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Showing result 1 - 5 of 7 essays matching the above criteria.

  1. 1. Carbon dioxide dynamics in agricultural streams : Investigation of two streams draining catchments dominated by agricultural land

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Albin Bostner; [2020]
    Keywords : Carbon dioxide; dynamics; streams; agriculture; oversaturation; metabolic control; hyrdological control; Koldioxid; koldynamik; bäckar; jordbruk; övermättat; metabolisk kontroll; hydrologisk kontroll;

    Abstract : In recent years, streams draining agricultural land has been suggested to exhibit high carbon dioxide (CO2) concentrations when compared to streams draining other land-types. The transport of carbon from land to ocean is mainly occurring through the chain of inland waters, and with agricultural land today representing 40% of all continental area many of these inland waters are influenced by agricultural land. READ MORE

  3. 2. Intelligent hydropower : Making hydropower more efficient by utilizing machine learning for inflow forecasting

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Jakob Claesson; Sam Molavi; [2020]
    Keywords : machine learning; inflow forecasting; hydropower; HBV model; maskininlärning; tillrinningsprognostisering; vattenkraft; HBV-modell;

    Abstract : Inflow forecasting is important when planning the use of water in a hydropower plant. The process of making forecasts is characterized by using knowledge from previous events and occurrences to make predictions about the future. Traditionally, inflow is predicted using hydrological models. READ MORE

  4. 3. Methane fluxes from tree stems in Amazon floodplains : Evaluating methodological aspect of measuring spatial and seasonal variability in a flooded system

    University essay from Linköpings universitet/Tema Miljöförändring

    Author : felicia Widing; Nina Rubensson; [2018]
    Keywords : CH4; Tree stems; Amazon floodplain forest; Wetlands; flux; Solimões; Negro; Tapajós;

    Abstract : Träd i tropiska våtmarker har uppmärksammats som en viktig källa till regionala och globala metan (CH4) utsläpp, då träd fungerar som utsläppskanaler för metan som bildas i sedimenten. Dock finns det en osäkerhet gällande säsongsvariation och rumslig variation samt mängden CH4 utsläpp från träd, eftersom kunskapen kring regionala flöden är begränsad. READ MORE

  5. 4. Modeling of temperature variations and response in a mining road bridge in Kiruna

    University essay from Lunds universitet/Avdelningen för Konstruktionsteknik

    Author : Mikael Fabricius; Henrik Ekman; [2016]
    Keywords : CLIMATE; TEMPERATURE; FINITE ELEMENT; DEFORMATIONS; KIRUNA; SMHI; BRIDGE; STRAINS; Technology and Engineering;

    Abstract : This thesis treats a concrete bridge located in Kiruna, in the north of Sweden, which was used for the mining industry. A finite element model has been created with the finite element software Abaqus to find out if it accurately can describe the variation of the temperature and deformation within the bridge over time. READ MORE

  6. 5. Inventory of hydrological measurements in Sweden

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Ida Enjebo; [2014]
    Keywords : Hydrological observations; water stage; river discharge; accuracy; Hydrologiska mätningar; vattenstånd; vattenföring; noggrannhet;

    Abstract : This thesis aimed to study how different actors perform hydrological observations in Sweden. Target groups for the study were institutions that regularly measure water stage and river discharge, including water councils, water- and wastewater departments in municipalities, water authorities and hydropower companies. READ MORE