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766 Uppsatser om Soil conservation - Sida 43 av 52

Den licensierade vargjaktens betydelse för vargstammen

In October 2009, a new decision was made concerning the administration of predators which resulted in a new wolf policy in Sweden. This meant that the wolf population now should be limited to 210 individuals by harvest. The new policy also recognized that the public acceptance of this species must increase and the genetic status improved. In the 17th of December a decision was taken by the Swedish parliament that it should become legal to hunt wolves in Sweden. The wolf hunt resulted in debate on a large scale amongst people, some thought of it as a good decision while others thought it was wrong.

Hårdhetsvariation i grundvatten längs Badelundaåsen mellan Leksand och Avesta

Water hardness indicates the concentration of calcium and magnesium ions in water. Water with high concentrations of these ions is described as hard water and water with low concentrations is described as soft water. Water that is too hard or too soft can lead to technical and economical problems. In collaboration with Midvatten AB, groundwater hardness in the Badelunda esker between Leksand and Avesta has been mapped, and an attempt has been made to explain the variations. For this purpose, different GIS programs, such as ArcView, ArcInfo, IDIRISI, and one geochemical modelling program, PHREEQC, has been used.

I vatten eller jord? : Nytolkning av depåfyndet från Eskelhem

In 1886 Hans Hildebrand received a Bronze Age hoard found in a field that belonged to Eskelhem´s rectory. A record was made where Hildebrand presented and documented the artifacts. The following year Oscar Montelius reviewed the artifacts, which he described as horse gears. He compared the horse gears with similar artifacts found in Europe that roughly had the same dating in order to trace the origin of the hoard.  Montelius conclusion was that the hoard was created on Gotland around 500 BC.

National Trust som historieberättare : en diskussion kring restaureringar av historiska trädgårdar inom National Trust, med Standen som exempel

Denna uppsats handlar om de val som görs vid bevarande av historiska trädgårdar inom National Trust, en av Englands största förvaltare av historiska trädgårdar, samt hur dessa val påverkar den historia som berättas på platsen. De tre frågeställningar som behandlas i uppsatsen är: (1) Hur beslutar National Trust vilken historia som ska berättas på platsen? (2) Vilka riktlinjer och bevarandeprinciper ligger till grund för dessa beslut? och (3) Hur har National Trust omsatt riktlinjerna vid restaureringarna av National Trusts trädgård på Standen? Syftet är att synliggöra valen, på vilka grunder de fattas och genom att ställa detta i relation till hur den slutliga utformningen blivit få en bild av hur National Trust väljer att berätta en plats historia. I den första delen görs en genomgång av trädgårdsbevarandets historia inom National Trust, teoretiska begrepp samt riktlinjer och strategier som är aktuella i dagsläget. I den andra delen görs en fallstudie av en anläggning där det för närvarande pågår ett restaureringsprojekt, Standen. I den tredje delen diskuteras de tre frågeställningar mot bakgrund av litteratur, dokument, intervjuer och platsbesök. Genom att analysera hur förändringar har genomförts på Standen jämförs hur riktlinjerna och principerna implementerats och hur detta påverkar den berättelse som presenteras för besökaren. Slutsatsen från uppsatsen är att National Trust har genomfört ett omfattande förändrings-­ och moderniseringsarbete under 2000-talet som lett till att de lokala anläggningarna fått ett betydande inflytande över hur en plats betydelse uttrycks. National Trusts riktlinjer utgår från internationellt erkända dokument såsom Florensdeklarationer och Burra charter men de också utvecklat egna strategier för att öka det lokala engagemanget och tillgängligheten som framgångsrikt implementerats på Standen. Besluten om vilken historia som ska berättas har fattats i nära samarbete med centrala organ inom National Trust, medan besluten om hur den berättas i stor utsträckning sker lokalt..

Vårdprogram för Österby bruks köksträdgård :

Svenska (engelska se nedan) Detta examensarbete är ett vårdprogram över Österby bruks köksträdgård. Österby bruk är beläget i norra Uppland cirka fem mil norr om Uppsala. Redan på 1500-talet började järnindustri växa fram på Österby. Österbys järnindustri kom att pågå fram till nedläggningen av Österbyverkan 1983. Dagens köksträdgård tillkom i och med den omgestaltning av hela herrgårdsanläggningen som startade på mitten av 1700-talet.

Effekt av brand och bete p? uppkomst av ?rtartade v?xter i restaurerade betesmarker. En j?mf?rande studie

Open ecosystems, such as grasslands and pastures, have naturally been shaped by disturbances like fire and grazing. These processes play a crucial role in creating habitats with high biological diversity, particularly favourable for a wide range of herbaceous plant species. In recent years, many of these disturbances have ceased, leading to encroachment, fragmentation and habitat loss. The aim of this study was to examine and compare the effects of fire, herbivory and a combination of fire and herbivory on the emergence of herbaceous plants. The study was conducted at the Ecopark at Nordens Ark.

Svartedalens naturreservat : en social rikedom värd att utveckla!

Svartedalens nature reserve a social richness worth develop. The nature reserve of Svartedalen is an area of high biological and social values. The reserve is located close to several densely populated areas. The reserve has been classified as a national area of interest for nature conservation and outdoor life, and as a Natura 2000 area according to both the bird- and habitat directions. The reserve is the largest landarea in Västra Götaland, 3 410 hectares, where a resolution has been made about all these forms of protection. The foundation Skogssällskapet owns 1 956 hectares of the reserve, at 1 384 hectares of the property they pursue FSC-certified silver culture, according to current management plan.

Undersökning av utökade användningsområden för Lotsbroverkets slam

Lotsbroverket is the largest wastewater treatment plant on the Aland Islands and it isdesigned for handling wastewater from approximately 30 000 persons. In 2011,Lotsbroverket produced about 2800 m3 of dewatered sludge. The sewage sludge that isproduced is transported to a contractor where it is processed to eventually be used e.g.in the construction of green space. This study aims to investigate available applicationoptions in terms of the sewage sludge that is produced in Lotsbroverket. The main aimis to study the feasibility of using the produced sewage sludge as a fertilizer in theagriculture of the Aland Islands.The sludge already fulfills limit values for heavy metals in accordance with the Act"The Aland Government´s directive on the use of sewage sludge in agriculture." Inorder to clarify the sludge content of pharmaceutical and organic substances it isrequired that the substances are identified and a risk assessment is performed.

Energiberäkningar för passivhus

AbstractClimate and environmental issues are of paramount importance. Researchers agreethat we must all contribute to a reduction of gases that contribute to climatechange. Energy consumption must decrease within all sectors and the promotionof renewable sources of energy must be introduced.Each sector should aspire to decrease its energy consumption. Energyconsumption is strongly linked to waste gases that contribute to climate change.Passive houses are a part of the construction industry's methods to attain energyconservation.Passive houses are derived from low energy houses and super insulated houses. Apassive house is intended to obtain heat from the inhabitants and through theiractivities.

En analys av nattliga koldioxidflöden i en boreal barrskog avseende spatial och temporal variation

Carbon dioxide in the atmosphere contributes to the greenhouse effect, which is essential tolife on our planet. Furthermore, it plays an important part of the photosynthesis andrespiration of the world?s organisms. Since the start of the industrial revolution the amount ofcarbon dioxide in the atmosphere has increased exponentially. The main source is theextensive burning of fossil fuels.

Tekniska lösningar för konstruerade växtbäddar ämnade för gatuträd

Det råder i dagens läge konkurrens mellan gatuträden och infrastrukturen. Människan som lever i den urbaniserade världen vill ha alla bekvämligheter inne i staden som kräver avloppsledningar, vattenledningar, gatubelysning, elledningar m.m. Samtidigt vill man ha gröna ytor i staden med stora pampiga träd. Oftast får dessa två, träden och infrastrukturen, slåss om platsen under marken och det är oftast det gröna som får lämna plats. Eftersom detta är ett återkommande problem vid de flesta nybyggnationer och nyanläggningar av ledningar, gator, parkeringar etc.

Resultat av tjugofem års mätningar av Cs-137-halter i älg i Uppsala län

At the end of April 1986 reactor number 4 of the nuclear power plant at Chernobyl explod-ed and large amounts of radioactive particles were then released into the atmosphere due to both the explosion as well as the consecutive fire of the graphite core. A cloud of radioac-tivity was spread over the northern hemisphere, including Sweden, due to the prevailing wind directions. The radioactive particles were washed out from the cloud by rain and snowfall in some areas of Sweden and deposited on the ground. The deposited radionu-clides, primarily cesium and iodine isotopes, were later absorbed into the soil and taken up by the roots of the plants. Some of these radionuclides, like 137Cs, still persist in some of the terrestrial ecosystems at relatively high concentrations which lead to contamination of the meat of moose, roe deer and wild boar even today.The two municipalities Heby and Uppsala, in the eastern part of central Sweden, experi-enced a relatively large deposition of 137Cs which resulted in high levels of 137Cs in moose and other game.

Skötselmetoder för bestånd med produktions- och naturvårdsmål :

This study is made on assignment by the local board of forestry in Skåne, Blekinge and Halland. The change of the forest law 1994 brought a new type of management plan. A more active planning was introduced in order to equate the environment goal with the production goal. The purpose with this study is to give a better picture of how planning for nature conservation in production forest is made and to develop support for selection of silviculture methods for stands with combined goals. With combined goals means production forestry with a reinforced consideration to both nature and culture, called PF-classified stands. This was done by: ? Describing silviculture models from the literature that are possible to use for stands with combined goals. ? Describing silviculture models that is used in practice in stands with combined goals. ? Describing how the classification of stands with combined goals is used. Which means, were in the terrain, with which frequency and in which type of forest PF-classification is used. ? Comparing differences and similarities of theoretical and practical used models. The study was done partly as a literature study and partly as an interview study of forest planners.

Kvalitet på vägdata : inventering av skogsbilvägars standard samt jämförelser med lokal bedömning och SNVDB.

During 2006 SNVDB (the national road data base for forestry) is being introduced to Holmen Skog. This data base contains all information about Holmen Skogs road systems. The information will then be used in different kinds of optimisation models which only produce correct and reliable results if the input data are of the adequate quality. Today there are reasons to believe that road data is of various qualities. The forest roads are often in a bad condition and have to be improved before a planned harvest. The cost of maintenance and construction of new roads is a large part of the total harvesting cost.

Identifiering av områden med risk för fosforförluster genom ytavrinning : metodutveckling med GIS

The eutrophication of lakes and seas with the algal bloom and deficiency inoxygen that follow, has been given priority by the Swedish government as oneof 16 environmental objectives. The purpose of this project was to develop a toolbased on a simple model, limited amount of data and geographic informationsystem (GIS) to identify areas with risk for phosphorus losses due to surfacerunoff. This tool can act as a decision support to decide where appropriatemeasures should be applied with the aim of reducing phosphorus losses and bythat the eutrophication.The method that has been used is a combination of two models, one calculatingthe potential erosion while the other one identifies areas of erosion (net erosion)or deposition. This ability is of great importance because potential erosionshould be calculated on areas with net erosion. Areas with high potential erosionhave an increased risk for phosphorus losses due to surface runoff.The potential erosion was calculated based on factors which describe how topography(LS), land use (C), soil type (K) and precipitation (R) effect the erosion.All of them have been modified to a greater or lesser extent.

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