Sökning: "nutrient discharge"

Visar resultat 1 - 5 av 28 avhandlingar innehållade orden nutrient discharge.

  1. 1. Spatial and temporal dynamics of nutrients in two agricultural catchments in southeast Sweden

    Författare :Andreas Milver; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HYPE-model; phosphorus; nitrogen; arable land; discharge; water quality modeling; snowmelt; nutrient transport; local information;

    Sammanfattning : Many lakes and coast areas in Sweden and all over the globe suffer from eutrophication, caused by an overload of phosphorus (P) and nitrogen (N). In Sweden these emissions from point sources, e.g. LÄS MER

  3. 2. Tracing environmental change and human impact as recorded in sediments from coastal areas of the northwestern Baltic Proper

    Författare :Lena Norbäck Ivarsson; Elinor Andrén; Thomas Andrén; Mikael Lönn; John Anderson; Södertörns högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; paleoecology; diatom stratigraphy; stable nitrogen isotopes; hypoxia; nutrient discharge; eutrophication; Medieval Climate Anomaly; Little Ice Age; Environmental Studies; Miljövetenskapliga studier; Östersjö- och Östeuropaforskning; Baltic and East European studies;

    Sammanfattning : The eutrophication of the Baltic Sea due to increased anthropogenic nutrient loads during the 20th century is well documented and studied. However, in the Baltic Sea drainage area, humans have affected the environment longer than the environmental monitoring can provide data for. LÄS MER

  4. 3. Nitrogen effluents from mine sites in northern Sweden : nitrogen transformations and limiting nutrient in receiving waters

    Författare :Sara Chlot; Anders Lundkvist; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : Process water discharged from mine sites may contain elevated concentrations of nitrogen (N) and phosphorus (P), which both are nutrients for algae and aquatic plants. Thus, discharge of nutrient rich mine water can result in algal blooms, eutrophication, oxygen deficiency and changed species composition in the receiving waters. LÄS MER

  5. 4. Control of nutrient fluxes in large river basins

    Författare :Andrzej Tonderski; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : Nitrogen and phosphorus transported with rivers from land to sea have been reported to be the major sources contributing to the eutrophication of the Baltic Sea. In this thesis, I describe how the sources and waterborne fluxes of nutrients in large river basins can be systematically assessed. LÄS MER

  7. 5. Climate Change Impacts on the Catchment Contribution to Lake Water Quantity and Quality

    Författare :Karen Moore; Kurt Pettersson; Donald Pierson; Timothy Kratz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Climate change; water quality modelling; Lake Mälaren; GWLF; nutrient transport;

    Sammanfattning : A key question related to climate change projections is how will aquatic systems respond to changes in variables such as temperature and precipitation? This thesis uses GWLF, a simple catchment scale model to explore potential impacts of climate change on water quantity and quality.River discharge and nutrient loads were modelled for several warmer world scenarios. LÄS MER