Spis treści
Gotowa bibliografia na temat „Dagvatten”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Zobacz listy aktualnych artykułów, książek, rozpraw, streszczeń i innych źródeł naukowych na temat „Dagvatten”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Rozprawy doktorskie na temat "Dagvatten"
Hagelin, Robert, i Steve Mbanzabugabo. "Fördröjning av dagvatten". Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174359.
Pełny tekst źródłaThe increased amount of impermeable surfaces in the cities creates a larger and faster runoff of rainwater into the drainage systems. Some of today's existing pipelines are not able to handle this increased amount of storm water. A quick and short term solution to solve this problem is to construct delaying reservoirs that unburden the drainage system. Up to this point, not enough studies have been conducted on the different effects that a placement of a reservoir brings to a drainage system. If incorrectly positioned, a reservoir built for delaying the flow of storm water from a section of a drainage system can, have a negative effect on the flow further down the system. This flow regulation can be harmful to the system when the delayed flow from the section can interact with the flood peak from another section and can cause flooding. The purpose of this report was to study if different placements of a reservoir had any effect on the flow in a storm water drainage system. The aim was to find places where a reservoir could be positioned to prevent the collaboration of peak flows. This thesis was mainly conducted with the use of the hydraulic modeling program MIKE URBAN in which studies of two models are the bases of the results presented in this report. The results from the two models show that the placement of a reservoir in a drainage system has a large sway on how to avoid flooding. The least amount of floods was attained when the reservoir was placed in certain key positions in the drainage system. More time and resources should be devoted to further investigate the effect of a reservoir’s position and dimensions before being placed into a drainage system. This way, expenditures could be reduced and simultaneously future flooding avoided.
Nielsen, Linn, i Anja Ovik. "Dagvatten : Vem har ansvaret?" Thesis, Högskolan Väst, Avdelningen för Matematik, Data- och Lantmäteriteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-12784.
Pełny tekst źródłaToday's climate change means warmer temperatures and annual precipitation is expected to increase by 20-60 %. The increased rainfall means more stormwater on the ground. This water must be taken care of in a long-term sustainable manner, otherwise it can lead to problems. Therefore, society must adapt to the climate change that occurs. The study aims at investigating who is responsible for handling the water and clarifying the legal conditions for local stormwater treatment. The study also examines how water management looks like in the detailed plans in Västra Götaland County. The study focuses on looking at and how responsibility for stormwater is distributed in the detailed plan documents as well as the planning rules that are used for water treatment. The method we used is a combination of a qualitative and quantitative as well as a legal method.The study answers the following questions: o Who is responsible for the disposal of stormwater? o How does the municipalities distribute the responsibility of stormwater in the detailed plans? o Are there any plans for regulation of stormwater, which? o What is the distribution of responsibility in the plan descriptions? o Do municipalities have a legal basis for the use of local stormwater treatment, how do legal conditions look? The study results show that 28 % of municipal plans for stormwater are about local stormwater treatment, which is an illegal plan. Local stormwater treatment does not have the support from Chapter 4 Planning and Building Act required for a plan regulation to be used. The conclusion is that the municipalities should take responsibility for the discharge of stromwater if it is within the municipality's area of activity. Nevertheless, only in 16 % of the plans that the real estates are connected to the stormwater network.
Henriksson, Linnea. "Renare dagvatten från kvarteret Brännugnen". Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-205850.
Pełny tekst źródłaStormwater is rain and snow melt that runs off from hard surfaces. Stormwater is often polluted with heavy metals and organic pollutants, which can cause great damage if the water is not treated before it reaches the recipient. There are no national guidelines for threshold values of pollutants in stormwater. The stormwater group at Vattenfall AB Heat Uppsala and the environmental department at Uppsala municipality have together established threshold values for pollutants in the stormwater from the area Brännugnen, which is the name of the investigated area. Vattenfall has difficulties to keep the concentration of pollutants in the stormwater below the threshold values. To reduce the content of contaminants in the stormwater from the area Brännugnen this study was therefore carried out. Through site investigations and sampling of stormwater in six measuring points, sources of the contaminants were identified. Through literature studies, site investigations and discussions with experienced personnel, propositions of actions to avoid contamination of the stormwater have been developed. The stormwater study has also led to suggestion of an improved sampling strategy which better represents the amount of contaminants in the stormwater and is more cost-effective. The study included an investigation with the purpose to find out if the magazine that the stormwater from half of the area runs to have the capacity to reduce the contaminants. The results showed no reduction of contaminants. The reason is that the residence time is too short for the particles to have time to settle. In the study the contribution from condensate to the total amount of emitted metals in the stormwater was investigated. The condensate passes a treatment plant for purification before being discharged to the stormwater pipes. The result shows that the condensate has a large impact on the amount of emitted metals per year. Threshold values and standard values for stormwater was also studied, the conclusion is that the threshold values for the stormwater from the area Brännugnen are low. Both standard values for stormwater from thermal power stations and roads are higher than the threshold values. The results from the analyses of stormwater from the road outside the area Brännugnen also show higher concentrations of metals than the threshold values. Finally the stormwater study resulted in suggestions of technical solutions for future treatment of the stormwater from the area Brännugnen. An underground sedimentation magazine and a filter system are two treatment processes that can be used for removal of pollutants in the stormwater from the area Brännugnen.
Ernberg, Jesper. "Jämförelse av fördröjningsmagasin för dagvatten". Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-112362.
Pełny tekst źródłaThis report has been conducted as a thesis to finish my studies to become an engineer at Umeå University. The report presents the results of a comparative study of delay tray for stormwater. Advantages and disadvantages will be highlighted to make it easier to know which type of delay tray that should be used. Quotes have been collected from dealers, contractors and former projects. Information has been gathered from reports, retailers and discussions with industry professionals. Different locations and soil types require different delay solutions for stormwater. Although the differences between the prices are huge, you can rarely choose the cheapest one. The conditions sort out the best solution and the price will suffer. Open stormwater solutions like delay trenches are clearly the cheapest but it also takes up a lot valuable surface that cannot be used for anything else. Plastic pipes magazine and concrete pipe magazine is functioning alternative with its pros and cons. Stormwater attenuation systems are an interesting option that cannot always be used. The report can be used as a basis for selection of delay tray for stormwater.
Trinh, Yvonne. "Förekomst av mikroplast i dagvatten : En jämförande studie av dagvatten från vägtrafik och konstgräs i Uppsala". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-392093.
Pełny tekst źródłaMaterials made from plastic are practical and durable, therefore plastic is found in many every day products. Because of the properties of plastics, the manufacturing of products and usage of the material has increased consequently leading to the creations of microplastics in varying sizes. The definition of microplastics is plastic materials with a size smaller than 5 millimeters. Because of a huge prevalence in products the consequence is microplastics being found on many places in nature around the world. The Swedish Environmental Research Institute, IVL, has been assigned by the Swedish Environmental Protection Agency to review identified origins and the pathways of microplastics in Sweden. According to the study the largest source of microplastics from outdoor activities on land is from road wear and the abrasion of tyres followed by artificial turfs. Since microplastics are presumed to be spread to the environment, it is of concern to investigate potential microplastic load in storm water from these sources. The investigation of microplastic amounts has been studied in sizes ≥100 micrometres in storm water from the traffic road Bolandsgatan and the artificial turf Stenhagens IP in Uppsala. Samples were collected, using random sampling and with an automatic sampler enabling flow proportional sampling. Filtration of collected water samples were carried out followed by analysing microplastic visually in a stereo microscope. The analyses of microplastics were also combined with a melting test. In the study of the traffic road Bolandsgatan 98 % of all particles were black colored. The black colored particles were identified as microplastic originated from road wear. When studying the artificial turf Stenhagens IP a grass fragment was identified as microplastic originated from the artifical turf. Microplastic amounts from the traffic road Bolandsgatan are 33 kg/year. The emission factor for mixed fleet is 2.2∙10-5 kg/vehicle km. An emission factor for microplastic from road traffic has not been presented in other studies before. The amount of microplastics from road traffic in Uppsala was estimated to 27 000 kg/year and in Sweden to 1.5∙106 kg/year. From the artificial turf Stenhagens IP the amount was 6.3∙10-2 kg/year. By upscaling the amounts of microplastics from artificial turfs in Uppsala and Sweden the amounts were estimated to 0.56 and 48 kg/year, respectively. According to this study, the spread of microplastic from road traffic in Sweden is 5 times less than the estimated value and the amount from artificial turfs is 30-50 times less compared to the investigation by the Swedish Environmental Protection Agency.
Levander, Ellinor. "Dagvatten i Vegastaden : Stormwater in Vegastaden". Thesis, KTH, Centrum för hälsa och byggande, CHB, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-40903.
Pełny tekst źródłaAbstractThis thesis was carried out at the Environment- and town planning department in the municipality of Haninge and is an inquiry of how stormwater in the planned quarter, Vegastaden, can be managed. Vegastaden will involve 3000 new dwellings, a new commuter train station and a new connection with road 73. Drevviken, which is the recipient of stormwater in the neighbourhood of Vega, is overloaded with stormwater so the focus in this thesis is on local management of stormwater. Ponds, slow off leading, wet lands, green roofs, infiltration and filter strips are discussed in the thesis which even contains calculations of water run off, investigation of infiltration- and filter strips possibilities, slow off leading and dimensioning of swales and ponds. The thesis will give an apprehension of how large volume of the stormwater that can be handled through local handling of stormwater and give an idea of how large areas that will be needed for retardation and treatments in ponds. The stormwater strategy of Haninge was accepted in the municipal council in April 2005 and has influenced the model of this thesis. The area where Vegastaden will be built is very hilly and has varying ground capacity. Some areas have varying infiltration possibilities and consists of moraine and flat rocks, other areas consists of seal earth-layers of clay with minimal permeability. During 1999 and 2000 an ecocycle society service construction, Green Zone was built in Umeå which possibly can give inspiration in how to manage the storm water in Vegastaden. All the buildings were designed with green roofs which reduce run off from the roofs with 50 %. The computer program Storm Tac has been used for run off calculations and dimensioning of ponds and swales. Different scenes are introduced where it shows how much of the run off that can be reduced through different measures. When no measures are taken the run off is calculated to ca 195 506 m 3/year and with great measures in form of green roofs and filter strips the run off is calculated to ca 88 137 m 3/year. To manage the stormwater that has to be led off on account of no evaporation or infiltration ponds have been dimensioned. Depending on the measures taken to reduce the run off, the size of the ponds will vary between ca 800 m 2and 3700 m2. Filter strips should be placed where they do the greatest good and green roofs where the infiltration in the ground is the worst. If there is no way today to decide how much of the storm water that should be managed locally the conditions for such a management in the future should be favoured through for example green roof friendly roof constructions and to minimize the non-permeable surfaces. Because of the high ground water in the area a swale is hardly a good alternative when leading off storm water, but a stormwater canal of concrete should be able to lead off stormwater. The area should manage with only one pond regarding run off and treatment and is suitably placed east of the railway where the lowest parts are.
Albertsen, Henrik, i Amanda Lindberg. "Lokalt omhändertagande av dagvatten på bostadsfastigheter". Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-53587.
Pełny tekst źródłaJosic, Elma. "Provtagningsmetoder för mikroplaster i dagvatten och sediment". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255616.
Pełny tekst źródłaPlastics have created the conditions for us people for decades because of its wide use. It has, however, resulted that there are amounts of microplastics in the environment and it is today an environmental problem that needs to be fixed. It is a challenge to clarify the origin of the microplastics, but it can be stated that artificial turf is one of the largest sources in Sweden and is expected to release several tonnes of microplastics. To find out how much microplastics an artificial turf can spread with stormwater, various samples are taken in eg. water and sediment environments. The purpose of this thesis was to present various sampling methods that can be used when sampling microplastics from artificial turf in water and sediment. Then, the results can be used as a basis for adapting future samples for microplastics in water and sediment. The following three goals were therefore set up; identify different sampling methods suitable for microplastics, compare these with each other and suggest appropriate sampling methods for microplastics from artificial turf in mainly water. For successful sampling, planning and preparation are required before the execution. This means that a concept model should be developed over how the soccer field is designed, where and when samplings should be performed, which parameters should be analyzed and that there are references for background contents, see figure 3, page 16. Information about the sampling location needs to be compiled, for example, which plastic materials are present in the artificial turf and which expected primary and secondary microplastics can be spread from the soccerfield. During this thesis, two sampling alternatives were identified to investigate microplastics in water samples: • Sampling of water (active sampling) for microplastic analysis • Sampling of filtrate (passive sampling) where microplastic is filtered. In this case, the microplastics that have been captured by the filter are analyzed. This thesis also deals with other samplings - sampling with pump, water-container and dredge. It is because to see which alternatives are available for water and sediment sampling and for obtaining a comparison between these samples. At sampling, there is currently no common standard for implementation, which would probably have facilitated the sampling work. Especially when the results were easier to compare with each other. A study visit was made at Bergavik's IP in Kalmar to perform sampling in three wells and in a nearby stormwater pond to drain the surface and drainage water from the artificial turf. The sampling began with the stormwater flow and the amount of rainfall during the previous days before the measurement was noted. All sampling occasions occur at similar weather and flow conditions. The water samples were then sent for analysis. This method can be repeated and after a few sampling occasions, a mean value of microplastic content can be obtained. The thesis conclusion is that it is important to look at how and where the sampling is performed. Both when it comes to active sampling and passive sampling, it is necessary to take samples taken on several occasions, describe the precipitation conditions before sampling, take samples at the same place and the same depth in order to more easily identify the amount of microplastics from the source and how much is then disseminated. The reason why it is today mainly active and passive sampling that is used in sampling microplastics from artificial turf is that these are proven methods. A suggestion for future studies is to identify a common standard for execution. It would facilitate analyzes of microplastic spread from artificial turf if the same standard was used everywhere.
Hansson, Tomas, i Erik Skoglund. "Arbetsrutiner för dagvatten i Gävle kommun : Förbättringsförslag". Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-21992.
Pełny tekst źródłaDet visade sig i en förstudie av rapportförfattarna att dagvattenhanteringen i Gävle kommun har brister som kan resultera i att dagvattenhanteringen inte blir lika effektivt som den skulle kunna vara. Syftet med projektet var att ta fram ett antal förbättringsförslag för att i längden hjälpa Gävle kommun att få ett bättre dagvattenarbete. Ett mål var att samla in data från aktörer för att se var de ansåg att det fanns förbättringsmöjlighet. Genom att genomföra en litteraturstudie, en jämförelse mellan några kommuners dagvattenpolicy och en enkätundersökning var tanken att eventuellt identifiera ytterligare förbättringsmöjligheter i dagvattenarbetet i Gävle kommun. Resultatet att det finns förbättringsmöjligheter gällande kommunikation, informering, rapportering och finansieringsansvar. Författarna har givit några förbättringsförslag bl.a. att tydliggöra finansieringen, sammanställa en kontaktlista, presentera sitt dagvattenarbete i miljörapporter och sätta ett gemensamt mål för dagvatten. Resultatet från detta projekt och från förstudien visar att det finns förbättringspotential för dagvattenarbetet i kommunen. Om förbättringsförslagen skulle tas i åtanke skulle Gävle kommun kunna komma närmare sin vision, att bli en av de bästa miljökommunerna i Sverige.
Fjordefalk, Vera. "Reningsmetoder för dagvatten innehållande mikroplaster från konstgräsplaner". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240310.
Pełny tekst źródłaThe number of artificial turfs in Sweden has increased significantly since the year 2000. Today there are about 1255 outdoor pitches made from artificial turf and the annual increase is estimated at 100 pitches. Artificial turfs provide many benefits for sporting activities such as longer game seasons and more playing hours. To gain characteristics as close to natural turfs as possible, infill is used on top of the artificial grass. The infill is usually made out of styrene-butadien rubber (SBR), ethylene-propylene-diene-monomer-rubber (EPDM) or thermoplastic estalomer (TPE). However, there is also organic alternativs made from cork or coconut. Since the filling materials mostly consist of plastic polymers, some environmental concerns have been raised in the connection of the use of infill. The manufacturing size of infill is between 2-3 mm and is thereby classified as primary microplastics. The Swedish Environment Institute performed a study to map the sources of microplastic emissions to the marine environment. The study concluded that artificial turfs was the second largest land-based source of microplastic emission. The conclusion was based on the suggested annual amount for refill of infill for a full-size pitch. The amount of microplastics ending up in the sea, lakes and streams was not answered in the study, as it would require a more extensive mapping of routes. Former studies have shown that a certain amount of infill ends up in the stormwater wells which is placed around the turfs to prevent water collection. In order to prevent continued spreading via stormwater wells out to marine environments, treatment methods for stormwater runoff from artificial turfs has been requested.The objective of this study is to identify suitable methods for treatment of stormwater containing microplastics from artificial turfs. To find out what methods are used today, four manufacturers of granulate traps and filters were contacted. The municipalities that have installed or planned to install any of the stormwater treatment methods was also contacted to get an understanding of how these methods works in practice. From the study it is apparent that the development of treatment methods mentioned is in an early stage where efficiency is not tested for any of the methods. In order to determine what a suitable stormwater treatment method is in this case, further studies on how water flows vary between different pitch designs and surrounding surfaces are required. In this study the amount of microplastics found in the stormwater wells is solely based on ocular inspection and often described as "small" by the interviewees. To determine the exact amount of microplastics that can occur in stormwater wells, it would be necessary to weigh the microplastics found in the wells on every single plant. Because of differences in maintenance routines and depending on the existence of available surfaces for storage of snow and infill, the amount of microplastics found in the wells varies. The size of microplastics found was estimated to be of manufacturing size (2-3 mm). However, microplastics can become very small, down to 1 μm and hard to see with the naked eye. Further studies are recommended to set up a grain size distribution curve which can be used to manufacture the mesh in a reasonable size. The small sizes of microplastics makes it unreasonable to expect a purification degree f 100%, the mesh size would make it impossible for water to flow through. This calls for establishing guidance values for microplastics in stormwater. In order to establish guidance values and carry out necessary studies to develope the existing methods, a better cooperation between institution and trade and industry is needed. A method can be considered to be suitable for microplastics if the largest percentage part by weight of microplastics is caught. The suitability of the current methods cannot be judged until this is determined.