Search for dissertations about: "dredging"

Showing result 1 - 5 of 20 swedish dissertations containing the word dredging.

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

    Author : Gudrun Bremle; Biologiska institutionen; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. Sediment resuspension : Impacts and extent of human disturbances

    Author : Ingrid Tjensvoll; Clare Bradshaw; Torgeir Heggelund Bakke; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; marin ekotoxikologi; Marine Ecotoxicology;

    Abstract : Resuspension of sediment by anthropogenic disturbances is a concern due to the impacts it has on organisms and ecosystems. Bottom trawling is one major cause of sediment resuspension. A field study showed that a small trawl created a sediment plume 120 - 150 m wide and 15-18 m high (Paper 1). The sediment in the same study was highly contaminated. READ MORE

  5. 3. Microbial diversity in Baltic Sea sediments

    Author : Anna Edlund; Janet K. Jansson; Södertörns högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Havsbottnen; Mikroorganismer; Östersjö- och Östeuropaforskning; Baltic and East European studies;

    Abstract : This thesis focuses on microbial community structures and their functions in Baltic Sea sediments. First we investigated the distribution of archaea and bacteria in Baltic Sea sediments along a eutrophication gradient. READ MORE

  6. 4. Sustainable management of dredged sediments : potential recovery of valuable compounds

    Author : Laura Ferrans; William Hogland; Monica Odlare; Linnéuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dredged sediments; nutrients; metals; speciation; recovery; characterisation; beneficial use; life cycle assessment; extraction; plant-growing substrate; circular economy; Miljövetenskap; Environmental Science;

    Abstract : Dredging of sediments occurs worldwide to increase water depth in harbours, bays, lakes and rivers, as well as to recover aquatic ecosystems. Landfilling and open-ocean discharge are traditional disposal routes for dredged material. However, the methods are restricted by environmental and legal concerns. READ MORE

  7. 5. Three Dimensional Hydro-Morphological Modeling of Tigris River

    Author : Ammar Ali; Robert William Duck; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    Abstract : The River Tigris is a major river in Iraq. It divides Baghdad, the capital of Iraq, in two parts. The reach of the river within Baghdad is about 60 km long. The climate change within the region and the construction of hydraulic structures upstream of Baghdad has reduced the water discharge of the river by 44%. READ MORE