Sökning: "shallow lake"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden shallow lake.

  1. 1. Response of Bolivian Altiplano Lakes to Seasonal and Annual Climate Variations

    Författare :Ramiro Pillco; Avdelningen för Teknisk vattenresurslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENSO; terminal lake; bathymetry; lake level; water balance; lake routing; paleolakes; climate change; precipitation pattern; intermittent rivers.; Desaguadero River; Lake Titicaca; Lake Poopó;

    Sammanfattning : The Bolivian Altiplano is situated between two mountain ranges, the western and eastern central Andes in South America. It has two major lakes, Lake Titicaca to the north, and Lake Poopó to the south, which both are important for the nature as well as for the living conditions on the Altiplano. The two lakes are the remnants of large paleolakes. LÄS MER

  3. 2. Biogeochemical evidences of human intervention in a shallow lake, Zeekoevlei, South Africa

    Författare :Supriyo Das; Joyanto Routh; Michael R. Talbot; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lake; primary productivity; biomarkers; stable isotopes; trace elements; phosphorus; Earth sciences; Geovetenskap; geokemi; Geochemistry;

    Sammanfattning : This thesis describes a multi-parameter biogeochemical investigation in a shallow hyper-eutrophic freshwater coastal lake, Zeekoevlei, in South Africa. The predominance of autochthonous algal-derived organic matter in lake sediments is indicated by low C/N, high H/C ratios and δ13Corganic values. LÄS MER

  4. 3. Lake Hydrodynamics and Pollution Transport under Climate Change : The Case of Lake Victoria

    Författare :Seema Paul; Henrik Ernstson; Zahra Kalantari; Abhijit Mukherjee; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bathymetry mapping; model verification; water balance; correlation; tracer transport; wind hydrodynamics; pollution and nutrient transport; climate effect; Mark- och vattenteknik; Land and Water Resources Engineering;

    Sammanfattning : A very small part of the total earth’s water is freshwater (only 2.5 %). Unfortunately, due to climate change and pervasive manmade activities, surface freshwater quality in many places of the world has become degraded. LÄS MER

  5. 4. Data preparation, hydrodynamic and contaminant transport shallow-water simulations of Lake Victoria

    Författare :Seema Paul; Vladimir Cvetkovic; Jesper Oppelstrup; Roger Thunvik; Felix Mtalo; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lake bathymetry model; Steady-state analysis; Numerical model validation; Lake water balance; Correlation and seasonal variations; Solute transport; Vattendjupskarta; Validering av numerisk modell; Vattenbalans; Korrelationer och säsongs-variation; Transport av lösliga ämnen; Mark- och vattenteknik; Land and Water Resources Engineering;

    Sammanfattning : This study explores shallow lake numerical hydrodynamic processes that support model development and validation, extreme events and effects of water circulation in Lake Victoria. Lake Victoria is the second largest freshwater lake in the world, and the largest in East Africa. LÄS MER

  7. 5. Climate Effects on Phytoplankton Biomass and Functional Groups

    Författare :Hampus Markensten; Donald Pierson; Kurt Pettersson; Bengt Boström; Colin Reynolds; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Climate change; phytoplankton; chlorophyll a; Lake Mälaren; Galten; PROTBAS; numerical modeling; water quality; succession; shallow lake; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Future climate in temperate regions is projected to get warmer and in many cases wetter. This poses questions about how phytoplankton in our lakes will respond. LÄS MER