Search for dissertations about: "free thesis on water quality assessment"

Found 5 swedish dissertations containing the words free thesis on water quality assessment.

  1. 1. Uncertainty measurements and validation of ocean colour data in optically complex waters

    Author : José M. Beltrán-Abaunza; Susanne Kratzer; Samantha Lavender; Paul Glantz; Sven Blomqvist; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ocean colour validation; MERIS; in situ radiometry; water quality; CDOM; marin- och brackvattensekologi; Marine and Brackish Water Ecology;

    Abstract : The thesis addresses validation activities associated with the use of in situ and satellite-based radiometers to assess water quality parameters, such as chlorophyll-a (Chl-a), total suspended matter (TSM) and coloured dissolved organic matter (CDOM- also known as yellow substances, YEL) in CDOM-dominated waters. In paper I, an inter-comparison of in situ radiometers is presented. READ MORE

  2. 2. Laser Absorption Spectroscopy of Gas in Scattering Media

    Author : Märta Lewander; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; medical diagnosis; gas analysis; absorption spectroscopy; diode laser spectroscopy; light scattering; food-package monitoring; GASMAS;

    Abstract : Absorption spectroscopy constitutes a chemical analysis tool which can be applied to various samples and application fields. This thesis focuses on gas absorption spectroscopy with the means of diode lasers - tunable diode laser absorption spectroscopy, TDLAS. READ MORE

  3. 3. Retrieval of ocean surface winds and currents using satellite synthetic aperture radar and infrared radiometry

    Author : Gisela Carvajal; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; surface currents; infrared radiometry; synthetic aperture radar; surface winds; maximum cross correlation; wind direction;

    Abstract : This thesis focuses on the development, analysis and evaluation of methods for the retrieval of ocean surface winds with synthetic aperture radar (SAR) and surface currents with infrared (IR) radiometer sensors. The SAR wind speed retrievals are based on geophysical model functions using wind directions obtained with two approaches. READ MORE

  4. 4. Optimizing processes for biological nitrogen removal in Nakivubo wetland, Uganda

    Author : Joseph Kyambadde; Gunnel Dalhammar; Karin Tonderski-Sundblad; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental technology; Ammonium-oxidizing bacteria; Biological nitrogen removal; Coliform retention; Constructed wetlands; Cyperus papyrus; Miljöteknik; Environmental engineering; Miljöteknik;

    Abstract : The ability of Nakivubo wetland (which has performed tertiary water treatment for Kampala city for the past 40 years) to respond to pollution and to protect the water quality of Inner Murchison Bay of Lake Victoria was investigated. The aim of this study was to assess the capacity of Nakivubo wetland to remove nitrogen from the wastewater after its recent encroachment and modification, in order to optimize biological nitrogen removal processes using constructed wetland technology. READ MORE

  5. 5. Amoebiasis : Diagnosis and prevalence in León Nicaragua

    Author : Byron Leiva; Karolinska Institutet; Karolinska Institutet; []

    Abstract : About ten yearly cases of liver abscess are presented in University Hospital, León, Nicaragua. Based on serology most of them have been shown to be amoebiasis cases. This raised the question of Entameoba histolytica prevalence in the population. Based on microscopy of stool specimens and serology, about 20% prevalence was found. READ MORE