113 uppsatser · sida 3 av 8
-bevarandestrategi eller riskåtgärd?
… where the wetlands are sited, the areas that provide the wetlands with water were determined. The size of these drainage areas were determined in a GIS computer program. The type of land use within the drainage areas was also determined. During April 2010, water sampling in the …
… where the wetlands are sited, the areas that provide the wetlands with water were determined. The size of these drainage areas were determined in a GIS computer program. The type of land use within the drainage areas was also determined. During April 2010, water sampling in the …
The last decades have shown increased nitrogen leeching from soil to water recipients. This is in Sweden mainly due to over-manuring of agriculture land, effectivization of drainage systems and the declining extent of wetlands. The accumulated amount of nitrogen in water doesn’t …
studier av en mad vid Bornsjön
… was to reduce the amount of phosphorus entering the lake, which is the back-up water supply for Stockholm when the city cannot obtain water from Lake Mälaren. Large areas around Lake Bornsjön consist of agricultural land and the nutrient concentrations in the inflows to the lake …
Evaluation of phosphorus leaching aftermanure application using lysimeter techniques
… which is the main part of other P (OVRP), has been studied in percolating water. The experiment was conducted through irrigation of small soil columns containing clay topsoil from an experimental field in Västergötland. Three rain simulations were consecutively performed. DRP …
… in Åmot or Härstad achieves the guidelines of about 5 mg N l-1 in the incoming water. Therefore, they can be seen as inappropriate as reference wetlands according to their nitrogen retention. The wetland of Härstad, however, has significantly better N retention than the wetland …
… a small multimodal vehicle deals with this problem and uses both the land and waterways for transportation. When it comes to energy savings the structural mass is considered to account for 30% of the energy consumption of a car, why a weight optimized structure is desired when …
Är våtmarker och dammar vägen framåt”
The overall aim is to examine how the European Union Water Framework Directive has affected the local water management in the catchment Märstaån situated in the eastern part of the lake Mälaren river basin, Sweden. The first part of the study gives an historical overview of the …
… purpose of the investigation was to compare metal content in surface water in the areaand its catchments between year 2010 and 2003, also to make calculation of specific runoffand metal load, furthermore determine the recipients in the area. Surface water samplingwhere preformed …
… this thesis to investigate the possibility of energy assets in their cooling water and possible uses for it. The energy in the waste water is greater than the current need which has three uses which are (1) heating the factory, (2) converting liquid propane to propane gas and …
… types of stores are presented: rock cavern storage, tank storage, pit water storage, borehole storage and aquifer storage. In this thesis the principles of the different storages is presented and experiences from operation in Sweden, Germany and Denmark are also presented. The …
… possibilities to reduce the environmental load on the surrounding ground and water caused by heavy metals from the mine. The present report is a part of the main study. The aim of the work is to investigate the geochemistry of the groundwater. As a starting point, questions …
Highly polluted urban storm water from e.g. highways can contain large amounts of heavy metals that may cause harm if they are discharged into recipients. To remove the heavy metals a possible low-cost method that does not require much maintenance, could be the use of reactive …
… of changes in material behavior were emphasized in this study; the optimal water content and maximum dry density, as well as changes of both. As a reference for the limestone features, a traditional 0/32 mm tonalite material (granite) from Vällstaverket was used relating to …
… of the thesis was to map the hydraulic load on the Knivsta river from stormwater runoff, and build a platform for further studies of pollution loads on the rivers ecosystems. New residential areas are planned to be built in Knivsta municipality and it will have an impact on …
