Sökning: "DOC"

Visar resultat 1 - 5 av 161 uppsatser innehållade ordet DOC.

  1. 1. Development and Testing of a Hydro-Chemical River MixingModel to Investigate Sources of Carbon and Mercury in the Mackenzie River Basin, Canada

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Torbjörn-Johannes Erikson; [2020]
    Nyckelord :mercury; Hg; POC; DOC; Mackenzie River; kvicksilver; Hg; DOC; POC; Mackenziefloden;

    Sammanfattning : Mercury, Hg, is found in Arctic biota in alarming quantity, posing a potential health risk for the local population. It is believed that the large Arctic rivers contribute to this. The Mackenzie River annually transports approximately 325 km3 water to the Arctic Ocean, which is ca 10% of the freshwater received. LÄS MER

  2. 2. Potentiella miljörisker med geoenergisystems temperaturpåverkan i mark och grundvatten

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Julia Nilsson; [2020]
    Nyckelord :Geoenergi; grundvattenkemi; mikroorganismer; flora; fauna; Earth and Environmental Sciences;

    Sammanfattning : The aim of this literature study was to answer whether the thermal impact of geothermal energy systems pose a potential environmental risk to groundwater quality and microorganisms in the sub surface and to above ground vegetation. This study shows that the thermal impact of high temperature systems operating with temperatures ≥25⁰C in groundwater could lead to adverse effects on groundwater chemistry and biodiversity, such as mobilization of arsenic and DOC. LÄS MER

  3. 3. Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes.

    Kandidat-uppsats,

    Författare :Juan Manuel de la Quintana; [2020]
    Nyckelord :Lake; zooplankton; phytoplankton; DOC and DIN:TP.;

    Sammanfattning :     Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. LÄS MER

  4. 4. Impact of different catchments on the Brownification of Lake Bolmen

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

    Författare :Kaela Chileshe; [2020]
    Nyckelord :Brownification; dissolved organic carbon DOC ; Iron Fe ; water colour; landscapes; climate change;

    Sammanfattning : Increased DOC and Fe concentrations from terrestrial landscapes has led to the browning of boreal surface waters. The negative societal and ecological impacts of brownification are increased cost of water purification, increased presences of algae and cyanobacteria, loss of ecosystem services and reduced recreational value. LÄS MER

  5. 5. Ecosystem restoration and community involvement in the Whangamarino Wetlands of New Zealand

    Master-uppsats, SLU/Dept. of Urban and Rural Development

    Författare :Nicholas Magnolfi; [2020]
    Nyckelord :ecosystem restoration; community involvement; process-oriented restoration; science practice gap; theoretical framework;

    Sammanfattning : Ecosystem restoration is the process of assisting the recovery of an ecosystem. The community’s role in restoration projects is key. Good restoration includes social and cultural goals determined by stakeholders’ perspectives, making it process-oriented. LÄS MER