Sökning: "Groundwater abstraction"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden Groundwater abstraction.

  1. 1. High levels of nickel from sulphide soil in Umeå's raw water : Modeling of groundwater flow and mass transport in Forslunda aquifer

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

    Författare :Merhawi Belai; [2024]
    Nyckelord :nickel; sulfide; sulphide; groundwater; modeling; mass transport; Feflow; Umeå; nickel; sulfid; monosulfid; grundvatten; modellering; masstransport; Feflow; Umeå;

    Sammanfattning : The raw water in some of Umeå's abstraction wells has shown high nickel levels for more than a decade. The cause has not been determined but there is an investigation from 2010 where the results indicate sulphide clay found adjacent to two basins used for artificial infiltration. LÄS MER

  3. 2. Spatio-temporal analysis of groundwater-dependent precipitation based on Lagrangian moisture tracking

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Daowei Li; [2022]
    Nyckelord :Groundwater abstraction; groundwater dependent precipitation; ERA5 precipitation; Utrack; Lagrangian model.;

    Sammanfattning : Groundwater abstraction for irrigation use has steadily increased over the past decades, resulting in additional evaporation to the atmosphere, and increased precipitation. The precipitation stemming from groundwater irrigation (or Groundwater-dependent precipitation) has received little attention during recent years and is solely researched by the Eulerian model. LÄS MER

  4. 3. Risker och åtgärder för saltvatteninträngning i dricksvattenbrunnar i ett nutids- och framtidsperspektiv

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alicia Bizet; [2022]
    Nyckelord :Groundwater; saltwater intrusion; topography; well depth; sea; soil depth; soil type; measures; climate effect; future modelling; Grundvatten; saltvatteninträngning; topografi; brunnsdjup; hav; jorddjup; jordart; åtgärder; kli- matpåverkan; framtidsmodellering;

    Sammanfattning : Drygt en miljon invånare i Sverige är beroende av enskild dricksvattenförsörjning från grundvatten. För låga grundvattennivåer i grundvattenmagasin, kan bland annat leda till saltvatteninträngning i dricksvattenbrunnar. LÄS MER

  5. 4. Effectiveness of Barrier Well by Pumping Ratio Control for Saltwater Intrusion: Lab-Scale Experiments and Numerical Modeling

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Shinichi Ozaki; [2021]
    Nyckelord :Saltwater intrusion; Barrier well; Pumping ratio control; Production well; salinity-affected coastal aquifer; Critical groundwater pumping ratio; Technology and Engineering;

    Sammanfattning : Saltwater intrusion is the most challenging problem in coastal regions. To prevent saltwater intrusion, saltwater pumping from a barrier well is widely applied, which is a direct abstraction of intruded saltwater from a coastal aquifer. Owing to its easy installation, many studies have been carried out. LÄS MER

  7. 5. A Laboratory-Scale Examination to Find an Optimal Application for a Groundwater Barrier Well

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Tatsuya Nagino; [2021]
    Nyckelord :Groundwater; Seawater intrusion; Countermeasure; Negative hydraulic barrier; Sea level rise; Coastal aquifer; Technology and Engineering;

    Sammanfattning : Seawater intrusion has been aggravated due to anthropogenic reasons, such as sea level rise and over abstraction of groundwater, which is spoiling the groundwater sustainability. This study focused on a negative hydraulic barrier using a barrier well as a countermeasure. LÄS MER