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763 Uppsatser om Soil carbon - Sida 48 av 51

Lokalt omhändertagande av dagvatten i Västerås - Möjligheter till ökad användning i befintliga innerstadsområden : Local disposal of storm water i Västerås - possibilities for increased use in downtown areas

The construction of buildings and paved surfaces changes the natural water balance.Precipitation generates surface runoff and storm water instead of infiltrating into the soil.Storm water has come to be considered as a major source of pollution in lakes and streams inthe vicinity of urban areas. Reduction of pollutants in storm water is a key action in order toprotect sensitive recipients and maintain high water quality. Storm water is traditionallytransported by storm sewers to the nearest recipient. In recent years the approach to stormwater management has changed; storm water should primarily be disposed of on site, throughlocal disposal of storm water, LOD. LOD is created by a combination of the function ofseveral smaller local facilities and the general sewer system.

Andlig växtodling, historiesyn och kunskapsteori - hur hänger dessa begrepp ihop? : en översikt av fyra odlingspraktikers ideologier.

Abstract Spiritual gardening, historical perspective and epistemology, - how do these concepts connect? A review of the ideologies of four pragmatic growers. The purpose of this thesis is: ? to present an alternative forthcoming perspective on knowledge, that may be of significance for future theories and knowledge about growing and gardening. ? to lift experiences with Nature Spirits into an academic context, that permits us a closer look at the phenomenon. ? to contribute to an academic platform connecting humanistic and natural sciences. The intention of this text is to bridge the differences between the strictly rational traditions of knowledge and those more experience based ones. The thesis wants to show that much can be won if feeling based and mental reflections once again are approached as equal sources of knowledge. The aim is to give an orientation about the subject of Nature Spirits. The interesting fact is not whether (that) one can talk to nature, but how one does it and that more can be understood about nature and the reality that the established sciences study. The form for this study of literature is a describing presentation; to put names on and give wording to the phenomena of Nature Spirits and Plantdevas. The sources of literature are four pragmatic practitioners of spiritual gardening who have written extensively about their own work.

Utveckling och tillämpning av en GIS-baserad hydrologisk modell

A distributed hydrological rainfall-runoff model has been developed using a GIS integrated with a dynamic programming module (PCRaster). The model has been developed within the framework of the EU-project TWINBAS at IVL Swedish Environmental Research Institute, and is intended for use in WATSHMAN ? a tool for watershed management developed at IVL. The model simulates runoff from a catchment based on daily mean values of temperature and precipitation. The GIS input data consist of maps with soil type, land-use, lakes, rivers and a digital elevation model.

Möjligheternas skolgård : om att skapa förutsättningar för en välanvänd utemiljö. Exempel från Luleå.

Children's need of a good environment of playing outdoor at schoolyards is, both from a perspective of commonly public's health and from the children themselves, indisputable. Children who have a good and varying playground develop physically, psychologically and socially. As an instrument of pedagogic a playground also is valuable for example in teaching the round, periodical successions and understanding of democratic processes. The conception playground means here in my work the environment outdoor for children at schools up to about twelve years old. What is a good playground then? How is it possible for a landscape architect to contribute improvements? The purpose of my work has been to enlarge my knowledge about playgrounds, understand more of the profession as a landscape architect and apply a perspective of children in the planning. To sum up, the shaping of playgrounds has great importance for the activities of the children and if the teachers make use of it, the teaching. A good playground gives the delight, the excitement and the curiosity free spaces and stimulates new challenges.

Tekniska möjligheter för artificiell spridning av renlav :

Forestry and reindeer husbandry are entitled to use the same land for their operations. For this reason, conflicts occasionally arise between them. Soil scarification is a forestry operation which has a negative effect on the occurrence of reindeer lichen. Reindeer lichens are of crucial importance to reindeers and reindeer husbandry, especially in the winter when reindeers primarily feed on different lichen species (Cladina spp. and Cetraria spp.).

Prästgårdsträdgårdar : barndomsskildringar från 14 prästgårdsträdgårdar i Växjö stift

Few rectory gardens are today remaining in their former design and the cultural heritage that they represent are disappearing. Since 1987-88 the parishes are no longer bound to keep housing for their priests, which means that they, for economical reasons, are starting to sell their rectories. With this in mind, a group of people, growing up in rectories in Småland and Öland between the 1930th and 1950th, formed an interest group to save the memory of their rectory gardens. On the basis of their memories, they have written a couple of descriptions of the rectories, which describe the gardens content, design and the life they once lived there. With this compilation of the 14 rectory gardens I want to keep the memory of them and create a ground for future work in this field. Historically the rectory gardens played an important roll as patterns and examples in the countryside.

Framtidens energieffektiva flerbostadshus

The housing sector of today represents for almost 40% of the energy consumption, an energy consumption of which the major part consists of non-renewable energy sources. This is not sustainable and utilization of new energy-efficient technologies in buildings can be a step in the right direction, towards a sustainable energy society.This report has been made on behalf of and in cooperation with Älvstranden Utveckling AB in Gothenburg to examine how future energy-efficient technologies can affect the energy demand in energy-efficient multi-dwelling buildings.The report is based on Älvstrandens passive house, Hamnhuset, a house whose energy consumption is far below the BBR's requirements. The report looks at the opportunities for improvement within windows, insulation, solar energy technologies, as well as white goods. Computer simulations are then made to apply the selected technologies into a reference building. Technologies are selected from an energy efficient perspective and no account has been taken of other aspects such as the economy.

Beräkning av miljömässiga och ekonomiska konsekvenser vid källsortering av blandat byggavfall : samt analys av redovisningsmetoder för byggavfallsstatistik

I en värld där människan är det enda djur som lämnar efter sig avfall som inte kan brytas ned naturligt, är det viktigt att avfallet vi producerar tas om hand på bästa möjliga sätt. EU har därför tagit fram en prioriteringsordning för hur avfallet ska behandlas. Denna kallas avfallshierarkin och ska ligga till grund för medlemsländernas lagstiftning om avfallshantering. I Sverige kallas byggsektorn för den ?40-procentiga sektorn? vilket syftar på att 40 procent av Sveriges avfall genereras av denna sektor.

Identifiering av fosfatfosfors käll- och flödesfördelning i ett litet jordbruksområde

Eutrophication of lakes and streams are nowadays a well known environmental problem and implies an enrichment of the nutrients phosphorus (P) and nitrogen (N). Phosphorus is considered to be the most important component for the growth of aquatic plants and leads in too large quantities to an intensification of growth. Phosphate (PO4) is the fraction of phosphorus that can easiest be taken up by plants and thus have the greatest impact on eutrophication. Increased plant growth in lakes and unfavorable conditions for aquatic animals are two examples of negative consequences. A significant portion of the increased nutrient supply to nearby water can be derived to phosphate leaching from agricultural areas, where private sewers and agriculture is two main sources.

SEO-vänligt CMS med ASP.NET MVC

Fossil fuels are affecting our climate negatively and there is a limited amount of them in the world, which leads to the importance of finding alternative fuels. One alternative is biogas, which is produced though a digestion process of different organic materials in a biogasreactor. Organic substrate that comes from farms has the biggest potential to increase the production of biogas in Sweden. Primarily crops from farms, but also waste products like manure are of great importance.Today there is a calculated theoretical potential for biogasproduction of 14TWh per year, which is around ten times larger than Sweden?s production today.

Environmental variables determining the occurrence of the red-listed Carbonicola anthracophila and C. myrmecina in boreal forests

The global biodiversity loss is mainly due to human activities such as an intensification of forestry. Boreal forest ecosystems in Fennoscandia are characterized by disturbances such as forest fires, storms and floods. However, industrial forestry practices suppress forest fires and change the landscape, leading to a loss of habitats and associated species. Particularly lichen species with slow adaptation abilities and a strong substrate specificity face an extinction debt in boreal forests since their substrates are long-lived but no longer created. In this study the species-substrate relationship of two red-listed forest-fire dependent lichen species Carbon-icola anthracophila and C.

Fosforavskiljning och hydraulisk konduktivitet i markbaserade reningssystem ? Kornstorleksfördelningens betydelse

Fosforutsläpp kan leda till övergödning i vattenrecipienten om kritiska nivåer överskrids. De enskilda avloppen står idag för en relativt stor andel av Sveriges fosforutsläpp jämfört med de kommunala avloppen. Detta kan sättas i bakgrund av att staten, alltsedan 1970-talet, har lagt ner stora resurser på att reducera utsläppen hos kommunala avlopp, medan en motsvarande satsning på de enskilda avloppen uteblivit.Merparten av dagens enskilda avlopp utgörs av markbaserade reningssystem, det vill säga avloppslösningar där avloppsvattnet får passera genom markmaterial för att renas. Fosforreningen i markbaserade reningssystem har forskningshistoriskt sett inte varit en prioriterad fråga, vilket har lett till kunskapsbrist inom området. Naturvårdsverket har i och med miljöbalkens införande skärpt sina krav på fosforreningen hos enskilda avlopp.

Skaftslamkrypa (Elatine hexandra) i Bolmen, utbredning, tillväxt, reproduktion och styrande faktorer

The plants in the genus Elatine are characteristic for oligo and mesotrophic lakes. This study focuses on Elatine hexandra one of the four species in Sweden. It is stated as vulnerable by the National Environment Agency and a conservation plan with guidelines to preserve the plant in Sweden is under preparation. There have been a few previous studies investigating this plant in other countries but this is the first one for Sweden. The aim of this study was to investigate the distribution, growth and reproduction of E.

Strategiskt beslutsfattande : hur svenska lantbrukare agerar för att anpassa sig till sockerreformen

A severe profitability decline in sugar beet production in all of Europe is one of the consequences of the latest reform of the EU sugar regime. In south of Sweden, sugar beets is the crop that has been the most profitable by far for the last decade. The high profitability has contributed to the high rate of increase in the price of land and has restrained the structural change towards a more effective agriculture. Because of the reform, all sugar beet producers are facing diminishing income and must find ways to compensate this. The aim of this master thesis is to study how Swedish farmers adapt to the sugar beet reform. A questionnaire was sent to 354 randomly selected sugar beet producers.

En jämförelse mellan amplifierad singelmolekylanalys och selektiv agar vid kontroll av hygienisering av avloppsslam

Bringing back the nutrients from the city to the country is becoming increasingly important, as the world?s stores of nutrients get more exhausted. Sewage sludge is an unapplied resource, rich in plant nutrients, which could replace parts of the commercial fertilizers used in Sweden today. Sewage sludge may contain large amounts of pathogens, such as Campylobacter and Salmonella, why use can cause severe spreading of infections, both to animals and humans. These pathogens have the ability to survive for a long time in soil and water and therefore some sort of treatment of the sludge is recommended before use.

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