Sökning: "Emån"

Hittade 3 avhandlingar innehållade ordet Emån.

  1. 1. När floden märkte marken : Om bruket av översvämningsmark längs med Emån och Ätran 1500–1910

    Författare :Oscar Jacobsson; Anders Wästfelt; Johan Berg; Jesper Larsson; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; historical geography; agricultural history; water history; floodplain; Sweden; wetland reclamation; meadows; Emån; Ätran; agricultural transformation; human-environment relations; geografi med kulturgeografisk inriktning; Geography with Emphasis on Human Geography;

    Sammanfattning : Large landscape transformations were an integral part of the agricultural revolution in Sweden, starting during the late 18th century. The 19th century was an especially intensive century when it comes to the transformation of the cultural landscape, not the least marked by extensive changes in the use of agricultural wetlands with interventions in watercourses, lowering of lakes and wetland reclamation. LÄS MER

  3. 2. Polychlorinated biphenyls (PCB) in a river ecosystem

    Författare :Gudrun Bremle; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrobiology; dredging; landfill; cleanup; remedial action; air; fish; sediment; Persistent organic pollutants; freshwater; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Sammanfattning : Atmospheric deposition is one source of persistent pollutants such as polychlorinated biphenyls (PCB) in aquatic environments. Other point sources can also contribute to the PCB loadings in the water. LÄS MER

  4. 3. Re-establishment of connectivity for fish populations in regulated rivers

    Författare :Olle Calles; Larry Greenberg; Lars Nyberg; David Scruton; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attraction efficiency; Connectivity; Flow regime; Hyporheic water quality; Nature-like fishway; Passage efficiency; Regulated river; Remedial measures; Salmo trutta; Biology; Biologi; Biology; Biologi;

    Sammanfattning : The hydropower industry has altered connectivity in many rivers during the last century. Many fish species depend on both an intact longitudinal connectivity to be able to migrate between spawning, feeding and winter habitats, and vertical connectivity for development and survival of incubating embryos and larvae in the gravel. LÄS MER