Search for dissertations about: "Klas Hansson"

Found 3 swedish dissertations containing the words Klas Hansson.

  1. 1. Water and Heat Transport in Road Structures : Development of Mechanistic Models

    Author : Klas Hansson; Lars-Christer Lundin; Kurt Roth; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Hydrology; Water flow; Heat flow; Unsaturated flow; Freeze-thaw; Numerical models; Uncertainty analysis; Sensitivity analysis; Roads; Overland flow; Flow patterns; TDR; Water content reflectometer; Calibration; Fractures; Hydrologi; Hydrology; Hydrologi;

    Abstract : The coupled transport of water and heat, involving freezing and thawing, in the road structure and its immediate environment is important to consider for optimal design and maintenance of roads and when assessing solute transport, of e.g. de-icing salt, from roads. READ MORE

  2. 2. New methods for improving winter road maintenence

    Author : Mats Riehm; Per-Erik Jansson; Torbjörn Gustavsson; Klas Hansson; Meelis Mölder; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Winter road maintenance; Sensors; Infrared thermometry; Energy efficiency; De-icing salt; Other civil engineering and architecture; Övrig samhällsbyggnadsteknik och arkitektur;

    Abstract : Winter road maintenance activities are crucial for maintaining the accessibility and traffic safety of the road network during winters. Common winter road maintenance activities include plowing and the use of de-icing agents (e.g. NaCl) to avoid freezing. READ MORE

  3. 3. Water, Heat and Solute processes in Seasonally frozen Soils : Experimental and Modeling Study

    Author : Mousong Wu; Per-Erik Jansson; Jiesheng Huang; Klas Hansson; David Gustafsson; Nicholas Jarvis; KTH; []
    Keywords : AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; frozen soil; water-heat-solute transport; coupled effects; water and energy balance; uncertainties; 冻土;水热盐运移;耦合关系;水热平衡;不确定性; Mark- och vattenteknik; Land and Water Resources Engineering;

    Abstract : Soil freezing and thawing is of importance in transport of water, heat and solute, which has coupled effects. Solute type and solute content in frozen soil could influence the osmotic potential of frozen soil and decrease freezing point, resulting in differences in soil freezing characteristic curves under various solute conditions. READ MORE