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Tytuł:
2D Electrical Resistivity Tomography interpretation ambiguity - example of field studies supported with analogue and numerical modelling
Autorzy:
Bania, G.
Ćwiklik, M.
Powiązania:
https://bibliotekanauki.pl/articles/184445.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
electrical resistivity tomography ERT
ambiguity
2D inversion
analogue modelling
numerical modelling
Opis:
Single Electrical Resistivity Tomography (ERT) survey was carried out in the Manor and Park Complex in Nowa Huta (Krakow Branice, Poland). It was applied at a small distance and parallel to the longer wall of a monumental building containing an empty 3 m deep basement. Analogue modelling was performed in order to recreate the field study at the proper scale. The laboratory set-up consisted of a water tank where electrodes were mounted to the particular plate, which rested on water surface. The basement model was made out of a non-conducting material. The default and robust inversions were tested and these variants were also considered with the use of numerical modelling. Laboratory experiments have confirmed that zones visible in the interpreted field section are caused by the influence of the building cellar located next to the survey line. Zones of this kind are additionally disturbed by the local geological structure. The experiment has pointed out, among others, that as the distance between the survey line and the underground body increases, the inversion results are still burdened by an object influence. Thus, similar situations can be verified with the use of analogue modelling presented in this paper or 3D numerical one.
Źródło:
Geology, Geophysics and Environment; 2013, 39, 4; 331-339
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new Triassic-Jurassic section in the southern part of the Holy Cross Mts. (Poland) implications for palaeogeography
Autorzy:
Kozłowska, M.
Barski, M.
Mieszkowski, R.
Antoszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059877.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
sedimentology
fluvial deposits
shallow marine deposits
Middle Jurassic transgression
dinoflagellate cysts
stratigraphy
electrical resistivity tomography
ERT
Opis:
Sedimentological, stratigraphical and geophysical studies across a new Triassic-Jurassic transition section in the Holy Cross Mts., Poland have revealed a large sedimentary hiatus embracing the entire latest Triassic–Early Jurassic – earliest Middle Jurassic time interval and yielded new data on the Triassic fluvial system and on Middle Jurassic shallow marine sedimentation. The presence of organic-walled dinoflagellate cysts allowed a precise age assignment of the black clay facies. Regional discussions and comparisons may be made with other areas with a similar depositional environment in Poland. For the first time a counterpart of the “Kościeliskie Beds” lithostratigraphic unit is proposed to exist in the Holy Cross Mts. area.
Źródło:
Geological Quarterly; 2016, 60, 2; 365--484
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrated approach for landslide hazard assessment: A case study of the Middle Dnieper Basin, Ukraine
Autorzy:
Ivanik, Olena
Fonseca, Joana
Shabatura, Oleksandr
Khomenko, Ruslan
Hadiatska, Kateryna
Kravchenko, Dmytro
Powiązania:
https://bibliotekanauki.pl/articles/2073724.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Dnieper River basin
electrical resistivity tomography
ERT
infrared thermography
IRT
landslide hazards
Opis:
Ukraine is characterised by active natural hazards processes within different structural, tectonic and landscape zones. In Middle Dnieper basin region mass movement processes have great impact on people’s livelihoods and infrastructure. These processes occur on the slopes with different geological structure. The determining causes include lithologic and stratigraphic conditions, hydrogeological regime, structural and textural peculiarities of rocks and the geomorphology of the slopes. Landslide inventory database has been developed based on long-term observations of more than 400 landslides and landslide-prone areas. This paper takes efforts forward by combining different geological and geophysical methods to advance the current understanding of landslide phenomena and contributing towards a better informed assessment of landslide hazard and risk. The developed methodology is implemented in a test sites of Kyiv region, covering an area of 18.3 km2 situated in the Middle Dnieper basin. Electrical Resistivity Tomography, Self-Potential and Infrared Thermography techniques were employed to investigate the lithostratigraphic sequences, the geometry of landslide body and potential mass movement. The results presented here confirm the potential of using an integrated approach that combines different field data to better plan mitigation activities and measures for the effective land management. This study will be useful in increasing the safety aspects of the infrastructures and lives and also for planning of research and developmental activities.
Źródło:
Journal of Water and Land Development; 2022, 52; 81--86
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza porównawcza wyników badań geofizycznych i geologiczno inżynierskich na potrzeby ustalania modelu geologicznego – na przykładzie poligonu badawczego Kępa Włocławska
Comparative analysis of the results of geophysical and geological- -engineering methods on the example of Włocławek River-islet investigative testing ground
Autorzy:
Gańko, M.
Mieszkowski, R
Gańko, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075284.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
georadar
GPR
pionowe sondowanie elektrooporowe
VES
tomografia elektrooporowa
ERT
refrakcja
sejsmika
sondowania statyczne
CPT
ground penetrating radar
vertical electrical sounding
electrical resistivity tomography
refraction
seismics
cone penetration test
Opis:
The paper present the correlation of geophysical method with geological-engineering data. As an experimental testing ground, a terrain with simple soil conditions was selected, located on the W³oc³awek River-islet. This is a large alluvial area on the Vistula River, downstream of the W³oc³awek Dam. In the study, the following geophysical methods were applied: vertical electrical sounding (VES), refraction seismic, ground penetrating radar (GPR) and electrical resistivity tomography (ERT). The evaluation of geological-engineering conditions was executed by using the following methods: drilling, cone penetration test (CPT sounding), measurements of the underground water level and macroscopic and laboratory analyses of soils samples. The results obtained were described and presented in a graphic form.
Źródło:
Przegląd Geologiczny; 2015, 63, 2; 121--130
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of electrical resistivity tomography in assessing complex soil conditions
Autorzy:
Kowalczyk, S.
Zawrzykraj, P.
Mieszkowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2060284.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
electrical resistivity tomography
ERT
resistivity cone penetration test
RCPT
peat
Opis:
Appropriate assessment of spatial variation of soil and hydrogeological conditions is a crucial issue in recognizing foundation soil. The best methods to achieve this goal are those that supply continuous rather than scattered data on soil medium variation. Electrical resistivity was measured with the resistivity cone penetration test (RCPT) and electrical resistance tomography (ERT) with electrodes spaced at 1 and 3 m in order to discriminate peat layers beneath low-resistivity clays. Soil conditions determined by drillings and ERT were not concordant, therefore resistivity modelling of the medium was conducted based on geological units determined by drillings and values of apparent resistivity obtained from RCPT. The strata thickness and electrode spacing is shown to have influence on resistivity imaging in complex soil conditions.
Źródło:
Geological Quarterly; 2015, 59, 2; 367--372
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case study of electrical resistivity tomography measurements used in landslides investigation, Southern Poland
Autorzy:
Mita, M.
Glazer, M.
Kaczmarzyk, R.
Dąbrowski, M.
Mita, K.
Powiązania:
https://bibliotekanauki.pl/articles/100780.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
electrical resistivity tomography
ERT
numerical modelling
landslide
mass movements
elektryczna tomografia rezystywnościowa
modelowanie numeryczne
osuwisko
ruchy masowe
Opis:
Mass movements are an ever present threat to building construction, water management, vegetation formation and biodiversity. This paper presents an approach to landslides research based on non-invasive geoelectrical method - Electrical Resistivity Tomography (ERT). Mapping and displacement monitoring of unstable slopes is crucial for the hazards prevention and assessment. The ERT technique is an effective tool to obtain structural differentiation of geological medium through interpretation of 2D electrical resistivity models. The main advantage of the method is a wide range of applicability what makes its useful during field works on a landslide. It is commonly used for measurements of slope instability, determination of shear surface, landslide susceptibility, depth of bedrock, slip plane geometry. The aim of the work is to identify the geological structures underneath three selected landslides in south Poland: in Racibórz, Milówka and Porąbka. Attempts have been focused on determination of the usefulness of the proposed ERT methodology for evaluation of possible further development of mass movements. On two investigation sites two different arrays have been used: Wenner-Schlumberger and dipole-dipole which allowed to prepare combined data set and resistivity models based on them. Forward modelling of synthetic models based on a priori information allowed to understand anomalies present on resistivity models. Applied approach ensured quality increase of final interpretation of resistivity models.
Źródło:
Contemporary Trends in Geoscience; 2018, 7, 1; 110-126
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical resistivity tomography (ERT) and sedimentological analysis applied to investigation of Upper Jurassic limestones from the Krzeszowice Graben (Kraków Upland, southern Poland)
Autorzy:
Woźniak, T.
Bania, G.
Mościcki, W. J.
Ćwiklik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059759.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
electrical resistivity tomography
ERT
Upper Jurassic limestones
Oxfordian
Krzeszowice Graben
Southern Poland
Opis:
This paper highlights the application of shallow non-invasive geophysics (electrical resistivity tomography) supported by sedimentological analysis applied to the investigation, description and interpretation of Upper Jurassic limestones exposed in the abandoned quarry near the village of Tomaszowice (Kraków Upland, southern Poland). Within this site, on the northern margin of the Krzeszowice Graben, a facies diversity of Upper Jurassic limestones can be observed. Field exposures were analysed to broadly characterize these Upper Jurassic limestones in terms of facies and microfacies development. Three facies types, including pelitic limestones, bedded limestones and carbonate gravity-flow deposits, composed of numerous microfacies, have been distinguished. ERT study using a dipole-dipole array has been carried out, along 5 parallel 110 m long profiles and along a perpendicular 110 m long profile, north of the Tomaszowice Quarry wall. The use of ERT in combination with the geological data allowed characterization and description of the geology at the research site as well as the determination of the lithological composition and internal architecture of the subsurface. Furthermore, the ERT interpretation results indicated the presence of a series of a secondary faults closely linked with the Krzeszowice Graben. The distribution of the gravity-flow deposits reflects the fault zone pattern of the graben and Late Jurassic fault activity.
Źródło:
Geological Quarterly; 2018, 62, 2; 287--302
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland
Autorzy:
Pawlik, Ł.
Kasprzak, M.
Powiązania:
https://bibliotekanauki.pl/articles/294410.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
2D electrical resistivity tomography (ERT)
pit-and-mound microtopography
tree uprooting
Stołowe Mountains
Sudety
Opis:
This article presents results of geophysical analyses based on electrical imaging of slope mantles with pit-and-mound microtopography developed on the Rogowa Kopa hillslope in the Stołowe Mountains, SW Poland. The use of two dimensional electrical resistivity tomography (2D ERT) to non-invasive analyses of the hillslope microrelief allowed completing previous results of geomorphological and soil studies. The tomograms (inversion results) acquired across individual forms of treethrow pits and mounds can be interpreted according to regolith thickness and its wetness, but also smaller features such as relict and fresh tree root systems detected in the mounds. These features were compared to a general picture of geoelectrical resistivity measured in the main cross-section of the analyzed hillslope. The differences in slope cover characteristics observed on the tomograms confirm important role of the tree uprooting process in formation of some basic features of the regolith and soils, including their uneven redistribution across the hillslope.
Źródło:
Landform Analysis; 2015, 29; 41-47
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical resistivity tomography for geo-engineering investigation of subsurface defects: a case study of Etioro-Akoko highway, Ondo State, southwestern Nigeria
Autorzy:
Akingboye, Adedibu Sunny
Osazuwa, Isaac Babatunde
Mohammed, Muraina Zaid
Powiązania:
https://bibliotekanauki.pl/articles/2024721.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electrical resistivity tomography (ERT)
geo-engineering
deep weathered troughs
multiple fractures
pavement failure
highway
Etioro-Akoko
Opis:
The durability of roads is dependent on the proper screening of the variations in subsurface geological characteristics and conditions through geo-engineering investigations and good construction practices. In this study, electrical resistivity tomography (ERT) technique was used to investigate the subsurface defects and potential failures along the substrate of Etioro-Akoko highway, Ondo State, southwestern Nigeria. Results of the inverse model resistivity sections generated for the two investigated traverses showed four distinct subsurface layers. The shallow clayey topsoil, weathered layer, and partially weathered/fractured bedrock have resistivity values ranging from 4–150 ohm-m, 10–325 ohm-m, and 205–800 ohm-m, with thickness values of 0–2 m, 0.5–12.5 m, and less than few meters to > 24 m, respectively. The fresh bedrock is characterised by resistivity generally in excess of 1000 ohm-m. The bedrock mirrored gently to rapidly oscillating bedrock troughs and relatively inclined deep penetrating multiple fractures: F1–F’1, F2–F’2 and F3–F’3, with floater in-between the first two fractures. These delineated subsurface characteristic features were envisaged as potential threats to the pavement of the highway. Pavement failures in the area could be attributed to the incompetent clayey sub-base/substrate materials and the imposed stresses on the low load-bearing fractured bedrock and deep weathered troughs by heavy traffics. Anticipatory construction designs that included the use of competent sub-base materials and bridges for the failed segments and fractured zones along the highway, respectively, were recommended.
Źródło:
Studia Quaternaria; 2020, 37; 101-107
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ERT i GPR – geofizyczne metody badań podłoża wykorzystywane w budownictwie liniowym
Geophysical methods ERT and GPR of subgrade identification in road and railway engineering
Autorzy:
Maślakowski, M.
Józefiak, K.
Brzeziński, K.
Superczyńska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075727.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
obrazowanie elektrooporowe
ERT
mobilna metoda geofizyczna
GPR
geofizyczny test w terenie
electrical resistivity tomography
Ground Penetrating Radar
geophysical field tests
Opis:
Correct determination of subgrade layers and properties is fundamental for later design and construction stages. Results obtained using traditional geotechnical tests are always of an overly specific nature - information is only provided in certain points in the field. Number of test points and the accuracy of results’ interpretation among them influence the design of an engineering structure foundation, which greatly impacts the cost of a project. Also, the lack of soil testing or insufficient investigation of soil conditions can be the reason for all kinds of legal claims from contractors which often exceed the whole investment budget by several or even several dozen percent. In order to prevent that situation new directives for geotechnical testing include additional geophysical methods such as electrical resistivity tomography (ERT) and ground penetrating radar (GPR). These non-invasive methods can give a spatial image and thus improve the accuracy of soil strata identification. However, these methods have also disadvantages and inaccuracies related to the measurement principles and interpretation of the results. This paper presents limitations and possible errors of geophysical methods ERT and GPR based on example tests carried out for road and railway engineering structures.
Źródło:
Przegląd Geologiczny; 2017, 65, 10/2; 765--771
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geophysical exploration of castle remains in Barwałd Górny (near Kalwaria Zebrzydowska, Poland) using electrical resistivity tomography (ERT) with assistance of depth of investigation index (DOI) method
Autorzy:
Glazer, M.
Kula, D.
Saternus, R.
Lewicki, P.
Powiązania:
https://bibliotekanauki.pl/articles/100776.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
tomografia
ERT
archeologia
indeks DOI
metoda
electrical resistivity tomography
archeology
depth of investigation index
DOI
Opis:
In March of 2014 at ruins of the 14th century castle, situated at the top of Mount Żar in Małopolska region, Poland, geophysical surveys were performed. Surveys were planned to investigate remains of the castle that could remain in the ground. Electrical Resistivity Tomography method was used there. In the paper 4 sections have been presented. During interpretation, as the supporting method, maps of Depth-of-Investigation (DOI) index have been used. Results of the surveys can point out potential remains of the castle walls and ruins of buildings that were situated in the stronghold.
Źródło:
Contemporary Trends in Geoscience; 2014, 3, 1; 24-31
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identyfikacja systemu krążenia wód podziemnych na wyspie Wolin
Identification of groundwater flow system of the Wolin Island
Autorzy:
Gurwin, J.
Krawiec, A.
Powiązania:
https://bibliotekanauki.pl/articles/2062657.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
system krążenia wód
ingresja wód słonych
skład izotopowy wód podziemnych
modelowanie numeryczne
badania elektrooporowe
tomografia elektrooporowa
ERT
groundwater flow system
saltwater intrusion
groundwater isotopic composition
numerical modelling
resistivity research
electrical resistivity tomography
Opis:
W pracy przedstawiono wyniki badań modelowych i geofizycznych z obszaru wyspy Wolin. Wyniki obliczeń numerycznego modelu filtracji wykazały, że zasilanie wód podziemnych zachodzi głównie w północnej i centralnej części wyspy, zgodnie z wyniesieniem Pasma Wolińskiego (góra Grzywacz – 116 m n.p.m.). Układ krążenia jest dostosowany do bazy drenażu, którą stanowią: na północy Morze Bałtyckie, na wschodzie rzeka Dziwna, na zachodzie Świna, a na południu Zalew Szczeciński. Dopływ do obszaru badań jest lokalnie formowany w wyniku infiltracji wód powierzchniowych, co może mieć miejsce zwłaszcza w rejonach funkcjonowania dużych ujęć. Największa eksploatacja dotyczy rejonu Międzyzdrojów i Wolina oraz dwóch ujęć dla Świnoujścia w zachodniej części wyspy. Właśnie w zachodniej części wyspy (rejon ujęcia Odra) zachodzi infiltracja wód powierzchniowych z Zalewu Szczecińskiego/ Świny. Na podstawie przeprowadzonych badań elektrooporowych zlokalizowano strefy ascenzji i ingresji wód o podwyższonej mineralizacji. Zmniejszający się pobór wód podziemnych na tym obszarze w ostatnich kilkunastu latach oraz racjonalna gospodarka wodami słodkimi zmniejszyły stopień zagrożenia dopływem wód słonych w wyniku ingresji i ascenzji.
This paper presents the results of geophysical investigations and groundwater modelling from the Wolin Island. The simulation results of the numerical model have shown that groundwater recharge occurs mainly in the northern and central parts of the island (Mt. Grzywacz – 116 m a.s.l). The groundwater flow system is adapted to the base level of groundwater drainage, which is: Baltic Sea in the north, Dziwna River in the east, Świna River in the west, and the Szczecin Lagoon in the south. Inflow to the research area is locally formed as a result of infiltration of surface water, which may take place especially in the areas of operation of major groundwater intakes. The major water intakes are located in Międzyzdroje and Wolin, and additional two in the western part of the Wolin Island for supplying the town of Świnoujście. Just in this extreme western part of the island – within the area of groundwater intake Odra, surface water infiltrates into the shallow aquifer from the Szczecin Lagoon and Świna River. Based on the geoelectrical imaging there was located a salt water intrusion and ascension of highly mineralized water. A decrease in consumption of groundwater in this area in recent years and the rational management of freshwater resources reduced the level of risk as a result of ingression and ascension of saline water.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2012, 451 Hydrogeologia z. 13; 53--61
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping of the north-eastern part of kozłowicka buried valley based on geoelectrical data
Autorzy:
Topolewska, Sylwia
Stępień, Marcin
Kowalczyk, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/2025652.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
buried valley
geoelectrical methods
electrical resistivity tomography
ERT
Nauki o Ziemi
Opis:
The pa per is aim ing to de ter mi nate the ex tent of the north east ern arm of Koz³owicka bur ied val ley on the grounds of own re search by means of elec tri cal re sis tiv ity to mog ra phy – ERT and avail able ar chi val re searches. On the Hy drogeo log i cal map of Po land, ¯yrardów sheet (Felter and Nowicki, 1998a, b) Koz³owicka bur ied val ley was dif fer en tiated as an in di vid ual hydrogeological unit. The re sults of the anal y sis show that the ex tent of the struc ture, de fined by its up per bound ary, dif fers sig nif i cantly from the one sug gested on the sheet of Hydrogeological map of Po land. Since there was no data avail able in the north east ern part of the dis cussed arm of Koz³owicka bur ied val ley, the north ern bound ary was de fined only based on avail able geoelectrical sound ing pro files (Czerwiñska, 1988; Topolewska, 2015). In or der to con firm sug gested so lu tion, geoelectrical re search by means of elec tri cal re sis tiv ity to mog ra phy (ERT) was con ducted. The mea sure ments were per formed along 3 pro files lo cated in the area of in ter est. The au thors would like to point out the need of the us age of ERT in map ping and study ing bur ied struc tures that might be ground wa ter res ervoirs. As a re sult, one ob tains quasi-con tin u ous im age of elec tri cal re sis tiv ity of the subsurface. Due to the con trast of elec tri cal prop er ties of sed i ments, it is pos si ble to de ter mine up per and bot tom sur faces of bur ied struc tures, formed within gla cial de pos its.
Źródło:
Studia Quaternaria; 2016, 33; 91-101
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obraz fizyczny zwierciadła wód pierwszego poziomu wodonośnego w świetle badań metodą tomografii elektrooporowej (ERT)
Physical image of water table determined by the electrical resistivity tomography (ERT) method
Autorzy:
Gańko, M.
Mieszkowski, R.
Gańko, A.
Tuchołka, P.
Powiązania:
https://bibliotekanauki.pl/articles/2062264.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
metoda tomografii elektrooporowej (ERT)
oporność gruntu
poziom wody podziemnej
osady niskooporowe
electrical resistivity tomography ERT
soil resistivity
groundwater level
low-resistivity sediments
Opis:
W artykule przedstawiono i omówiono wyniki rozpoznania pierwszego poziomu wodonośnego za pomocą metody tomografii elektrooporowej (ERT). Wybrano trzy poligony badawcze w obrębie Warszawy, o różnej budowie geologicznej i odmiennych warunkach hydrogeologicznych. Jeden poligon znajduje się w obrębie wysoczyzny polodowcowej na terenie Warszawy („Pole Mokotowskie”), a dwa pozostałe są położone w obrębie doliny rzeki Wisły („Józefów” i „Tarchomin”). Poligony umiejscowione w obrębie doliny rzeki charakteryzują się m.in. swobodnym poziomem zwierciadła wody, natomiast w obrębie poligonu na wysoczyźnie polodowcowej występuje poziom wodonośny pod ciśnieniem. Rezultaty wykonanych badań dowodzą, że poziom wód podziemnych wyraźnie zaznacza się w obrazie uzyskanym metodą ERT, ale nie zawsze daje precyzyjne wyniki. Dokładność jego wyznaczenia zależy od uziarnienia gruntów, ich kontrastu opornościowego, wilgotności, metody profilowania elektrycznego oraz od ukształtowania stropu osadów niskooporowych (Warszawa – iły plioceńskie).
The paper presents the results and interpretation of Electrical Resistivity Tomography (ERT) study of the first aquifer. The study was carried out in the Warsaw region on three selected test fields with different geological structure and hydrogeological conditions: two in the Wisla River valley (“Józefów” and “Tarchomin”) and one in a postglacial upland in Warsaw (“Pole Mokotowskie”). The river valley aquifers are unconfined, whereas in the upland, the first aquifer is confined and under pressure. The results clearly show the presence of aquifers on the ERT image, but the positioning of the water level is not always precise. The precision depends on granulometry of sediments, resistivity contrasts, chosen method of resistivity measurement and morphology of low-resistivity sediments (e.g. Pliocene clays in the Warsaw area).
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2013, 456 Hydrogeologia z. 14/1; 167--172
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obrazowanie elektrooporowe warunków hydrogeologicznych strefy brzegowej wyspy Wolin
Geoelectrical imaging of hydrogeological conditions of the coastal zone of Wolin Island
Autorzy:
Pacanowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/2061773.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
metody geoelektryczne
mineralizacja wód
ingresja wód
tomografia elektrooporowa
ERT
geoelectrical methods
total dissolved solids (TDS)
water ingress
electrical resistivity tomography
Opis:
W artykule zaprezentowano problematykę złożonych warunków hydrogeologicznych w strefie brzegowej wyspy Wolin, które można obrazować za pomocą metod geoelektrycznych. Wody podziemne warstw wodonośnych strefy brzegowej znajdują się w stałym kontakcie z zasolonymi wodami morskimi. Fakt ten stanowi groźbę degradacji wód podziemnych i decyduje o specyfice ich ochrony. W utworach czwartorzędowych, na obszarach, gdzie wody podziemne wykazują niską mineralizację, wartości oporności utworów przepuszczalnych i nieprzepuszczalnych różnią się zdecydowanie, w związku z tym klasyfikacja hydrogeologiczna wyników, jakie otrzymujemy z pomiarów elektrooporowych nie stanowi problemu. Na obszarze prowadzonych badań sytuacja jest zupełnie inna i dużo bardziej skomplikowana, ze względu na ingresję słonych wód morskich do warstw wodonośnych. Co więcej, pośrednio mineralizacja ma również wpływ na oporności utworów słabo przepuszczalnych i praktycznie nieprzepuszczalnych.
The article discusses the problem of complex hydrogeological conditions in the coastal zone of Wolin Island in Poland. Hydrogeological situation of the island was imaged by geoelectrical methods. Groundwater of the coastal zone is in constant contact with the saline sea waters. This fact constitutes a threat of groundwater degradation and has an influence on the methods of groundwater protection. The resistivity of Quaternary permeable and impermeable deposits is significantly different in areas where groundwater is characterized by low values of total dissolved solids (TDS). This implies that hydrogeological classification of the results obtained from electrical resistivity tomography (ERT) is not difficult. In the study area, the situation is completely opposite and much more complicated because of salty sea water ingress into aquifers. This affects the resistivity values of permeable and impermeable deposits, obtained from geophysical tests.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2016, 466; 225--232
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 28

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