National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Using Artificial Neural Network Models to Assess Water Quality in Water Distribution Networks
Cuesta Cordoba, Gustavo Andres ; Tuhovčák, Ladislav (advisor)
A water distribution system (WDS) is based in a network of interconnected hydraulic components to transport the water directly to the customers. Water must be treated in a Water Treatment Plant (WTP) to provide safe drinking water to consumers, free from pathogenic and other undesirable organisms. The disinfection is an important aspect in achieving safe drinking water and preventing the spread of waterborne diseases. Chlorine is the most commonly used disinfectant in conventional water treatment processes because of its low cost, its capacity to deactivate bacteria, and because it ensures residual concentrations in WDS to prevent microbiological contamination. Chlorine residual concentration is affected by a phenomenon known as chlorine decay, which means that chlorine reacts with other components along the system and its concentration decrease. Chlorine is measured at the output of the WTP and also in several considered points within the WDS to control the water quality in the system. Simulation and modeling methods help to predict in an effective way the chlorine concentration in the WDS. The purpose of the thesis is to assess chlorine concentration in some strategic points within the WDS by using the historical measured data of some water quality parameters that influence chlorine decay. Recent investigations of the water quality have shown the need of the use of non-linear modeling for chlorine decay prediction. Chlorine decay in a pipeline is a complex phenomenon so it requires techniques that can provide reliable and efficient representation of the complexity of this behavior. Statistical models based on Artificial Neural Networks (ANN) have been found appropriated for the investigation and solution of problems related with non-linearity in the chlorine decay prediction offering advantages over more conventional modeling techniques. In this sense, this thesis uses a specific neural network application to solve the problem of forecasting the residual chlorine
Long term planning of water distribution network rehabilitation
Hos, Lukáš ; Kučera, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
This diploma thesis is about long-term rehabilitation planning of water distribution system. First part is about legislative demands on rehabilitation planning in Czech Republic and about methods used abroad to do long-term reahabilitation planning. Second part of thesis is about own created method based on TEA Water (application about condtition assessment of water supply infrastructure). This method is tested on fictional water network and on real water network of Babice nad Svitavou.
Impact of pressure condition on water consuption in water distribution network
Straňák, Petr ; Sucháček, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
The diploma thesis deals with effect of pressure conditions in the water supply network on consumption of drinking water. The introductory part describes how pressures affect water consumption and six studies from different countries carried out on real network are presented. Further, the work is devoted to other factors influencing water consumption and distribution of domestic water consumption. The practical part deals with the laboratory measurement of the influence of pressure change on tested discharge fittings for flowing and dripping water. The results are also expressed in annual costs and a method is presented how the effect of pressure change can be quantified if we know the average daily consumption and its distribution.
Multi-objective condition assessment of selected parts of water distribution systems
Tauš, Miloslav ; Svoboda,, Miroslav (referee) ; Kriš,, Jozef (referee) ; Tuhovčák, Ladislav (advisor)
The topic of the thesis is multi objective condition assessment of water supply systems. The state of the art of condition assessment of water supply systems and the state of the art of multi objective optimization methods are presented within the thesis. Based on these recherches, the uniform methodology of condition assessment of water supply systems and its 7 modules was designed. The thesis deals with the selected modules to condition assessment of water pumping stations, water networks and pipe sections. The output of the methodology is the assignment of a category of the technical condition to the rated object. The proposed methodology was tested on real water facilities and proves the ability of a fair presentation of the technical condition of the object.
Benchmarking of Water Utilities in Czech Republic
Hájek, Břetislav ; Sucháček, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
This Bachelor thesis is focused on knowledge of benchmarking of water companies with performance indicators. The main task is to to gather basic and complementrary indicators into the Excel table, which calculates performance indicators. All indicators are then rewritten into the WaBe web application. Data are collected from the company’s annual reports, which are downloadable on the website of the Ministry of Justice www.justice.org, where companies are required to submit their annual reports. The first part of the bachelor thesis is a description of benchmarking and the companies that do it in water industry as foreign companies (IWA, EBC, IBNET, EurEau, AWWA, WRF) as well as the czech organizations (SOVAK, Ministry of Agriculture, WaBe). In the second part is the presentation and analysis of selected water companies. For the selected indicatorsis made comparsion with graphs created in Excel.
Analysis of Water Consupmtion in Campus of FAST VUT Brno
Fogl, Jiří ; Menšík, Miroslav (referee) ; Tuhovčák, Ladislav (advisor)
The subject of the diploma thesis is the analysis of water consumption in the area of the Faculty of Civil Engineering, Brno University of Technology. The main part of the thesis deals with the analysis of the measured data, which are recorded using a data logger located on the VF2 billing water meter. The processing of consumption curves is focused on individual working days, for days with or without instruction. From the results of the individual analyzes, maximum hourly limits are set for signaling of undesirable sampling states. In the end, the Smart Water Meters principle is introduced in the Czech Republic and abroad and a technical solution for the replacement of all billing water meters in the FAST area with new smart meters has been made.
Performance indicators of selected water utilities in Czech Republic
Vaculík, Tomáš ; Sucháček, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
This Bachelor thesis id focused on comparative analysis performance indicators of chosen water companies in the Czech Republic. The first task of this assignment was collecting and processing of basic and supplemented indicators of chosen water companies. These indicators were recorded to the file created in excel. All data of all companies are freely available on the internet page: www.justice.org, where these companies are required to post their annual reports. In the first part of this bachelor thesis, organizations are described, companies and applications dealing with the issue of comparative analysis in the water companies. Representatives are elected from the foreign sector (IWA, IBNET, EurEau, EBC), as well as from the home sector (SOVAK, Metodika MZe, WaBe). The second part of this thesis begin with presentation of all companies, which is provided with comparative analysis. Analysis were from the biggest part processed by the application WaBe. For the better overview of this work, graphs made in application excel were added to this analysis.
Technical Assessment of Water Supply Infrastructure
Hos, Lukáš ; Kučera, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
This bachelor‘s thesis is about condition assessment of water supply infrastructure. First part is about legislative demands on condition assessment and about methods used abroad to asses water supply infrastructure. Second part of this thesis is about application TEA Water. It is described how it works and it is used to condition assessment of fictional water supply infrastructure and choosen objects of real water supply infrastructure.
Optimisation of Pressure Condition in water Distribution Networks
Straňák, Petr ; Sucháček, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
The bachelor thesis deals with pressure in the water distribution network. The introductory chapter describes legislative requirements for network pressures and means of network auditing. The following chapter deals with the optimization of pressure conditions in the water distribution network, describes the positive and negative aspects of pressure optimization, illustrates ways of influencing pressures, and briefly analyzes existing case studies from abroad. In the final chapter, with the help of the EPANET 2.0 program, pressure optimization is performed on the fictional network.
Analysis of Water Consumption
Pokorná, Denisa ; Ručka, Jan (referee) ; Tuhovčák, Ladislav (advisor)
The subject of the bachelor thesis is the processing of water consumption analysis in the area of building faculty. The bulk of the work is devoted to the evaluation of the data obtained by the smart metering system, which is currently only installed on the billing water meter number 2 located on Veveří Street. The Faculty of Civil Engineering is very interested in new trends and possibilities to more effectively measure water consumption. The conclusion of the thesis deals with the appropriate design of the alarm values of consumption and the possible counting of other water meters in the area and associated faster and more transparent information about the water consumption values. An integral part of the work and water consumption are general information on the need for water for which there are no up-to-date comprehensive methodologies to accurately determine it. Analyzing already measured data seems to be the most accurate way of determining it. Part of the thesis is also a chapter focused on the development of water consumption in our country as well as in comparison with abroad. At present, there is a decreasing trend in water needs that began in the 1990s.

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