Sökning: "river chemistry"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden river chemistry.

  1. 1. Coupling between iron and humic substances in a land-sea transitional zone in the northern Baltic Sea

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Anna Osterman; [2023]
    Nyckelord :Iron; Humic substances; Dissolved organic carbon; Baltic Sea; Rivers;

    Sammanfattning : In marine ecosystems around the world, iron (Fe) is a well-studied and important trace element which has been found to stimulate phytoplankton and cyanobacteria growth, as well as limit nitrogen fixation and being essential for Legionella pneumophila which is known as the main cause of Legionnaires’ disease. Fe also contributes to the brownification of freshwater and has recently been documented to increase in concentration in rivers in Sweden. LÄS MER

  3. 2. Long-Term Impact of Drought on AcidSulfate Soil Leaching, a Study of NineCatchment Areas in Sweden and Finland

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

    Författare :Emilie Åström; [2022]
    Nyckelord :acid sulfate soil; hydrological drought; water chemistry; metal leaching; sulfate concentration; sur sulfatjord; hydrologisk torka; vattenkemi; metallurlakning; sulfatkoncentration;

    Sammanfattning : Sediments rich in sulfide were deposited in the Littorina sea in an environment that was shallow, anoxic,and reductive. The sediments were brought above sea level by isostatic uplift and can now be foundalong the coast of the Baltic sea. LÄS MER

  4. 3. How does hydropeaking and geological substrate affect aquatic macroinvertebrates in a regulated river?

    Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Författare :Andreas Vernby; [2021]
    Nyckelord :Hydropeaking; geological substrate; aquatic macroinvertebrates; EPT species; Hester-Dendy samplers; Korttidsreglering; geologiskt substrat; akvatiska makroevertebrater; EPT; Hester-Dendy-provtagare;

    Sammanfattning : Hydropower is an important source of renewable energy, but is often a cause of degradation to river ecosystems. Hydropeaking, i.e. the frequent alteration of discharge, is a process involved in hydropower generation and has been proven to affect aquatic organisms negatively. LÄS MER

  5. 4. Kalibrering och funktionskontroll av hydrologisk mätutrustning vid Islandsfallet, Uppsala

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Maria Jonsson; [2019]
    Nyckelord :The river Fyris; water chemistry; rating curve; Fyrisån; vattenkemi; avbördningskurva;

    Sammanfattning : En funktionskontroll har utförts av en nyinstallerad hydrologisk mätutrustning i Fyrisån som rinner genom Uppsala, där analyser av inhämtade vattenprover har jämförts med mätvärden från mätutrustningens sensorer. Genom en interkalibrering med en äldre mätstation har en avbördningskurva tagits fram till mätstationen vilket visade sig vara en enkel metod som gav tillförlitliga värden. LÄS MER

  7. 5. Hydrological and chloride transport processes in a small catchment of the Norrström Basin : a MIKE SHE modelling approach

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

    Författare :Zhuhuan Liu; Chen Zhou; [2019]
    Nyckelord :MIKE SHE; Hydrological Modelling; Kringlan; Water Balance; Particle Tracking;

    Sammanfattning : Water is ubiquitous on our planet and constitutes a vital part of ecosystems. It supports the life of all beings on the earth while simultaneously evokes water-related issues such as water shortage, water contamination. As UN advocates, a globally shared blueprint for available clean water is depicted in Sustainable Development Goals (SDGs). LÄS MER