Search for dissertations about: "Electrical Resistivity Tomography"

Showing result 1 - 5 of 8 swedish dissertations containing the words Electrical Resistivity Tomography.

  1. 1. Advances in time–domain induced polarisation tomography : Data acquisition, processing and modelling

    University dissertation from Department of Biomedical Engineering, Lund university

    Author : Per-Ivar Olsson; Lunds universitet.; Lund University.; [2018-11-05]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tomography; Signal–to–noise ratio; Waveform; Duty–Cycle; induced polarisation; Electrical properties;

    Abstract : Vad står vi på – hur tar man reda på det? Kanske man kan titta på en geologisk karta, borra ett hål eller gräva en grop? Det kan gå bra, men ibland finns det inte tillräckligt detaljerade kartor och att gräva upp allt man är intresserad av är ingen lysande idé. Tänk om man kunde forska fram en metod som gör att man kan se rakt igenom marken, som röntgenundersökningar på sjukhus! På sätt och vis kan man redan det, man kan skicka ner ström i marken som berättar om hur där ser ut när den kommer tillbaka. READ MORE

  2. 2. 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

  3. 3. Natural and Controlled Source Magnetotelluric Data Processing and Modeling

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Chunling Shan; Uppsala universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geophysics; Airborne Electromagnetic Method; Radio Magnetotellurics; Controlled Source Magnetotellurics; Electrical Resistivity Tomography; Moving Magnetotellurics; 2D inversion; 3D inversion;

    Abstract : In this thesis, four studies using different geophysical electromagnetic methods are presented. In the first study dealing with airborne measurements, the noise response due to the rotation of the aircraft and the aircraft itself as a metallic conductive body on the Earth's electromagnetic response in very low frequency and low frequency band was investigated. READ MORE

  4. 4. Joint inversion and integration of multiple geophysical data for improved models of near-surface structures

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Shunguo Wang; Uppsala universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; joint inversion; ERT; RMT; CSRMT; boat-towed; tomography; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Abstract : Geophysical methods are non-invasive and allow an effective way of understanding subsurface structures and their physical properties. One of the main challenges is the often non-uniqueness of the geophysical models and that several different models can explain a dataset to an agreeable fit. READ MORE

  5. 5. From 2D to 3D Models of Electrical Conductivity based upon Magnetotelluric Data Experiences from two Case Studies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Juliane Hübert; Uppsala universitet.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Magnetotelluric measurements are among the few geophysical techniques capable of imaging the structure both in the shallow subsurface as well as the entire crust of the Earth. With recent technical and computational advances it has become possible to derive three-dimensional inversion models of the electrical conductivity from magnetotelluric data, thereby overcoming the problems arising from the simplified assumption of two-dimensionality in conventional two-dimensional modeling. READ MORE