Avancerad sökning

Hittade 5 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Idealised remediation scenario in two small-scale intersecting fractures

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Agnes Zúniga Ekenberg; [2022]
    Nyckelord :;

    Sammanfattning : Analysis of mass transport in rock fractures has become increasingly important in underground storage of radioactive materials and remediation of polluted groundwater in fractured rock aquifers. Permeability of rock mass is regulated by present rock fractures, where flow is mainly through the fracture networks. LÄS MER

  3. 2. Modeling BOD removal in free watersurface constructed wetlands with variable residence time-based methods

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Degefu Yohannes Sebro; [2021]
    Nyckelord :BOD removal; Free water-surface constructed wetlands; VART-BOD; models; dynamic diffusion zone; Technology and Engineering;

    Sammanfattning : Constructed wetlands (CWs) have been applied for several years in the removal process pollutants from secondary treatment plants and stormwater. In this paper, the Variable Residence Time (VART) model for solute transport in streams was extended to simulate the BOD removal process in free water surface flow constructed wetlands (FWS CWs). LÄS MER

  4. 3. Water flow and solute transport through a frozen clay soil

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Anna Elena Hess; [2017]
    Nyckelord :pesticides; freezing; thawing; leaching; soil;

    Sammanfattning : Freezing and thawing of soil affect water flow in the vadose zone for instance by altering soil structure or ice blocking parts of the pore system. Changes in soil hydraulic properties impact solute transport and therefore the risk that pesticides and other agrochemicals are transported towards groundwater. LÄS MER

  5. 4. Reactive-Di usive Flow Inside Porous Medium

    Master-uppsats, KTH/Mekanik

    Författare :Peyman Olad; [2015]
    Nyckelord :;

    Sammanfattning : Understanding the reactive-di usive turbulent ow inside porous media is interesting in many applications. It could have geochemical applications such as describing the rock dissolution patterns in river beds or the e ect of riparian zones in nitrate attenuation. Other applications could be, e.g. LÄS MER

  7. 5. Modelling water intrusion impacts on pollutant transport from a municipal solid waste landfill in Sweden

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Aamir Ilyas; [2007]
    Nyckelord :Civil engineering; teknisk geografi; reactive transport models; PHREEQC; water intrusion; Environmental studies; offshore technology; Miljöstudier; Hydrogeology; geographical and geological engineering; teknisk geologi; Hydrogeologi; hydraulic engineering; soil mechanics; Väg- och vattenbyggnadsteknik; Earth and Environmental Sciences; Technology and Engineering;

    Sammanfattning : The landfills located at the sea shore or below the ground water table are a severe cause of concern due to their close proximity to sensitive coastal ecosystems and pristine ground waters. Therefore, it is important to assess the long term environmental risks of coastal landfills before their final closure. LÄS MER