chains, statistical process control, and pattern comparison, respectively. Their overall performances on case study were measured using the area under ROC curve, reaching averages 0,67, 0,65 and 0,71, respectively. It was found that a leak onset result in disturbances on measured preassure, but sometimes those disturbances are close to those of normal operation, therefore proposed methods are useful decision tools, not reaching detection and distinction for all the leaks or anomalies.
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Detecção de vazamentos e alterações em redes de distribuição de água para abastecimento, durante a operação, usando sinais de pressão / Leak and anomaly detection on water supply networks, while operating, using pressure signalsGamboa Medina, Maria Mercedes 16 August 2017 (has links)
O controle ativo de vazamentos é fundamental para o gerenciamento dos recursos hídricos, e particularmente o problema de sua detecção precisa de alternativas de solução. Nesta pesquisa foram desenvolvidos três métodos para detecção da ocorrência de vazamentos ou outras alterações em redes de distribuição de água para abastecimento, durante operação, com base na análise dos sinais de pressão adquiridos por monitoramento permanente na rede. Os métodos foram desenvolvidos com informações de um estudo de caso real, e fundamentam-se em cadeias de Markov, em controle estatístico de processos, e em comparação com padrões, respetivamente. Seu desempenho global foi quantificado com a área abaixo da curva ROC, obtendo valores médios de 0,67, 0,65 e 0,71, respetivamente. Foi encontrado que a ocorrência de vazamentos produz mudanças nas pressões medidas na rede, mas tais mudanças podem ser próximas às que acontecem pela operação normal, de forma que os métodos propostos constituem ferramentas de suporte ao gerenciamento úteis, sem atingir a detecção e diferenciação da totalidade dos vazamentos e alterações. / Active leak control is fundamental on water resources managment, and particullary the detection problem needs alternative solutions. On this research three methods for leak or anomaly detection on operating supply systems were developed, based on analisys of pressure signals acquired by network monitoring. The proposed methods used real data from a case study, and are based on Markov chains, statistical process control, and pattern comparison, respectively. Their overall performances on case study were measured using the area under ROC curve, reaching averages 0,67, 0,65 and 0,71, respectively. It was found that a leak onset result in disturbances on measured preassure, but sometimes those disturbances are close to those of normal operation, therefore proposed methods are useful decision tools, not reaching detection and distinction for all the leaks or anomalies.
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Studie obnovy vybrané části vodovodní sítě / The study of rehabilitation of selected water supply networkSkryja, Marek January 2018 (has links)
This diploma thesis deals with the study of the renewal of a selected part of the water supply network, specifically a section of the steel water supply line near the town of Velké Meziříčí. This study evaluates the current technical condition of the pipeline. Renovation is designed by selected rehabilitation technologies and renewal with the installation of a new pipeline. The thesis also describes the possible substitution of water transport during the shutdown of the part of the water supply network, including the mathematical model. Rehabilitation technologies are compared technically and economically. Also in terms of hydraulic parameters, using the EPANET 2.0 software application.
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Analýza spotřeby vody ve vodovodní síti Valašského Meziříčí / Assessment of drinking water consumption in the water supply network of the Valašské MeziříčíFučík, David January 2019 (has links)
This diploma thesis deals with the analysis of the time series of drains from the water reservoir and evaluation of the minimum night flow in the water supply network of the town of Valašské Meziříčí. In the theoretical part of this thesis were elaborated research of Czech and foreign literature focusing on drinking water consumption analysis, measurement and evaluation of minimum night flow and methods of determination of water losses in distribution systems. The practical part includes analysis of water outflows from reservoirs, evaluation of minimum night flow and determination of basic water loss indicators for selected district metered areas of the network. The above-mentioned water supply network is operated by the Vak Vsetín, a.s.
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Rychlost rozpadu volného chloru ve vodovodní síti / Chlorine decay in the water supply networkKolková, Hana January 2019 (has links)
The diploma thesis deals with the rate of free chlorine dacay in the water supply systems. In the general part of the work are mentioned the forms of chlorine that can be encountered in its use for disinfection of drinking water. Another chapter is the modeling of chlorine decomposition in water during pipeline distribution. This chapter deals with the kinetic reactions of chlorine and their orders, and subsequently with factors influencing the rate of chlorine loss. Closer deals with pipe wall chlorine decay and the bulk water flow chlorine decay. The second part of the diploma thesis is focused on determining the constant kb, which is the rate coefficient of loss of chlorine in the pipeline caused by the flow of water. The work contains several researches of various world studies that deal with this issue. The following is a step-by-step guide to performing this test. The last part deals with the case studies at the waterworks in Kateřinice and Brno. On these tapes the chlorine concentration was measured over time and a constant kb was determined based on these results, expressing the rate of free chlorine decay in bulk water flow.
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Modelování jakosti vody ve vodovodní síti / Modeling of water quality in the water supply networkDukát, Petr January 2022 (has links)
This thesis looks at water quality modelling in the water network, focusing on water age. The initial part of the work identifies the factors that lead to an increase in water age in water supply networks. The theoretical part of the work presents the mathematical relationships and logistical steps that software tools apply to simulate water quality indicators in a water supply network. In the practical part of the work, a hydraulic model of a water distribution system with a total length of 302,1 km was constructed. Measurement campaign was carried out to calibrate and verify created hydraulic model. Using this hydraulic model, water age for existing and possible scenarios was simulated. The results of the work have revealed parts of the water supply network containing high water age and are intended to encourage the progressive water distribution systems management philosophy.
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Zdravotně technické a plynovodní instalace v aparthotelu / Sanitation installation and gas installation in the aparthotelRůžička, Pavel Unknown Date (has links)
The master thesis focuses on the design of sanitary and gas installations in the particular aparthotel building in Pec pod Sněžkou. It is an aparthotel with two underground and max six above-ground floors incl. a gallery. The upper floors of the towers are used for accommodation. A parking lot and wellness area are situated on the first underground floor. On the second underground floor there is a technical background of the building, shops and a small restaurant for guests. All the roofs and terraces of the aparthotel are made to be green. The calculation part and the project contain the design of the sewerage, water supply, gas pipeline and their connection to the existing engineering networks. The theoretical part deals with increasing the pressure in the indoor plumbing, incl. design of equipment for increasing the pressure in the particular building.
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