- Home
- Conferences
- Conference Proceedings
- Conferences
1st EEGS Meeting
- Conference date: 25 Sep 1995 - 29 Sep 1995
- Location: Torino, Italy
- ISBN: 978-94-6282-129-3
- Published: 25 September 1995
61 - 80 of 142 results
-
-
Variation of Longitudinal and Transverse Dispersion with Flow Velocity - a Laboratory Study
Authors N. Tosi, C. Calabrò, A. Ghiotto, S. Pisani, G. Beltramelli and G. ZiglioA large series of laboratory experiments have been carried out, utilizing a box of longitudinal dimension of the order of a meter, filled with a highly homogeneous and isotropic artificial porous medium, consisting of glass heads (diameter 0.5 mm), to determine and characterize the eventual dependence of longitudinal and transverse dispersion on flow macroscopic velocity.
-
-
-
Delineation of Groundwater-Flow with Self-Potential Tomography
Authors M. Hammann, H. R. Maurer, H. Horstmeyer and A. G. GreenSubsurface fluid flow phenomena may under favorable circumstances be described quantitatively on the basis of self-potential (SP) measurements.
-
-
-
Hydrogeology Supported by Geophysic
Authors J. Kiss, L. Vertesy, G. Csillag, K. Gondar and L. KoloszarThe project aimed to clarify the hydrogeological circumstances of a urineral water well. Nowadays the well produces water from 12m depth, but previously it was known as natural spring. Before the project the origin of the water was unknown, so the planning of the mise of the production rate and the delineation of the protection area could not based on actual data. To provide the needed data, detailed geological mapping, processing archive and new geophysical data, water table determination and chemical analysis were performed. This paper deals mainly with the geophysical aspects of this integrated geologicalgeophysical work.
-
-
-
Detection of the saline Water Layers beneath the Sea of Galilee by the Time Domain Electromagnetic (TDEM) Method
Authors M. Goldman, B. Rabinovich, Y. Rotstein and H. GvirtzmanThe Sea of Galilee (Lake Kinneret) is the most important surface fresh water reservoir in Israel, providing approximately 500 million m3 of water per year. The Lake is, however, adversely affected by emergent saline springs, only some of which are diverted.
-
-
-
Bi-dimensional Modelling of Resistivity and IP Data for Hydrogeological Problems
Authors M. Marchisio, L. D‘Onofrio and E. ForlaniIn hydrogeological investigations, when the geological situation looks like a layered condition, the basic geophysical survey technique is of course vertical electrical sounding, VES (possibly, closely spaced along the profiles: in our experience, infact, often also the flattest morphologies can hide discontinuities that can lead to misunderstandings).
-
-
-
The Assessment of Hydraulic Properties from Geophysical Data: Groundwater Bearing Layers
More LessVanishing resources of high quality groundwater result in the need for careful hydrogeological modelling as a help to prevent overpumping and pollution. Beside the storage capacity the most important parameter for this modelling is the hydraulic conductivity. The yield of well fields as well as the spread of contaminants is governed by this quanity.
-
-
-
Geoelectric Survey for the Study of the Mineralization and Vulnerability of a Southern Italy Volcanic Aquifer
Authors R. Quarto and D. SchiavoneThe volcanic complex of Mount Vultune (Southern Italy) represents a hydrogeologically relevant area for the presence of urineral waters. The waters are locally bottled by industries for drinking use. The demand of ever-increasing water quantities together with pollution problems call for a detailed knowledge of the geometry and hydrological characteristics of the aquifers as well as their vulnerability.
-
-
-
On the Resolution of Radar Tomography
Authors A. Godio and G. RanieriThe paper describes a simple procedure useful for modelling GPR tomographic data based on the ray tracing theory; the method achieves to generate synthetic radar traces for 2-D modelling of cross-borehole. The technique is suitable to verify the opportunity and the resolution of a radar survey for tomographic data processing.
-
-
-
Finite-difference Solutions of Electromagnetic Wave Propagation in Conducting Media
Authors T. Bergmann, J. O. A. Robertsson and K. HolligerTime-domain electromagnetic methods in geophysics include the relatively low frequency transient (TEM) and ground-penetrating radar methods. Problems of time-dependent electromagnetic wave propagation are generally not yet solvable for complex media. Mostly, these problems have been treated theoretically through frequency-domain approaches.
-
-
-
Quantitative Monostatie GPR Analysis in Interface Profiling: Electromagnetic Inversion
Authors A. Benassi and U. SpagnoliniIn shallow subsurface investigation and non-destructive testing ground penetrating radar (GPR) represents a promising technique that measures short pulse electromagnetic (EM) waves reflections (typical range: 10 MHz-2.5 GHz) due to variations in the electrical properties of medium.
-
-
-
Quantitative Monostatic GPR Analysis in Interface Profiling: Multisignal Detection-Based Layer Estimation
Authors V. Rampa, U. Spagnolini, G. Stagni and C. TojaDetection-based approach in monostatic ground penetrating radar (GPR) processing is a useful technique for estimation of echoes time of delay (TOD). Its main advantage is simplicity and efficiency in a moderate noisy environment with separate events to be used in any lager stripping roversion approach.
-
-
-
Use of Transient Electromagnetic and Magnetotelluric Methods for Characterisation and Delimitation of the Santa Catarina Aquifer (Chalco Sub-Basin, Mexico)
Authors S. Krivochieva, M. Chouteau, R. R. Castillo and T. G. MoranLocated in the northern part of the Chalco sub-basin (Basfin of Mexico), Santa Catarina ecological reserve is the main water-catchment point for more than 2 million people living in the southern suburbs of Mexico City.
-
-
-
Study of Regional Gamma-Ray Data in Central and Eastern Europe and the Radiometric Map of the Czech Republic
Authors M. Matolin and G. SiderisThe natural radiation environment is the main long term source of radiation exposure to man. It consist of cosmic rays, terrestrial radiation and radiation of other radionuclides occurring in the environment and causing external and internal exposure. In addition to natural radiation, different sources of man made radiation exist as well.
-
-
-
The Application of Shallow Geophysical Methods to Golf Course Management
Authors J. C. Tapias and A. CasasIn the last years proliferation of golf courses in arid and semi-grid zones, where water supply for other more important uses is not sufficienly satisfied, normaly originates vehement opposition by neighbouring people and also environmental associations.
-
-
-
Using the Geophysical Methods in Frame of the Environmental Projects in City Agglomerations of Slovakia
Authors J. Hricko, P. Bobovnicky and I. TunyiDuring last 5 years, more or less standard geophysical techniques have been used in frame of the huge environmental projects in Bratislava capital and Kosice city. They are: observations of the intensity and changes of the natural and anthropogenic magnetic activity; measurements of the electromagnetic smog level, caused namely by very high frequency radio-transmitters; radioactive pollution and radon risk assessment.
-
-
-
Protection of Environment from Radioactive Contaminations Caused by Use of Radioactive Isotops in Bore Holes
More LessIn order to control some processes accomplished in drilling wells and in those of production as well as to settle certain geological problems, in Albania are widly used methods of radioactive isotops injection.
-
-
-
Resistivity Variations in an Earth Embankment Dam in Sweden
Authors T. Dahlin and S. JohanssonRepeated resistivity measurements were started in two embankment dams as part of a research project. The aim of the project is to monitor the seasonal variation of the resistivity and to develop evaluation methods, monitoring systems and installations for embankment dams.
-
-
-
High Resolution Geophysical Sensing and Imaging
Authors R. J. Sporry, J. Roy, W. A. Hugens and N. SibhatThe need and usefulness of high resolution geophysical sensing and imaging has been illustrated by the results of several recent projects using geophysical techniques in environmental, civil engineering, groundwater, mining, archeological and soil surveys applications.
-
-
-
Multifold GPR Investigation of the Aquileia Archaeological Park
Authors I. Finetti, M. Pipan and G. CandottiAn Ultra High Resolution geophysical exploration programme was designed and completed in the area of the Aquileia archaeological park (north eastern Italy) as part of a cooperation between the Institute of Geodesy and Geophysics of the University of Trieste and the Superintendency of the Cultural Heritages of the Friuli Venetia Giulia.
-