Sökning: "Brownification"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Brownification.

  1. 1. Lakes are browner in the south than in the north of Sweden despite similar levels of dissolved iron

    Magister-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Författare :Fredrik Lindgren; [2019]
    Nyckelord :Brownification; DOC; dissolved iron; humic lakes; sulphur deposition; absorbance; climate change;

    Sammanfattning : During recent decades many lakes have become browner in the northern hemisphere and more specific in Sweden. This process is called brownification. Brownification of lakes makes it more difficult to clean water to drinking water and may have negative ecological effects on biota. LÄS MER

  2. 2. Våtmarkens kapacitet - kan en våtmark optimeras för att minska såväl eutrofiering som brunifiering?

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Josefina Almén; [2019]
    Nyckelord :wetland; brownification; DOC; nutrients; water quality; Earth and Environmental Sciences;

    Sammanfattning : Due to changes in land use, as well as impacts from the climate change, our inland waters are now exposed to problems such as eutrophication and brownification. This complicates management to develop clean drinking water, as well as it leads to anoxic bottoms and reduces primary production. LÄS MER

  3. 3. Organic nitrogen and carbon in Swedish rivers : increasing trends from 1987-2017

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Maya Ahlgren; [2018]
    Nyckelord :total organic nitrogen; total organic carbon; eutrophication; Sweden; dissolved organic carbon; brownification; Pearson’s correlation; Baltic Sea; Earth and Environmental Sciences;

    Sammanfattning : In the past decades, increased organic carbon concentrations have been reported from freshwaters across the Northern Hemisphere. However, there is little knowledge regarding whether or not these changes are linked to increasing concentrations of organic nitrogen. LÄS MER

  4. 4. Long-term trends in bottom water chemistry of Swedish lakes

    Magister-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Jelena Rakovic; [2017]
    Nyckelord :hypolimnion; sediment; oxygen; dissolved organic carbon; phosphorus; ammonium; silica;

    Sammanfattning : Long-term monitoring of lake water is essential for tracking local and long-range effects of anthro-pogenic pressure and to inform policy aiming at mitigating human environmental impacts. Swedish reference lakes are recovering from acidification; are subject to climate change and increasing inputs of terrestrial dissolved organic matter (DOM). LÄS MER

  5. 5. Membrane screening to identify optimal properties when separating organic matter from Bolmen water

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Olivia Söderman; [2017]
    Nyckelord :natural organic matter; ultrafiltration; nanofiltration; drinking water; membrane technology; water engineering; environmental engineering; vattenförsörjningsteknik; avloppsteknik; Chemistry;

    Sammanfattning : In many places across the northern hemisphere, drinking water treatment plants (WTPs) need to avert the effects of deteriorating quality in surface water sources caused by increasing lev-els of natural organic matter (NOM). The two major factors responsible for this phenomenon, also called brownification, are the greenhouse effect and changes in soil acidification. LÄS MER