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Dissertations / Theses on the topic 'Geophysical methods'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Persson, Kjell. "Integrated geophysical-geochemical methods for archaeological prospecting." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279.

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2

Mainali, Ganesh. "Monitoring of tailings dams with geophysical methods." Licentiate thesis, Luleå : Luleå university of Technology, 2006. http://epubl.luth.se/1402-1757/2006/07.

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3

Fookes, Gregory Peter Gwyn. "Interactive geophysical data processing with eigendecomposition methods." Thesis, Birkbeck (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336344.

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4

Bérubé, Andrew Patrick. "Geophysical methods for the investigation of subsurface flows /." Luleå, 2002. http://epubl.luth.se/1402-1757/2002/20.

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5

Monteiro, Igor Oliveira. "Numerical methods for regularization models of geophysical flows." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/128048.

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Escoamentos geofísicos são aqueles escoamentos que são afetados pela rotação da Terra. Simulações computacionais envolvendo este tipo de escoamento tem diversas aplicações como, por exemplo, em estudos sobre mudanças climáticas e em previsões de tempo e do escoamento oceânico, imprescindíveis para o bemestar da sociedade moderna. Em especial no caso do Brasil, a importância destas simulações é ainda maior devido à sua ampla aplicação na indústria do petróleo. Porém, devido ao imenso número de Reynolds conferido a estes escoamentos, os recursos computacionais disponíveis atualmente (e decerto n

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6

Caudillo, Mata Luz Angélica. "Multiscale and upscaling methods for geophysical electromagnetic forward modeling." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63343.

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Accurate and efficient simulation of electromagnetic responses in realistic geophysical settings is crucial to the exploration, imaging, and characterization of buried natural resources, such as mineral and hydrocarbon deposits. However, in practice, these simulations are computationally expensive. The geophysical settings consider highly heterogeneous media and features at multiple spatial scales that require a very large mesh to be accurately represented. This results in a system of equations to be solved that often exceeds the limits of average computers. Thus, the key is to reduce the prob

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7

Wunderlich, Tina [Verfasser]. "Geophysical methods for the investigation of soils / Tina Wunderlich." Kiel : Universitätsbibliothek Kiel, 2012. http://d-nb.info/1022376063/34.

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8

Barkels, David, and Johan Åberg. "Mapping leachates and subsurface structures using different geophysical methods." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171814.

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The enrichment of ore produces large amounts of sulfur and metal-rich residual waste called tailings, which need to be deposited and stored for a long time. When the tailing is oxidized, large amounts of protons and metals are dissolved and diffuse to the groundwater. This poses a major environmental threat to biological life forms in the downstream ecosystem (Karltorp, 2008). In this study, leachate plumes and geological structures surrounding the tailings impoundment at the Kringelgruvan mine in northern Sweden have been successfully mapped using geophysical methods. Three methods have been

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9

Shank, Jared Wyatt. "A geophysical investigation to locate missing graves utilizing ground penetrating radar, electromagnetic, and magnetic methods." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1389704983.

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10

Beardwood, Fiona Nicole. "Computational methods of solving inverse problems, geophysical and medical applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq31113.pdf.

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11

Khatibi, Asfanjani Danial. "Determination of Homogeneity and Isotropy of Soil Using Geophysical Methods." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171849.

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Cognition of the hydraulic properties of soils is important in civil and environmental projects such as for water supply, geotechnical investigations and evaluation of pollutant spreading. This pilot project aims to develop and test a new method for characterization of the homogeneity and isotropy of different soils by using geophysical measurements. The method is based on geoelectrical (resistivity) measurements using a radial array. Using a radial array with electrode lines in various orientations crossing a midpoint at which water was infiltrated, it was possible to build a 3D-block model s

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12

Betson, Mark John. "Applications of geophysical methods to tracing flow through porous media." Thesis, Birkbeck (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397295.

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13

Bates, Dustin Thomas. "Characterizing River and Lake Sediments using Geophysical Methods in Urban Impacted Areas within Summit County Ohio." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1321298181.

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14

Tsang, Wing-shing, and 曾永成. "Borehole geophysics limitations of natural gamma and gamma-gamma density logging methods." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B42577238.

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15

Gehring, Iris. "Volcanostratigraphy using geophysical methods on La Fossa di Vulcano (S-Italy)." Doctoral thesis, [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964401533.

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16

Yeboah-Forson, Albert. "Hydrogeophysical Characterization of Anisotropy in the Biscayne Aquifer Using Geophysical Methods." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/919.

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The anisotropy of the Biscayne Aquifer which serves as the source of potable water for Miami-Dade County was investigated by applying geophysical methods. Electrical resistivity imaging, self potential and ground penetration radar techniques were employed in both regional and site specific studies. In the regional study, electrical anisotropy and resistivity variation with depth were investigated with azimuthal square array measurements at 13 sites. The observed coefficient of electrical anisotropy ranged from 1.01 to 1.36. The general direction of measured anisotropy is uniform for most sites

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17

Mitchinson, Dianne Edith. "Targeting Archean orogenic mineralization using physical properties and integrated geophysical methods." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/7574.

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Although Archean orogenic gold mineralization is not readily detected using geophysical methods, due to a lack of petrophysical contrast between typical low volumes of gold and hosting rocks, it is possible to use geophysics to detect other petrophysically distinct gold indicators. Geophysical inversion methods, in particular, make it possible to not only detect important gold-related rocks in the subsurface, but to map their distribution in three dimensions. The research presented examines the effectiveness of geophysical inversion as an exploration tool in the Archean orogenic gold environme

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18

Flores, Zamora Juan Carlos. "Integration of Geophysical Interpretation Methods Applied in the Perdido Fold Belt." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23129.

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Today, with discoveries of the fields Great White, Baha, Trident and Tobago in U.S portion and the recent drilling of wells Trion-1 and Supremus-1 in Mexican waters, have established the Perdido fold belt in the Gulf of Mexico as a significant potential petroleum province in its initial stages of evaluation. This area according with studies realized so far, shows an important potential of reservoirs associated with extra-light crude oil, however to explore, delimitate, characterize and produce these resources is necessary the implementation of the most modern technology of interpretation, dri

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19

Nelson, Catherine Elizabeth. "Methods for constructing 3D geological and geophysical models of flood basalt provinces." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/488/.

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In this thesis, realistic 3D geological models of flood basalt provinces are constructed. These models are based on outcrop observations and remote sensing data from the North Atlantic Igneous Province, collected by a variety of methods including terrestrial laser scanning. Geophysical data are added to the models to make them suitable for generating synthetic seismic data. Flood basalt provinces contain a number of different volcanic facies, distinguished by their outcrop appearance and physical properties. These include tabular-classic and compound-braided lava flows, intrusions and hyalocla

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20

Parker, Beatrice Smith. "Geophysical imaging methods for analysis of the Krafla Geothermal Field, NE Iceland." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77790.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 91-94).<br>Joint geophysical imaging techniques have the potential to be reliable methods for characterizing geothermal sites and reservoirs while reducing drilling and production risks. In this study, we applied a finite difference tomography method and a double-difference tomography method to image the P- and S-wave velocity structure of the Krafla geothermal reservoir in Northeastern Iceland. We c

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21

Cooper, Marie. "INTEGRATED GEOPHYSICAL METHODS IN INVESTIGATION OF CLAIBORNE AQUIFER HYDROSTRATIGRAPHY, JACKSON PURCHASE, KENTUCKY." UKnowledge, 2016. http://uknowledge.uky.edu/ees_etds/37.

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Increased groundwater withdrawals associated with agricultural irrigation in the Jackson Purchase have prompted questions related to groundwater availability and sustainability. Key factors in addressing these questions are understanding the extent and variation in thickness of the local hydrostratigraphic system, which is the upper part of the Mississippi Embayment aquifer system. Correlations of 70 gamma-ray well logs, and 49 resistivity logs were made across parts of the Jackson Purchase in Fulton and Hickman Counties in order to delineate the upper Claiborne aquifer and middle Claiborne co

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22

Zywna, Michal. "Analysis of Lining Properties at Landfills Using Geophysical Methods - Case Study: Tveta (Sweden)." Thesis, KTH, Teknisk geologi och geofysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96086.

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Recently established EU environmental legislation obliged Sweden to close many landfills until year 2020. Such an operation requires a lot of inexpensive and water resistant coverage materials. Six prototypes of linings were constructed at Tveta landfill. Built coverage consisted mainly of residual products such as compost, sludge, fly and bottom ash. Between 2004 and 2007 water permeability through tested coverage was well below the maximum limit for non-hazardous waste. However, recent lysimeter records indicated increased permeability through the constructed linings. Readings of water infil

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23

Kaye, Stephen Joseph. "The structure of Eastern Indonesia : an approach via gravity and other geophysical methods." Thesis, University College London (University of London), 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339890.

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24

Bhamidipati, Raghava A. "Use Of Laboratory Geophysical And Geotechnical Investigation Methods To Characterize Gypsum Rich Soils." UKnowledge, 2016. http://uknowledge.uky.edu/ce_etds/45.

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Gypsum rich soils are found in many parts of the world, particularly in arid and semi-arid regions. Most gypsum occurs in the form of evaporites, which are minerals that precipitate out of water due to a high rate of evaporation and a high mineral concentration. Gypsum rich soils make good foundation material under dry conditions but pose major engineering hazards when exposed to water. Gypsum acts as a weak cementing material and has a moderate solubility of about 2.5 g/liter. The dissolution of gypsum causes the soils to undergo unpredictable collapse settlement leading to severe structural

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25

Parks, Eric M. "Analysis of electromagnetic and seismic geophysical methods for investigating shallow sub-surface hydrogeology /." CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3343.pdf.

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26

Pearson, Patrick Ian 1964. "Application of electric and electromagnetic geophysical methods to detect fractures in unsaturated tuff." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278223.

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Three electrical and electromagnetic geophysical methods were used to examine the moisture and permeability distribution and identify fractures in a partially saturated, fractured ash-flow tuff near Superior, Arizona. Experiments using ground penetrating radar (GPR) to locate targets with known orientations in the tuff were used to assess the angular limits of fracture detection from radar profiles. Identification of fractures from radar records appears to be limited to those with dips of less than 45°. The application of a single well electrical tracer (SWET) technique proved effective in

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27

Parks, Eric M. "Analysis of Electromagnetic and Seismic Geophysical Methods for Investigating Shallow Sub-surface Hydrogeology." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2007.

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An integrated electromagnetic (EM) and seismic geophysical study was performed to evaluate non-invasive approaches to estimate depth to shallow groundwater in arid environments with elevated soil salinity where the installation of piezometers would be impractical or prohibited. Both methods were tested in two study areas (semi-arid and arid respectively), one in Palmyra, Utah, USA near the shore of Utah Lake where groundwater is shallow and unconfined in relatively homogeneous lacustrine sediments. The other area is Carson Slough, Nevada, USA near Ash Meadows National Wildlife Refuge in Amargo

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28

Iravani, Mohammad Ali. "Monitoring the remediation of coal tar in contaminated soil using electro-geophysical methods." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS330.

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Au cours des deux dernières décennies, la dépollution et la surveillance des sites pollués sont devenus une question sociétale importante. Les techniques classiques de surveillance par piézomètres et piézairs ne suffisent pas pour suivre les changements caractéristiques dans le sous-sol de ces sites en raison de leur caractère ponctuel. Ainsi l’interprétation de données géophysiques acquises lors de la surveillance de tels sites est un outil pour la dépollution de leurs sols. Les propriétés géophysiques sont des paramètres clés dans la validation des méthodes de dépollution des sols contaminés

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29

Hawke, Philip James. "The geophysical signatures and exploration potential of Australia's meteorite impact structures." University of Western Australia. School of Earth and Geographical Sciences, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0053.

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[Truncated abstract. Please see the pdf version of the abstract for the complete text.] Thirty impact structures of confirmed or possible status are currently identified in Australia. Twenty-two of these structures are confirmed by the presence of meteorite fragments or shock metamorphic features that are diagnostic of meteorite impact. The remainder have an impact origin supported by strong secondary evidence. New impact structures are being discovered in Australia at a rate of about one every year, with geophysics a key tool in the identification of candidate structures for further investi

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30

Matilda, Palo. "Evaluation of the applicability of geophysical methods when characterizing mine waste in Yxsjöberg, Sweden." Thesis, Luleå tekniska universitet, Geovetenskap och miljöteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82837.

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Smaltjärnen tailings repository located in Yxsjöberg, Sweden, attracts researchers with questions regarding characterization and potential re-mining. This thesis continuous geophysical characterization done by researchers from the Exploration Geophysics department at Luleå University of Technology but using new data from 2019. Geophysical methods used were self potential (SP), direct current resistivity (DCR), induced polarization (IP), and ground-penetrating radar (GPR). SP data were collected using a fixed base procedure and equipment from EMIT. Data were processed in MATLAB and presented in

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31

Graf, Kateryna Verfasser], Michael [Akademischer Betreuer] [Herty, and Martin [Akademischer Betreuer] Bücker. "Optimization methods for mathematical models for geophysical flows / Kateryna Graf ; Michael Herty, Martin Bücker." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1238791239/34.

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32

Tsang, Wing-shing. "Borehole geophysics limitations of natural gamma and gamma-gamma density logging methods." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B42577238.

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33

Garvey, Ryan J. "A study of unstable rock failures using finite difference and discrete element methods." Thesis, Colorado School of Mines, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3557944.

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<p> Case histories in mining have long described pillars or faces of rock failing violently with an accompanying rapid ejection of debris and broken material into the working areas of the mine. These unstable failures have resulted in large losses of life and collapses of entire mine panels. Modern mining operations take significant steps to reduce the likelihood of unstable failure, however eliminating their occurrence is difficult in practice. Researchers over several decades have supplemented studies of unstable failures through the application of various numerical methods. The direction of

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34

Theander, Astrid. "Mapping of contaminant dispersion from a polluted mining area by geochemical and geophysical methods, Rävlidmyran,northern Sweden : Use of geochemical and geophysical studies to investigate contaminants." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73634.

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After open pit mining, the pit can either be backfilled or be filled with groundwater andbecome a pit lake. These lakes tend to be acidic and contains high concentrations ofmetals, which increases the environmental risks in the area. One of these pit lakes isRävlidmyran in the Skellefte ore district. This problem and this pit lake have created thepurpose of this thesis, which is to compare the different water types connected to an openpit, i.e. groundwater, surface water and the actual pit lake water, and to connect the waterwith geophysical readings. The purpose is also to compare ratios betw

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35

McElroy, William John. "Development of geophysical mapping and data processing methods applied to base metal ore deposits in Ireland." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296823.

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36

Horobin, Richard. "The use of geophysical methods in defining the fracture characteristics and hydraulic mechanisms in the chalk." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325130.

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37

Sibley, Ralph Derek. "The investigation of near-surface cavities and associated features by soil gas geochemical and geophysical methods." Thesis, University of Exeter, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328486.

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38

MacNeil, Richard Eric. "Geophysical investigations and groundwater modeling of the hydrologic conditions at Masaya Caldera, Nicaragua." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001659.

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39

Stevenson, Frederick. "Response of the Black Mountain, South Africa, sulfide deposit to various geophysical techniques and implications for exploration of similar deposits." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/558021.

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40

Cárdenas, Chapellín Julio José. "Inversion of geophysical data by deep learning." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS185.

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Cette thèse présente la caractérisation d’anomalies magnétiques par des réseaux de neurones convolutifs, et l’application d’outils de visualisation pour comprendre et valider leurs prédictions. L’approche développée permet la localisation de dipôles magnétiques, incluant le comptage dunombre de dipôles, leur position géographique, et la prédiction de leurs paramètres (moment magnétique, profondeur, et déclinaison). Nos résultats suggèrent que la combinaison de deux modèles d’apprentissage profond, "YOLO" et "DenseNet", est la plus performante pour atteindre nos objectifs de classification et d

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41

Ahmad, Khalid. "Investigating the source of thermal anomalies in the northern United Arab Emirates (UAE) desert using geophysical methods." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Ahmad_09007dcc807ad423.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2010.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed June 30, 2010) Includes bibliographical references (p. 129-135).

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42

Kalisperi, Despina. "Assessment of groundwater resources in the north-central coast of Crete, Greece using geophysical and geochemical methods." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/4241.

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The Geropotamos aquifer on the north‐central coast of Crete, Greece, is invaded in some places by salt water from the Aegean Sea, with impact on freshwater supplies for domestic and business uses, including agriculture. The geological setting of the study area is considered complex, as Miocene biogenic limestones, marls, clays and conglomerates crop out in the central and the western part and clastic limestones and dolomites of the Tripolis and Plattenkalk nappe (the bedrock) in the eastern part of the study area. The phyllitequartzite nappe (which forms the oldest rock of the study area) lays

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43

Klingler, Stefan [Verfasser]. "Combination of geophysical and hydrogeological methods for the targeted assessment of fine-grained valley fills / Stefan Klingler." Tübingen : Universitätsbibliothek Tübingen, 2021. http://nbn-resolving.de/urn:nbn:de:bsz:21-dspace-1182889.

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44

Ongetta, Stephan. "Identification of Saline Groundwater and the Hydrogeochemistry in Highland of Ba’kelalan Region Using Geophysical and Chemical Methods." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/82586.

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The communities at Ba’kelalan of Sarawak have been using saline groundwater for commercial salt production. The study infers that there is an increase in salinity of groundwater with respect to season affecting the amount of salt production. Based on the results of the geochemical and geophysical studies, the source of the existing well water is mainly due to the dissolution of brine and they are connected through a fault system reaching the shallow levels.

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45

Zarroug, Moundheur. "Asymptotic methods applied to some oceanography-related problems." Doctoral thesis, Stockholm : Department of Meteorology, Stockholm University, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-37763.

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Diss. (sammanfattning) Stockholm : Stockholms universitet, 2010.<br>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Manuscript.

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46

Sheffer, Megan Rae. "Forward modelling and inversion of streaming potential for the interpretation of hydraulic conditions from self-potential data." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/235.

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The self-potential method responds to the electrokinetic phenomenon of streaming potential and has been applied in hydrogeologic and engineering investigations to aid in the evaluation of subsurface hydraulic conditions. Of specific interest is the application of the method to embankment dam seepage monitoring and detection. This demands a quantitative interpretation of seepage conditions from the geophysical data. To enable the study of variably saturated flow problems of complicated geometry, a three-dimensional finite volume algorithm is developed to evaluate the self-potential distributio

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47

Weiss, Matthew. "Evaluation of Geophysical and Thermal Methods for Detecting Submarine Groundwater Discharge (SGD) in the Suwannee River Estuary, Florida." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3811.

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Submarine groundwater discharge (SGD) represents a significant portion of the total discharge from coastal aquifers through diffuse seepage and point source springs, but can be difficult to locate. SGD is important as it can be a source of nutrients to estuaries and other coastal ecosystems. In an effort to evaluate geophysical and thermal methods for detecting SGD on the Florida Gulf coast, a suite of water-borne surveys were run in conjunction with aerial thermal imagery over the lower Suwannee River and estuary in March and September 2005. Thermal imagery exploits temperature differences be

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48

Kiflu, Henok Gidey. "Optimized Correlation of Geophysical And Geotechnical Methods In Sinkhole Investigations: Emphasizing On Spatial Variations In West-Central Florida." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4709.

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Abstract Sinkholes and sinkhole-related features in West-Central Florida (WCF) are commonly identified using geotechnical investigations such as standard penetration test (SPT) borings and geophysical methods such as ground penetrating radar (GPR) and electrical resistivity tomography (ERT). Geophysical investigation results can be used to locate drilling and field testing sites while geotechnical investigation can be used to ground truth geophysical results. Both methods can yield complementary information. Geotechnical investigations give important information about the type of soil, groundw

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49

Jungmann, Matthias Verfasser], Christoph [Akademischer Betreuer] [Clauser, Thomas Akademischer Betreuer] Berlage, and Benjamin [Akademischer Betreuer] [Berkels. "Interpretation of Geophysical Data with Higher-Level Image Processing Methods / Matthias Jungmann ; Christoph Clauser, Thomas Berlage, Benjamin Berkels." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1162503335/34.

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50

Derie, Bereket Mebrahtu. "Integration of geophysical methods for groundwater exploration in hard rock areas : application to Alla Valley, Eritrea, NE Africa." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/12616.

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The integrated use of Electromagnetic Ground Conductivity, Ground Electrical Resistivity and Seismic Refraction geophysics methods was made in Alia valley, Eritrea for the aim of developing a methodology best suited for ground water exploration in hard rock areas with limited professional and financial resources. A total area of 25 square kilometer was covered with the geophysical surveys. The effective use of information from wells and geological information from outcrops and existing literature helped to create a preliminary conceptual hydrogeologic model that in turn provided a general pict

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