Search for dissertations about: "Geophysics"

Showing result 1 - 5 of 173 swedish dissertations containing the word Geophysics.

  1. 1. Characterization of Hydrogeological Media Using Electromagnetic Geophysics

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Niklas Linde; Uppsala universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; Hydrogeophysics; radio magnetotellurics; ground penetrating radar; electrical resistance tomography; inversion; regularization; geostatistics; electrical anisotropy; fractured rock; Geofysik; NATURAL SCIENCES Physics Other physics Geophysics; NATURVETENSKAP Fysik Övrig fysik Geofysik;

    Abstract : Radio magnetotellurics (RMT), crosshole ground penetrating radar (GPR), and crosshole electrical resistance tomography (ERT) were applied in a range of hydrogeological applications where geophysical data could improve hydrogeological characterization.A profile of RMT data collected over highly resistive granite was used to map subhorizontal fracture zones below 300m depth, as well as a steeply dipping fracture zone, which was also observed on a coinciding seismic reflection profile. READ MORE

  2. 2. Magnetic Resonance Sounding (MRS) in groundwater exploration, with applications in Laos and Sweden

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Nils Perttu; Luleå tekniska universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences - Endogenous eartn sciences; geophysics; magnetic resonance sounding MRS ; spin echo; aquifer; groundwater; resistivity; salinity; Gotland; Khorat Plateau; Norrbotten; Geovetenskap - Endogen geovetenskap; Tillämpad geofysik; Applied Geophysics;

    Abstract : Water is essential for all life on the planet, sustaining and ensuring the earth’s ecosystem. Groundwater from a global perspective provides about 50 % of the potable water, 40 % of the industrial water and 20 % of the irrigation water. READ MORE

  3. 3. Seismic imaging of deep crustal reflectivity in Sweden and Iceland

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Niklas Juhojuntti; Uppsala universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; seismic; reflectivity; Moho; crust; signal; Geofysik; NATURAL SCIENCES Physics Other physics Geophysics; NATURVETENSKAP Fysik Övrig fysik Geofysik; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

    Abstract : Seismic reflection profiling, originally developed by the petroleum industry, was adapted to systematic imaging of deep structures some 25 years ago. In continental areas, these measurements often show weakly reflective upper crust and strongly reflective lower crust. READ MORE

  4. 4. Prediction of Strong Ground Motion and Hazard Uncertainties

    University dissertation from Uppsala : Universitetsbiblioteket

    Author : Behrooz Tavakoli; Uppsala universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; Disaggregation; Ground motion; Monte Carlo simulation; Seismic hazard; Geofysik; NATURAL SCIENCES Physics Other physics Geophysics; NATURVETENSKAP Fysik Övrig fysik Geofysik; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

    Abstract : The purpose of this thesis is to provide a detailed description of recent methods and scientific basis for characterizing earthquake sources within a certain region with distinct tectonic environments. The focus will be on those characteristics that are most significant to the ground-shaking hazard and on how we can incorporate our current knowledge into hazard analyses for engineering design purposes. READ MORE

  5. 5. Plane wave electromagnetic measurements for imaging fracture zones

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Lena Persson; Uppsala universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; Electromagnetic Measurements Fracture Zones; Geofysik; NATURAL SCIENCES Physics Other physics Geophysics; NATURVETENSKAP Fysik Övrig fysik Geofysik; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Abstract : Electromagnetic fields from distant radio transmitters interact with the resistivity structures in the earth. They can be regarded as plane-wave fields since their penetration depth is much smaller than their wavelength. READ MORE