SubjectsSubjects(version: 945)
Course, academic year 2023/2024
   Login via CAS
Geoelectrical prospecting - MG452P43
Title: Geoelektrický průzkum
Czech title: Geoelektrický průzkum
Guaranteed by: Institute of Hydrogeology, Engineering Geology and Applied Geophysics (31-450)
Faculty: Faculty of Science
Actual: from 2021
Semester: summer
E-Credits: 6
Examination process: summer s.:
Hours per week, examination: summer s.:3/2, C+Ex [HT]
Capacity: unlimited
Min. number of students: unlimited
4EU+: no
Virtual mobility / capacity: no
State of the course: taught
Language: Czech
Explanation: Výuka bude probíhat podle rozvrhu (úterý 9-13:00) od 15.2.2022
Note: enabled for web enrollment
Guarantor: prof. RNDr. Tomáš Fischer, Ph.D.
Teacher(s): prof. RNDr. Tomáš Fischer, Ph.D.
Mgr. Jan Valenta, Ph.D.
Incompatibility : MG452P23
Annotation -
Last update: DATEL (30.04.2002)
Basic equations of EM field, classification of geoelectrical methods. Resistivity method (sou-nding, profiling), multielectrode measurements, borehole variants of resistivity method. Mag-netotelluric method. Very low frequency method (inductive and resistivity variant). EM me-thods in frequency domain. Time domain EM methods. Georadar. Self-potential method. Induced polarization method.
Literature - Czech
Last update: DATEL (06.05.2004)

Reynolds J.M., An Introduction to Applied and Environmental Geophysics (kap. 3 a 4), John Wiley & Sons, N.Y., 1997.

Karous M., Geoelektrické metody průzkumu, SNTL, Praha, 1989.

Telford W.M., Geldart L.P., Sheriff R.E., Applied Geophysics (kap. 5, 6, 7, 8, 9), Cambridge University Press, Cambridge, 1990.

Requirements to the exam - Czech
Last update: prof. RNDr. Tomáš Fischer, Ph.D. (03.01.2012)

Závěrečná zkouška má písemnou a ústní část. K zápočtu je třeba odevzdat 5 vypracovaných protokolů.

Syllabus -
Last update: DATEL (06.05.2004)

1. Introduction - basic equations of EM field, types of EM fields, sources of geoelectrical fields, general measurement techniques, classification of geoelectrical methods.

2. Resistivity method - resistivity of rocks, basic theory of stationary electric field.

3. Resistivity sounding - direct problem, geoelectrical section, basic types of sounding curves, computation of theoretical curves, inverse problem, interpretation procedures.

4. Resistivity profiling - electrode arrays, direct problems, characteristic model curves, methodics of measurement, data processing, interpretation.

5. Multielectrode measurements - principle, methodics, application. Borehole variants of resistivity method - principles, modifications.

6. Magnetotelluric method - sources and character of MT field, EM induction in homogeneous halfspace, principle of MT sounding, sounding curves, interpretation.

7. VLF method - sources, signal propagation, origin of anomalies, elliptic polarization, inductive variant (methodics of measurement, characteristic curves, data processing, interpretation), VLF-R (principle, measurement, 2D inhomogeneities, two horizontal layers).

8. EM methods in frequency domain - quasistationary normal field of VMD and HED, principle of frequency sounding (far and near zone), EM profiling (principle, large source, moving source, conductivity meters).

9. Time domain EM methods - principle, origin of secondary field, normal field of loop and HED, near and far zone, transient sounding and profiling.

10. Georadar - principle of impulse georadar, central frequency, wave number, reflection, attenuation, wave length, methodics of measurement.

11. Self-potential method - natural electrochemical activity, origin of potentials, field measurements (potential, gradient), data processing, interpretation.

12. Induced polarization method - polarization of rocks, IP phenomenon, time domain IP (principle, measured parameters, methodics of measurement, interpretation), frequency domain IP ( amplitude-phase mesurements, spectral IP).

 
Charles University | Information system of Charles University | http://www.cuni.cz/UKEN-329.html