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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
641

Návrh vodohospodářských opatření v katastrálním území / Proposal of Water Management Measures in the Cadastral Area

Prokop, Pavel January 2019 (has links)
This diploma thesis is divided into two main parts. The first part describes issues of the proposal of water management measures in land consolidation process. Second part deals with the conceptual proposal of water management measures in the specific cadastral area. This part also include graphic attachments.
642

Vodohospodářské řešení zásobního objemu nádrže Vranov / Water Management Analysis of Storage Capacity of the Vranov Reservoir

Vítková, Lucie January 2020 (has links)
The current persistent drought and changes in the climate system have raised water managers expert questions about how to manage water resources in the future. The manifestation of climate change in hydrological series and their influence on the magnitude of threats to the storage functions of reservoirs are more often investigated. Already today, long-term shortages of storage capacity in reservoirs lead to the introduction of special manipulations on water structures. The aim of the thesis is to perform the analysis of time series, respectively decomposition of hydrological series average annual and monthly discharges. Create extended hydrological bases using synthetic discharge series generators and develop a comprehensive analysis of storage volume without considering losses even with the introduction of losses from the water surface vapor in the UNCE RESERVOIR program. The created discharge series are compared and evaluated on the basis of statistical characteristics and reservoir storages results with the real discharge series. The practical app is conducted on the Vranov reservoir in the Dyje River Basin.
643

Analýza stavu potrubí odvodnění parní turbíny K 220-44 a návrh korektivních opatření / Analysis of the condition of the K 220-44 steam turbine drainage pipeline and proposal of corrective measures

Horký, Jiljí January 2021 (has links)
This diploma thesis deals with the analysis of the drainage pipeline of the Škoda K 220-44 steam turbine. This turbine is operated in Dukovany Nuclear Power Plant. One part of this work is proposal of corrective measures. The aims of this work include the creation of a search for drainage, steam, erosion corrosion and mapping of defects in long-term operated drainage system. Work also includes the evaluation of measured values of the pipe wall thickness measured by ultrasonic analyzer. In addition, the work contains images created from 3D model, on which the location of defects and measurements are displayed.
644

Metody rozpočtování inženýrských a vodohospodářských staveb / Methods of estimating costs for engineering and water management structures

Ovečková, Lenka January 2013 (has links)
Main intention of the thesis is to name and explain budgeting methods of building constructions with main focus on creating budget for water management and engineering structures. The practical part presents itemized budgets for a wastewater treatment plant and a bicycle trail. After that the price determined of the itemized budget is compared to the price determined by budget indicator.
645

Hybrid patches of commoning - Unpacking influences of the hydrosocial cycle on commoning in a downstream desert reclamation area : case study in Youssef El Seddik, Egypt / Hybrida utrymmen av kollektivt samarbete - Analys av influenser från den hydrosociala cykeln på kollektiva handlingar i ett nedströms nyodlat ökenområde : fallstudie i Youssef El Seddik, Egypten

Hellström, Benjamin, Sultan, Leila January 2020 (has links)
Water stress is increasing globally, especially affecting arid regions of the world such as Egypt. Due to challenges related to intensifying effects of climate change and a rapidly growing population, the levels of and access to water is a continuous area of concern for the country – making it important to analyze how these water issues are managed. This study connects the hydrosocial cycle and commoning frameworks in analyzing how water is managed in a downstream, desert reclamation area in Fayoum, Egypt – and how this management, or lack thereof, affects the livelihoods of the people living there. In doing so, we examine how possible commoning practices are influenced by factors related to the hydrosocial cycle. Fieldwork has been conducted for this case study by holding participatory workshops, semi-structured interviews, and observations. Our findings imply that the hydrosocial cycle has shaped the management of water in our studied site, which has in turn affected the commoning practices that take place there. The low water levels and the saline quality of the water is what has created the prevalent forms of commoning that can be seen in the community.  The presence of a local agricultural association has also influenced the commoning practices. The quality and levels of water in the area are in part managed by neighbors borrowing irrigation minutes from each other, and by collective olive harvest. To a lesser extent there are also instances of neighbors helping each other with agricultural work throughout the year, and sharing reservoirs. There are indications that these commoning practices play a part in sustaining livelihoods in the community. The commoning practices found in the studied site have emerged in a relatively new social context and can be characterized as context specific patches of commoning, occurring on the peripheries of hybrid institutions – that have largely been shaped by hydrosocial forces. As the hydrosocial cycle is ever-changing, these commoning practices will likely also come to change.
646

Accès social à l'eau : étude de cas dans un village mossi du Yatenga

Veuille, Sabine 08 1900 (has links)
No description available.
647

Sistema de aprovechamiento pluvial y usos de paneles fotovoltaicos para optimizar el consumo de agua potable y energía eléctrica en el IESTP Suiza en Pucallpa / Rainwater harvesting system and uses of photovoltaic panels to optimize the consumption of drinking water and electricity at the Swiss IESTP in Pucallpa

Cavalcanti Linares, Carlos Eduardo, Huaypuma Pari, Eliseo Javier 20 January 2022 (has links)
El agua, en todos sus estados, sigue siendo un recurso clave para la supervivencia de todas las especies de nuestro planeta, cumpliendo el llamado ciclo del agua. Sin embargo, la estabilidad de este ciclo se ve amenazada por los efectos del cambio climático inducido por el hombre. Para contrarrestar sus impactos negativos, se han llevado a cabo diversos proyectos de investigación para encontrar soluciones a problemas específicos de gestión del agua. Otro elemento importante para el desarrollo de la humanidad es la energía eléctrica, ya que posibilita el cumplimiento de las actividades cotidianas relacionadas con la educación, la salud y el comercio; por ello, la búsqueda de alternativas energéticas no tradicionales para el suministro eléctrico brinda oportunidades que mejoran la calidad de vida de las personas, transformando la economía y mitigando los efectos del cambio climático. Esta investigación tiene como objetivo determinar cómo aprovechar el agua de lluvia como recurso natural y cómo, mediante el uso de paneles fotovoltaicos, se puede ahorrar energía eléctrica de manera sostenible. Los datos y resultados identificados indican que la captación de agua de lluvia es una opción viable, pero requiere una inversión inicial de S/. 58.873,34 con un plazo de recuperación de diecisiete años. Además, también es favorable la instalación de paneles fotovoltaicos para reducir el consumo eléctrico con una inversión de S/. 102.553,39 con un plazo de recuperación de dos años. / Water, in all its states, remains a key resource for the survival of all species on our planet, fulfilling the so-called water cycle. However, the stability of this cycle is threatened by the effects of human-induced climate change. To counteract its negative impacts, various research projects have been carried out to find solutions to specific water management problems. Another important element for the development of humanity is electric power, since it enables the fulfillment of daily activities related to education, health and commerce; therefore, the search for non-traditional energy alternatives for electricity supply provides opportunities that improve people's quality of life, transforming the economy and mitigating the effects of climate change. This research aims to determine how to take advantage of rainwater as a natural resource and how, through the use of photovoltaic panels, electrical energy can be saved in a sustainable manner. The data and results identified indicate that rainwater harvesting is a viable option, but it requires an initial investment of S/. 58,873.34 with a payback period of seventeen years. In addition, the installation of photovoltaic panels to reduce electricity consumption is also favorable with an investment of S/. 102,553.39 with a payback period of two years. / Tesis
648

Vodohospodářské řešení vodní nádrže Tršice / Water management solution of Tršice reservoir

Chyba, Martin Unknown Date (has links)
The master thesis follows the bachelor's thesis entitled Water management solution of a small water Tršice reservoir. The object of the work is the completion of the water management solution at the Tršice reservoir. In the terms of the storage function of the reservoir, it will be a question of finding a possible increase of runoff for irrigation in the growing season of various crops. In the terms of the protective function, it will be a transformation of flood waves of Tršice reservoirs and below ponds.
649

Skånska vattenråds bidrag till att uppnå EU:s vattendirektivs mål om god vattenstatus : En kvalitativ studie av vattenråds organisationsstruktur och prioriteringar i Skåne / The Contributions of Water Councils in Scania to Achieve the Aim of the EU Water Framework Directive Regarding Good Water Status : A qualitative study of the organizational structure and prioritizations of water councils in Scania

Tangvald, Nils January 2023 (has links)
Vattenförvaltning inom EU har, enligt EU:s vattendirektiv, som mål att samtliga vattenförekomster ska uppnå god status senast 2027. Sverige är ett av de EU-länder där målet ej har uppnåtts med uppmätt icke-tillfredsställande status i en del vattenförekomster i exempelvis Skåne; en situation som inte beräknas förbättras inom tidsfristen. I Sverige styrs vattenförvaltning lokalt med kommuner och myndigheter som beslutsfattande organ i enlighet med vattenmyndighetens sexårsplan. EU:s vattendirektiv kräver inkludering av intressenter och allmänheten i förvaltningen, vilket har lett till bildandet av vattenorganisationer såsom vattenråd. Dessa har till uppgift att verka som lokalkunskap för särskilda avrinningsområden, där ett nätverk av aktörer bildas för att möjliggöra påverkan av inriktning i vattenförvaltningen. Forskning visar på samarbetsproblematik mellan aktörer i vattenråd, brist på kunskap och intresse bland allmänheten och intressenter samt fall där ekonomiska och sociala mål har prioriterats före ekologiska, vilket har försvårat implementeringen av EU:s vattendirektiv. Syftet med studien är att undersöka hur skånska vattenråd utifrån nuvarande organisationsstruktur och prioriteringar kan bidra mer i arbetet för målet om god vattenstatus enligt EU:s vattendirektiv. Studien utgick från ett strategiskt urval och semistrukturerad intervju-metodik eller fokusgrupper bestående av intervjupersoner med hög expertis. Resultatet analyserades med hjälp av följande teorier: Environmental governance, vattenförvaltning, flernivåstyre, politisk samstämmighet, social inlärningsteori samt reflektiv och reflexiv kommunikation. Studiens resultat visar att de undersökta skånska vattenråden gör vad de kan för att bidra utifrån nuvarande förutsättningar, men att finansieringsbegränsningar, extern påverkan av andra aktörer i avrinningsområdena och brist på samarbete mellan olika nivåer i vattenförvaltningen förhindrar mångas utveckling. Organisatoriskt och prioriteringsmässigt fungerar majoriteten av de undersökta vattenråden väl och visar god potential, men förbättring inom det ovannämnda hade behövts om ett närmande av EU:s vattendirektivs mål skall uppnås i lokala skånska vattenförekomster. / Water management within the EU, according to the EU Water Framework Directive (WFD), has the aim to achieve good water status in all water bodies no later than 2027. Sweden is one EU country where the aim has not been reached, with measured non-satisfactory status in numerous water bodies in Scania for example; a situation not predicted to improve before the deadline. In Sweden, water management is governed locally with municipalities and agencies as decision-makers in accordance with the six-year plan of the water agency. Since the WFD requires stakeholder and public participation, the creation of water organisations such as water councils has been conducted. These act as local knowledge bodies in certain catchment basins, creating a network of actors to enable an influence on the orientation of water management. Research has shown collaboration issues between actors in water councils, a lack of knowledge and interest amongst the public and stakeholders, and cases where economic and social aims have preceded ecological ones. These factors in turn have aggravated the implementation of the WFD. The purpose of this study is to investigate how water councils of Scania, from current organizational structure and prioritizations, have the possibility to increase their contribution towards the aim of the WFD regarding good water status. The study was conducted from a strategic selection and semi-structured interviews or focus groups, including interviewees with high expertise. The result was analyzed using the following theories: Environmental governance, water governance, multi-level governance, policy coherence, social learning and reflective as well as reflexive communication. The results of the study demonstrate a situation where water councils contribute their utmost from current capabilities, yet are prevented to develop further due to financial limitations, external impacts from other actors in catchment basins, and a lack of collaboration between different levels of water management. From an organizational and prioritization point of view, the majority of investigated water councils work well and showcase high potential, with improvements of the aforementioned needed for the approach of the WFD’s aim in local water bodies of Scania.
650

Simulation strategies for improved contamination modeling of liquid dynamics on automotive surfaces

Sugathapala, Thisal Mandula, Bakker, Twan January 2022 (has links)
A significant level of research is currently being carried out in the development of driver support systems as they are expected to play a key role in minimizing road vehicle accidents and creating a safe driving environment under harsh weather conditions. However, the performance of some components used by existing driver support systems like LIDAR and visual cameras are affected by extreme weather conditions such as heavy rain fall and snow. Therefore, it is paramount to identify key locations in an automotive vehicle where such systems are least affect by external weather conditions, thereby, improving their overall performance. The field of research that deals with such questions from a simulation perspective is called contamination modeling. At the moment, one of the biggest knowledge gaps in this field is how to consider the effect of different materials on the movement of liquids such as water on different automotive surfaces like glass, plastic, rubber and painted metal. The work presented in this research study has been carried out to investigate and establish the most suitable simulation strategies to match numerical predictions with experimental data for flow of water over different automotive surfaces. Following a comprehensive parametric study of simulation parameters, it was found that the most suitable model that can be tweaked to achieve different flow properties with different surfaces is a dynamic contact angle model. The Blended Kistler model available in STAR-CCM+ required specific values for static, advancing and receding contact angles to optimize a surface for a given material. Therefore, droplet experiments of two droplet sizes were initially carried out for all tested materials at different inclinations and necessary flow parameters were recorded. All experiments were carried out using an approach known as light induced fluorescence imaging where the captured images provided a very convenient method for post processing in computational software. Results from droplet experiments showed that water moved quickest on plastic and slowest on glass. Static contact angle measurements were carried out first on horizontal surfaces. Afterwards, the surface was inclined at 15, 30, 45, 60, and 75 degrees to measure changes in contact angle and velocities. The surfaces for glass and painted metal were directly taken from the door of a Volvo S60 while a separate surface was used for plastic and rubber. These results were then used to create simulation setups for rivulets in STAR-CCM+ with the multiphase modeling approach known as volume of fluid. Rivulet simulations were carried out for all four materials at five different inclinations and the results were compared and validated with experimental data. The results show good correlation between numerical predictions for rivulet movement and experimental data emphasising on the possibility of fine-tuning the surfaces of a simulation setup to represent different material properties.

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