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Tytuł:
Settlement of a historic building due to seepage-induced soil deformation
Osiadanie zabytkowego budynku w wyniku deformacji filtracyjnych gruntu
Autorzy:
Popielski, Paweł
Bednarz, Bartosz
Majewski, Tomasz
Niedostatkiewicz, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/27312076.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
podłoże budowlane
filtracja
grunt
osiadanie budynku
deformacja filtracyjna
budynek zabytkowy
building subsoil
seepage
ground
building settlement
seepage-induced deformation
historic building
Opis:
The research paper reviews issues associated with the impact of groundwater flow on soil characteristics and parameters, hence, the entire structure of a building set on it. Water seepage through the ground, building subsoil or structural elements of buildings made of soil affects the soil skeleton and may lead to changes in the arrangement of individual grains relative to each other, i.e., a modified soil structure. Soil solid phase (soil skeleton) deformations resulting from seepage forces are called seepage-induced deformations. The article characterizes typical seepage-induced deformations and specifies a criterion defining the beginning of the phenomenon. The case study involved using data on cracks and deformations in a historic building, as well as water seepage in its subsoil. Seepage was analysed, and zones where the seepage process initiation criterion was exceeded, were determined based on subsoil water level monitoring data. The determined zones coincide with the location of building cracks and scratches and confirm the possible cause behind building damage.
W artykule dokonano przeglądu zagadnień związanych z wpływem przepływu wód gruntowych na właściwości i parametry gruntu, a tym samym na całą konstrukcję posadowionego na nim budynku. Filtracja wody przez grunt, podłoże budowlane lub elementy konstrukcyjne budowli wykonanych z gruntu oddziałuje na szkielet gruntu i może prowadzić do zmian w układzie poszczególnych ziaren względem siebie, czyli do modyfikacji jego struktury. Odkształcenia szkieletu gruntowego wynikające z działania sił filtracji nazywane są deformacjami filtracyjnymi. W artykule scharakteryzowano typowe deformacje wywołane filtracją wody w gruncie oraz podano kryterium określające moment pojawiania się danego zjawiska. W studium przypadku wykorzystano dane dotyczące spękań i odkształceń w zabytkowym budynku oraz filtracji wody w jego podłożu. Na podstawie danych z monitoringu poziomu wody gruntowej przeanalizowano przepływ wód podziemnych i wyznaczono strefy, w których przekroczone zostało kryterium inicjacji procesu sufozji. Wyznaczone strefy pokrywają się z lokalizacją pęknięć i zarysowań budynku i potwierdzają możliwą przyczynę jego uszkodzenia.
Źródło:
Archives of Civil Engineering; 2023, 69, 2; 65--82
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of empirical equations for seepage estimation in comparison with observed losses from irrigation canals
Autorzy:
Syed, Naeem S.B
Shuqi, Zhao
Powiązania:
https://bibliotekanauki.pl/articles/27312639.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
empirical equation
equation modification
seepage estimation
seepage loss
seepage rate
Opis:
This study analyses and presents a technical comparison of seepage estimation from 11 empirical equations with measured seepage losses by the inflow-outflow method from two lined and unlined secondary irrigation canals sub-divided into different reach lengths. A significant margin of error was observed between empirical and inflowoutflow methods, hence modifications in empirical equations were performed. Results reveal that the average seepage losses observed in unlined and lined canals by inflow-outflow method were 9.15 and 3.89%, respectively. Moreover, only the Chinese equation estimated seepage losses for an unlined canal as similar to observed losses (0.11 m3 ∙s-1) whereas the Indian equation estimated similar results for a lined canal to those observed in the field (0.09 m3∙s-1). However, the rest of empirical equations were modified in accordance with error percentage with regard to the observed losses. The empirical equations were then observed to estimate reliable results of seepage.
Źródło:
Journal of Water and Land Development; 2023, 57; 21--29
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of seepage time curve in the assessment of flood embankment tightness
Autorzy:
Sroka, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2174338.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
flood protection system
levee
seepage
time of seepage
Opis:
Flood embankments have played an important role in flood protection systems for centuries. Tightness evaluation of water structures should result in determining whether floods may cause seepage incidents, consequently leading to their damage or even destruction. It is assumed that the time of water passage from the river to the protected area under steady-state conditions can be a good indicator of the embankment resistance to long-term water rise. The curve of water passage times shows the values obtained at different ordinates of the dammed water and can be regarded as a characteristic parameter of flood embankment tightness. Determination of the water passage time (Tp) additionally requires finding the trajectory along which this time is the shortest possible. However, there is no need to analyse the unsteady filtration, which requires the determination of an initial condition and the course of time-dependent boundary conditions. Engineers in practice, often use the time Tpp which elapses from the beginning of flooding to the occurrence of seepage in the protected area. The relationship between the passage time (Tp) and the seepage onset time (Tpp) was analysed on a model example. Practical use of the curve of passage times is showed on the example of the reconstruction of the left-bank Warta embankment in the area of Konin.
Źródło:
Journal of Water and Land Development; 2022, 54; 154--159
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of outlier observations in piezometric measurements: a case study in the Southern Region of Poland
Autorzy:
Lach, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/2055775.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
dam
outlier observations
safety
seepage
piezometer
Opis:
One of the main modes of monitoring the geotechnical conditions of earth dams is piezometric measurement, which measures water levels in an open piezometer or water pressure in a closed piezometer. During piezometric measurements, various types of factors can cause disturbances in these measurements that take the form of systematic, accidental, or obvious mistakes. Before measurements from open or closed piezometers are analyzed, outliers due to coarse errors should be detected and rejected. Such observations may significantly influence the result of the analysis and cause erroneous assessment and interpretation of the phenomenon studied. To do this, statistical tests must be applied so that the doubtful measurement can be accepted or rejected at the assumed significance level. This paper uses five statistical tests for identifying and rejecting outliers: the Q-Dixon test, the Grubbs test, as well as the Hampel test, the Iglewicz and Hoaglin test, and the Rosner test. The aim of this article is to try to identify the most suitable test for periodic piezometric measurements. The scope of the study includes the analysis of piezometric measurements for the Czaniec Dam for the multi-year period 2017–2020.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 1; 95--116
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application research of high pressure jet grouting pile in an underground engineering in Vietnam
Autorzy:
Nguyen, Xuan Loi
Wu, Li
Nguyen, Khanh Tung
Bui, Quang Anh
Powiązania:
https://bibliotekanauki.pl/articles/231234.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ciśnienie wysokie
pal jet grouting
podstawa pala
odkształcenie
fundament
kontrola przesączania
efekt wzmocnienia
high pressure
jet grouting pile
pile principle
deformation
foundation
seepage control
reinforcement effect
Opis:
High-pressure jet grouting pile is a kind of stratum reinforcement technology developed in recent years. Due to its characteristics of high solid strength, fast construction, low noise, safety and reliability, low cost, controllable reinforcement diameter, strong adaptability to stratum, and good reinforcement effect for soft soil, loose soil and water-rich stratum, high-pressure jet grouting pile technology has been more and more widely used in foundation treatment, water stop, and seepage prevention, tunnel lining and other fields in recent years. As a country with a relatively late development of underground construction engineering, Vietnam has little research on special geotechnical reinforcement technology, especially on special geotechnical reinforcement technology around urban underground construction engineering, especially on its theoretical analysis and practical application. Therefore, this thesis combines the Vietnam Trung Hoa tunnel project as an example, using the theoretical calculation formula and field monitoring measurement comparing the two methods, the high pressure jet grouting pile system research in Vietnam in the underground engineering reinforcement principle and application effect, get to the actual engineering design and construction has a guiding significance to the research, provides the reference for future similar projects. Finally, the application effect of high-pressure jet grouting pile in underground building reinforcement project is evaluated, which proves that high-pressure jet grouting pile has good applicability and economic benefit in underground building reinforcement project in Vietnam.
Źródło:
Archives of Civil Engineering; 2020, 66, 3; 575-593
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydraulic Characterization of a Self-Weight Compacted Coal
Autorzy:
Federico, Antonio Mario
Bottiglieri, Osvaldo
Cafaro, Francesco
Elia, Gaetano
Powiązania:
https://bibliotekanauki.pl/articles/178305.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
environmental engineering
seepage
coal stocks
unsaturated soils
porous-media characterisation
mining issues
environmental issues
Opis:
Water infiltration through coal stocks exposed to weather elements represents a key issue for many old mining sites and coal-fired power plants from the environmental point of view, considering the negative impact on human health of the deriving groundwater, soil and air pollution. Within this context, the paper investigates the hydraulic behaviour of a self-weight compacted unsaturated coal mass and its impact on the numerical prediction of infiltration induced by rainfall events. In particular, the work focuses on the experimental investigation carried out at different representative scales, from the grain scale to physical modelling. The material, when starting from uncompacted conditions, seems to be characterized by metastable structure, which tends to collapse under imbibition. In addition, direct numerical predictions of the seepage regime through a partially saturated coal mass have been performed. As the compaction of the coal stock induced by dozers has not been taken into account, the numerical simulations represent a conservative approach for the assessment of chemical pollution hazard associated to water infiltration into a real stockpile under operational conditions.
Źródło:
Studia Geotechnica et Mechanica; 2020, 42, 1; 48-60
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and experimental modelling of slope stability and seepage water of earthfill dam
Autorzy:
El-Hazek, Alaa N.
Abdel-Mageed, Neveen B.
Hadid, Mohammed H.
Powiązania:
https://bibliotekanauki.pl/articles/947129.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
earthfill dam
finite element modelling
GeoStudio
seepage
slope stability
Opis:
In this paper, finite element modelling is employed for simulating and analysing seepage and slope stability of earthfill dam via GeoStudio software. Two products are employed, which are SLOPE/W for slope stability and SEEP/W for seepage analysis. The behaviour of earthfill dam with four different types of sandy soils having different values of hydraulic conductivity (K) has been studied. Different upstream (US) slopes of 1:2, 1:2.5, 1:3 and 1:3.5 for the earthfill dam are simulated. The downstream (DS) slope is constant at 1:2. The results showed for all the four types of soils that when the US slope is increased, the amount of seepage from the dam increases and the factor of safety (F) decreases. For each US slope, when K (type of soil) increases, both seepage and F increase. Fine sand soil is associated with less seepage and less F. Sixteen equations are obtained to predict both seepage and F with respect to US slope for each type of soil and K of the soil for US slope. An experimental model for earthfill dam is constructed in the laboratory of hydraulics, Benha University to investigate the seepage of water through earthfill dams. It is concluded that seepage decreased when K decreased, and when the US slope for each type of soil decreased. The seepage increased when K increased for each US slope. Seven equations are obtained to predict seepage with respect to US slope for each type of soil, and K for each US slope.
Źródło:
Journal of Water and Land Development; 2020, 44; 55-64
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt
Autorzy:
Liu, Defeng
Zhang, Zhenyue
Chi, Ruan
Powiązania:
https://bibliotekanauki.pl/articles/110849.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
seepage mechanism
weathered crust elution-deposited rare earth ores
in-situ leaching
magnesium salt
Opis:
To reveal seepage mechanism during in-situ leaching process of weathered crust elution deposited rare earth ores with magnesium salt, the effects of particle gradation, particle migration, Atterberg limit on the permeability coefficient were investigated, and the relation between the particle size and rare earth content was discussed. The results showed that the ore in the humic layer (HL) with high porosity and permeability was uniformly graded particles. The ore in the completely weathered layer (CWL) with low porosity and permeability belonged to dense-graded particles. The ore in the partly weathered layer (PWL) was open-graded particles, whose permeability fell in between the HL and the PWL. The change of -0.075mm particles content was the largest in the leaching process. When - 0.075mm particle content was less than 30%, the migration ability of fine particles and the permeability coefficient decreased gradually. On the contrary, the migration ability of fine particles gradually remained stable, and the change in the permeability coefficient was not obvious. The liquid limit (LL) in the Atterberg limit of HL, CWL and PWL was inversely proportional to the permeability coefficient, and followed the order: LLHL < LLPWL < LLCWL. With the -0.075mm particle content increasing, the LL of the ore samples increased gradually and finally tended to be stable. The peak value of rare earth concentration appeared earlier and the rare earth content decreased gradually with the increase of the ore particle size. This work provided a theoretical basis for achieving high-efficient mining of weathered crust elution-deposited rare earth ores.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 2; 350-362
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Simulation of Groundwater Level Changes: a Case Study of the Struzyna Reservoir
Symulacje numeryczne zmian wód gruntowych na przykładzie zbiornika Strużyna
Autorzy:
Nieć, Jakub
Zawadzki, Paweł
Kaluża, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1811748.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
HYDRUS 2D/3D
seepage velocity
low-permeability blanket
prędkość filtracji
warstwa uszczelniająca
Opis:
The article presents the results of a simulation of groundwater flow in the near vicinity of a small storage reservoir, Strużyna. The calculations of water flow in the porous area were conducted using HYDRUS 2D/3D software. The extent of the reservoir’s influence on the groundwaters in steady flow conditions was determined. The results were compared with field monitoring data. The field measurements confirmed the negligible impact of precipitation on groundwater level. It was found that the permeability of bottom reservoir has a significant impact on the extent of the reservoir influence. Increasing the groundwater level with simultaneously removal of low permeable soil created a flood risk to buildings near the reservoir. As a result the probable cause of fundament inundation in the near vicinity was indicated.
W artykule przedstawiono wyniki symulacji przepływu wód gruntowych w pobliżu niewielkiego zbiornika retencyjnego Strużyna. Obliczenia przepływu wody w obszarze porowatym przeprowadzono za pomocą oprogramowania HYDRUS 2D/3D. Określono zasięg oddziaływania zbiornika na wody gruntowe w warunkach stałego przepływu. Wyniki zostały porównane z pomiarami terenowymi, wskazały m.in. pomijalny wpływ deszczu na poziom wód gruntowych. Stwierdzono, że poziom uszczelnienia dna zbiornika ma istotny wpływ na wody gruntowe w jego otoczeniu. Zwiększenie poziomu piętrzenia przy jednoczesnym usunięciu z dna i ścian bocznych zbiornika gruntów o niskiej przenikalności stworzyło zagrożenie podtopieniem dla budynków zlokalizowanych w pobliżu zbiornika. W rezultacie wskazano prawdopodobną przyczynę zalania fundamentów w najbliższym otoczeniu.
Źródło:
Rocznik Ochrona Środowiska; 2019, Tom 21, cz. 1; 141-156
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seepage and Slope Stability Analysis of Earthen Dam: A Case Study of Koga Dam, Ethiopia
Autorzy:
Zewdu, Amanuel
Powiązania:
https://bibliotekanauki.pl/articles/1076666.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Finite element method
PLAXIS 2D
Seepage
Stability analysis
Opis:
Evaluations of an earth-fill dam throughout its service life must ensure the stability of it against seepage and slope failure. This study presents the seepage and slope stability of the Koga earth-fill dam. The analyses were carried out using a finite element based PLAXIS 2D software, and covers the whole dam body; including 20 m of foundation depth. The behavior of both the body and the foundation of the dam were described using the Mohr-Coulomb criterion. Assessments of safety factor and quantity of seepage through the main body of the dam and foundation were carried out at different critical loading conditions. In this study, seepage analysis was undertaken of flow rate, pore water distribution and location of phreatic line. Additional actual field data measurements and observatory investigation were also carried out. From the simulated results, the average flow rate of seepage for the entire length of the body of the dam at normal pool level was equal to 0.06085 m3/s, whereas the figure for that through the foundation of the dam was 0.01937 m3/s. Moreover, total seepage through the main body of the dam at the current reservoir level was 0.04982 m3/s, while the actually measured quantity of seepage accumulated at the downstream toe of the dam was 0.04644 m3/s. The simulated and measured seepage discharges are 93.2 % similar. Based on the result of this study, the resulting factor of safety values during end of construction, steady state condition and rapid drawdown condition were 1.6221, 1.6136 and 1.2199, respectively. Using recommended design standards: United States army corps of engineers (USACE), British dam society (BDS) and Canadian dam association (CDA), the slope stability analysis of the Koga earth dam at all critical loading conditions are safe.
Źródło:
World News of Natural Sciences; 2019, 26; 191-217
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical 3D simulations of seepage and the seepage stability of the right-bank dam of the Dry Flood Control Reservoir in Racibórz
Autorzy:
Strzelecki, T.
Uciechowska-Grakowicz, A.
Strzelecki, M.
Sawicki, E.
Maniecki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/178251.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
seepage
3D simulation
anisotropy
gravel columns
Opis:
This article presents the results of numerical simulations of seepage through the body of the dam and the reservoir bed. The purpose of this study was to analyse the seepage stability during a flood as well as the impact on seepage stability of the diaphragm wall and gravel columns, on which the dam body is founded in selected segments. Simulations were conducted for three different locations, and the following 3D models of the dum were prepared: – a model containing the front and right-bank part of the dam, for which no diaphragm wall, gravel columns and drainage ditch were provided for – a model of a segment of the right-bank dam including a diaphragm wall, drainage ditch and gravel columns under the dam (two variants with differing diaphragm wall lengths) – a model of the water dam segment accounting for gravel columns and a drainage ditch, but without a diaphragm wall. In the case of founding on gravel columns, the base was modelled as an anisotropic medium in terms of seepage properties, macroscopically equivalent to the actual soil medium. The numerical model utilises the finite element method. The geometry of the dam and geological substrate was defined in the GIS tools in the form of a 3D model of the terrain and geology of the substrate.
Źródło:
Studia Geotechnica et Mechanica; 2018, 40, 1; 11-20
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental Flood Protection Dikes
Autorzy:
Ganiron Jr., Tomas U.
Powiązania:
https://bibliotekanauki.pl/articles/1113827.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Backwater
dike
dike crest
expressway dike
flood
flood level
freeboard
lakeshore
landslide
seepage
Opis:
Flooding is a natural event that replenishes the groundwater and revitalizes the soil through the deposit of sediments. However, when communities settle within floodplains, flooding can cause adverse social, economic and environmental impacts. Flood protection works, such as dikes, can further reduce flood risk. These structures particularly relevant in protecting historic communities that were settled before floodplain management policies were implemented. However, it is technically and economically impossible to completely eliminate flood risk with dikes. During severe floods, dike failures may occur due to erosion, overtopping or seepage. This study predicts that dike construction may lead to water level lowering for in-bank flows and to water level increases for out-of-bank (flood) flows. This confirms that, in principle, the existing Pampanga dike and specifically on the construction of Taguig City dike along the Laguna Lake may have contributed to the observed flood water level trends in the Metro Manila.
Źródło:
World News of Natural Sciences; 2017, 13; 82-100
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nieprawidłowości przy ocenie czasu przesączania zanieczyszczeń przez strefę aeracji na podstawie formuł obliczeniowych stosowanych w praktyce hydrogeologicznej
Anomalies in the assessment of pollution seepage time through the vadose zone based on formulas used in hydrogeological practice
Autorzy:
Liszkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/2075595.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
strefa aeracji
czas przesączania
błędy obliczeniowe
vadose zone
seepage time
calculation errors
Opis:
Polish practitioners of hydrogeology normally use the formulas by either Bindeman, Bindeman as modified by Macioszczyk or by Bachmat and Collin to calculate the time of seepage of conservative pollutants through the vadose zone. These calculations require the knowledge of several hydrogeological parameters (coefficient of vertical permeability, effective porosity, volumetric humidity, intensity of filtration), and the lithology and thickness of the vadose zone. The results obtained depending on the formula used vary considerably, even by more than 1 order of magnitude, which results in differences in technical recommendations for water protection formulated on their basis, and thus has impact on the costs of this protection. Moreover, this variability of results negatively affects the credibility of hydrogeological studies, enhancing the possibility of manipulating the output values. Credibility of calculations depends essentially on two factors: choice of formula, as each has its drawbacks and restrictions, and correctness of the adopted calculation parameters, which are often only unverified estimates. The paper analyzes the most common mistakes and their impact on the calculated seepage time. The author signals the need further theoretical and practical studies (including fieldwork and laboratory testing using modeling methods) of this problem. Research on the vadose zone should be one of the primary topics pursued, as risks of pollution in this zone results in the quality of water occurring below.
Źródło:
Przegląd Geologiczny; 2017, 65, 11/1; 1109--1014
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of old ecological hazards, oil seeps and contaminations using earth observation methods : spectral library for oil seep
Autorzy:
Smejkalová, E.
Bujok, P.
Pikl, M.
Powiązania:
https://bibliotekanauki.pl/articles/205040.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
remote sensing
oil contaminations
hydrocarbon seepage
spectral library
satellite
Opis:
The possibilities of remote sensing techniques in the field of the Earth surface monitoring and protection specifically for the problems caused by petroleum contaminations, for the mapping of insufficiently plugged and abandoned old oil wells and for the analysis of onshore oil seeps are described. Explained is the methodology for analyzing and detection of potential hydrocarbon contaminations using the Earth observation in the area of interest in Slovakia (Korňa) and in Czech Republic (Nesyt), mainly building and calibrating the spectral library for oil seeps. The acquisition of the in-situ field data (ASD, Cropscan spectroradiometers) for this purpose, the successful building and verification of hydrocarbon spectral library, the application of hydrocarbon indexes and use of shift in red-edge part of electromagnetic spectra, the spectral analysis of input data are clarified in the paper. Described is approach which could innovate the routine methods for investigating the occurrence of hydrocarbons and can assist during the mapping and locating the potential oil seep sites. Important outcome is the successful establishment of a spectral library (database with calibration data) suitable for further application in data classification for identifying the occurrence of hydrocarbons.
Źródło:
Archives of Environmental Protection; 2017, 43, 1; 3-10
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relation between filtration and soil consolidation theories
Autorzy:
Strzelecki, T.
Strzelecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/178240.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
filtration
seepage
soil consolidation
underground water
Opis:
This paper presents a different, than commonly used, form of equations describing the filtration of a viscous compressible fluid through a porous medium in isothermal conditions. This mathematical model is compared with the liquid flow equations used in the theory of consolidation. It is shown that the current commonly used filtration model representation significantly differs from the filtration process representation in Biot’s and Terzaghi’s soil consolidation models, which has a bearing on the use of the methods of determining the filtration coefficient on the basis of oedometer test results. The present analysis of the filtration theory equations should help interpret effective parameters of the non-steady filtration model. Moreover, equations for the flow of a gas through a porous medium and an interpretation of the filtration model effective parameters in this case are presented.
Źródło:
Studia Geotechnica et Mechanica; 2015, 37, 1; 105-114
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 35

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