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Tytuł:
Seven Reasons Why Protists Make Useful Bioindicators
Autorzy:
Payne, Richard J.
Powiązania:
https://bibliotekanauki.pl/articles/763431.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Indicator, Biomonitoring, Environmental Sentinel, Protozoa, Algae
Opis:
To introduce the special issue this paper reviews the use of protists as bioindicators. Seven key advantages of protist bioindicators are highlighted, namely: environmental sensitivity, functional importance, distribution, size and numbers, response times, ease of analysis and preservation potential. Protist bioindicators have been used in a wide range of contexts from ecosystem restoration to fire history, and particularly environmental pollution. Most major protist groups have been used as bioindicators with diatoms, foraminifera and testate amoebae particularly widely studied. To increase uptake of protist bioindication techniques in routine environmental monitoring technique development should consider the needs of stakeholders from an early stage. Papers in this special issue reflect the diversity of both protist life and possible bioindicator applications.
Źródło:
Acta Protozoologica; 2013, 52, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crop production intensity and haNDVI indicator – amplitude of NDVI related to harvest
Autorzy:
Łopatka, Artur
Koza, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2147933.pdf
Data publikacji:
2020-11-30
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
remote sensing
NDVI
nitrogen fertilizers
Sentinel
MODIS
Opis:
In response to the growing needs of spatial recognition of the intensity of agricultural crop production, a new haNDVI indicator was developed, that measures the amplitude of the NDVI indicator related to the harvest. The proposed way of calculating haNDVI is to use the minimum and maximum functions for the raster layers set from the growing season. This avoids the need for preliminary classification of crops, including to determine the moment of harvest. It has been shown that the haNDVI indicator calculated on aggregated NDVI layers with a resolution of 1 km is correlated with soil quality indexes, NPK fertilization intensity (r = 0.69) and the share of crops in the total area (r = 0.86) for municipalities. The properties of the haNDVI indicator make it particularly useful for the initial, rapid scanning of environmental quality in terms of the intensity of plant production and indicating the hazards locations associated with the use of fertilizers and plant protection products.
Źródło:
Polish Journal of Agronomy; 2020, 42; 24-33
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Land Cover Changes and Impacts of Massive Siltation on the Mangrove Segara Anakan Lagoon System, Cilacap Indonesia
Autorzy:
Ardli, Erwin Riyanto
Yuwono, Edy
Purwanto, Anang Dwi
Powiązania:
https://bibliotekanauki.pl/articles/2173293.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sedimentation
livelihoods change
coastal
Sentinel
land use
Opis:
Changing coastal zones in Indonesia, such as coral reefs, seagrass, and mangroves, have an impact on tropical ecosystems. Excessive exploitation and sedimentation, in particular, have threatened the mangrove at Segara Anakan Cilacap. In order to evaluate temporal land cover changes and the impact of high siltation on the Segara Anakan lagoon system in Cilacap, Indonesia, a research was conducted. The land cover data from SPOT 4 was available in 2008, and the Sentinel-2A data was available in 2019. The Normalized Difference Vegetation Index (NDVI) was used to enhance the Macro Class with supervised classification utilizing Maximum Likelihood techniques. Mangroves and water bodies declined between 2009 and 2019, whereas settlements and farmland areas increased, according to this study. In the western part of Segara Anakan, extensive siltation altered the biomass, structure, and composition of mangrove vegetation. At high sedimented habitats, Acanthus and Derris dominate, followed by Nypa. The changes in land cover and land use had an impact on socioeconomic factors. Decreases in water bodies and mangrove areas, as well as an increase in farmland, were significantly linked to a shift in society’s livelihoods from fishermen to farmers. The destruction of mangrove habitats in the Segara Anakan has been accelerated by anthropogenic activity and population pressure. Because this sensitive environment is constantly threatened by anthropogenic activity and climate change, effective management of the Segara Anakan Lagoon mangrove ecosystem is important for its long-term viability.
Źródło:
Journal of Ecological Engineering; 2022, 23, 7; 29--41
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping and Assessment of Geological Lineaments with the Contribution of Earth Observation Data: A Case Study of the Zaer Granite Massif, Western Moroccan Meseta
Autorzy:
Zoraa, Noura
Raji, Mohammed
El Hadi, Hassan
Maimouni, Soufiane
Mhamdi, Hicham
Reddad, Aicha
Zahour, Ghalem
Ait-Yazza, Achraf
Powiązania:
https://bibliotekanauki.pl/articles/27314299.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
lineament extraction
Landsat 8
ASTER
Sentinel
Zaer
Opis:
The Zaer granitic massif is one of the most important Variscan granitoids in the Central Zone of the Western Moroccan Meseta. It is characterized by a deformation which is manifested by a network of fractures of different scales. Thanks to the technology currently available, many geological studies rely heavily on the mapping of geological lineaments, especially in structural geology. This has become more reliable with access to earth observation data using optical and radar sensors as well as the various remote sensing techniques. Therefore, the objective of this work is to determine the potential of Landsat 8, ASTER, Sentinel 2 and radar Sentinel 1 datasets using the automatic method to extract lineaments. Furthermore, this work focuses on quantitative lineament analysis to determine lineament trends and subsequently compare them with global and regional tectonic movement trends. The lineaments obtained through different satellite images were validated by including the shaded relief maps, the slope map, the correlation with the pre-existing faults in the geological maps as well as the field investigation. Comparison of these results indicates that Sentinel 1 imagery provides a better correlation between automated extraction lineaments and major fault zones. Thus, Sentinel 1 data is more effective in mapping geological lineaments. The final lineament map obtained from the VH and VV polarizations shows two major fault systems, mainly oriented NE-SW and NW-SE to NNW-SSE.
Źródło:
Geomatics and Environmental Engineering; 2023, 17, 5; 107--144
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Results of sentinel lymph node biopsy in patients with breast cancer in 10-year own material of the 4th Military Teaching Hospital with Polyclinic in Wrocław
Autorzy:
Kabziński, Piotr
Rac, Jacek
Dorobisz, Tadeusz
Pawłowski, Wiktor
Ziomek, Agnieszka
Chabowski, Mariusz
Janczak, Dawid
Leśniak, Michał
Janczak, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/1394134.pdf
Data publikacji:
2016
Wydawca:
Index Copernicus International
Tematy:
breast cancer
sentinel lymph node
radioisotope
lymphoscintigraphy
Opis:
At present, sentinel lymph node biopsy is a standard procedure to assess the advancement of breast cancer and cutaneous melanoma. The aim of the study was to assess the role of the sentinel lymph node biopsy in the treatment of patients with breast cancer in our own material. Material and methods. Analyzed was medical documentation of 258 patients with initially operable breast cancer, qualified for operation with sentinel lymph node biopsy in 2004-2014 in the Department of Surgery of the 4th Military Teaching Hospital. A few hours prior to the planned surgery, radioisotope (technitium-99 sulfur colloid) was applied in the area of tumor or under the areola. 1-2 hours after administering the tracer, the lymphoscintigraphy with the labelling of the sentinel lymph node on the skin was performed. Results. On the basis of the gathered material, obtained were the following parameters: sensitivity – 100%, and specificity – 94.6%. Four cases were false negative (5.5%). Conclusions. 1. Marking the sentinel lymph node in breast cancer, based on the single visualisation method with the use of radioisotope, is a useful and effective technique. 2. The factor influencing the results of the sentinel lymph node biopsy (true positive and negative results and false negative result) was the number of the excised lymph nodes except for the sentinel lymph node. 3. Patients with estrogen receptor expression had often metastases to sentinel lymph node (145 cases – 56%). 4. The false negative rate, i.e. 5.5% in our material, is within the limits of acceptability given in the literature. 5. The sentinel lymph node biopsy performed by the experienced surgical team is a reliable diagnostic tool with a low complication rate.
Źródło:
Polish Journal of Surgery; 2016, 88, 3; 130-135
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania dynamicznych zjawisk przemieszczeniowych z wykorzystaniem radarowych zobrazowań satelitarnych – Sentinel
Study of dynamic displacement phenomena with the use of imaging radars from the Sentinel mission
Autorzy:
Malinowska, A.
Witkowski, W.
Guzy, A.
Hejmanowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/395097.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
wstrząs pochodzenia górniczego
przemieszczenie pionowe
DInSAR
misja Sentinel
eksploatacja podziemna
mining induced tremors
vertical displacement
Sentinel mission
underground mining
Opis:
Zjawiska dynamiczne – zarówno pochodzenia antropogenicznego, jak i naturalnego – występują zazwyczaj nieoczekiwanie i ujawniają się z dużą prędkością. Zmiany morfologii powierzchni terenu cechują się w takich przypadkach dużą gwałtownością, a rejony ich występowania nie podlegają najczęściej stałemu monitoringowi naziemnemu. Z tego względu kompleksowe opisanie skutków zaistnienia zjawisk tego typu – zwłaszcza po upływie pewnego czasu od ich wystąpienia – jest trudne, a często niemożliwe. Jednocześnie, dla badań nad charakterystykami jakościowymi i ilościowymi zjawisk dynamicznych, wartości i kierunki przemieszczeń powierzchni terenu będące ich wynikiem mają duże znaczenie. Zastosowanie satelitarnej interferometrii radarowej w badaniach zmian rzeźby powierzchni terenu wywołanych przez zjawiska takie jak trzęsienia ziemi jest już od pewnego czasu rutyną. Niemniej misja Sentinel, która prowadzona jest przez Europejską Agencję Kosmiczną, stwarza nowe możliwości prowadzenia monitoringu na obszarach, na których wystąpiły zjawiska o charakterze dynamicznym. Autorzy postanowili sprawdzić, czy wstrząs pochodzenia górniczego generuje ruchy powierzchni terenu oraz zbadać, w jakiej odległości od epicentrum mają one miejsce oraz określić rząd wielkości ruchów tego typu. Analizy interferometryczne, które oparto na metodzie satelitarnej interferometrii różnicowej DInSAR na podstawie zobrazowań radarowych pochodzących z misji Sentinel pozwoliły na uzyskanie odpowiedzi na te pytania.
Dynamic phenomena, both anthropogenic and natural, usually occur unexpectedly, at high speed. During such an event, changes in ground surface morphology become rapid. What is more, permanent ground monitoring in the areas of that transformations is usually not carried out. Therefore, the comprehensive description of the effects of such phenomena – especially after some time since the event took place – is difficult and often impossible. Nevertheless, the research on qualitative and quantitative characteristics of dynamic phenomena, the values and directions of surface movements induced by their occurrence play an important role. At present, the application of satellite radar interferometry in order to assess displacements caused by earthquakes became a pattern. However, the Sentinel mission, which is being run by the European Space Agency, has opened up a new opportunities of ground deformation monitoring, particularly in the areas affected by dynamic phenomena. The authors decided to investigate whether a mining induced tremor generates surface movements and what the range as well as the dynamism of those movements are. The use of differential radar satellite interferometry DInSAR based on the Sentinel imagery radars allowed us to deepen the investigation on the ground movements caused by mining related earthquakes.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2017, 101; 229-245
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Sentinel-2 and EnMAP new satellite data to the mapping of alpine vegetation of the Karkonosze Mountains
Autorzy:
Jędrych, M.
Zagajewski, B.
Marcinkowska-Ochtyra, A.
Powiązania:
https://bibliotekanauki.pl/articles/92448.pdf
Data publikacji:
2017
Wydawca:
Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Tematy:
Sentinel-2
EnMAP
classification
alpine vegetation
satellite systems
Opis:
Effective assessment of environmental changes requires an update of vegetation maps as it is an indicator of both local and global development. It is therefore important to formulate methods which would ensure constant monitoring. It can be achieved with the use of satellite data which makes the analysis of hard-to-reach areas such as alpine ecosystems easier. Every year, more new satellite data is available. Its spatial, spectral, time, and radiometric resolution is improving as well. Despite significant achievements in terms of the methodology of image classification, there is still the need to improve it. It results from the changing needs of spatial data users, availability of new kinds of satellite sensors, and development of classification algorithms. The article focuses on the application of Sentinel-2 and hyperspectral EnMAP images to the classification of alpine plants of the Karkonosze (Giant) Mountains according to the: Support Vector Machine (SVM), Random Forest (RF), and Maximum Likelihood (ML) algorithms. The effects of their work is a set of maps of alpine and subalpine vegetation as well as classification error matrices. The achieved results are satisfactory as the overall accuracy of classification with the SVM method has reached 82% for Sentinel-2 data and 83% for EnMAP data, which confirms the applicability of image data to the monitoring of alpine plants.
Źródło:
Polish Cartographical Review; 2017, 49, 3; 107-119
2450-6974
Pojawia się w:
Polish Cartographical Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Sentinel-2A to identify the change in dry marginal agricultural land occupation
Autorzy:
Indarto, Indarto
Putra, Bayu T. W.
Mandala, Marga
Powiązania:
https://bibliotekanauki.pl/articles/1844401.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
agricultural
change
land
mapping
marginal
Sentinel-2A
Opis:
Dry marginal agricultural land (DryMAL) potentially use as an alternative resource for crop production. DryMAL defined as land having low natural fertility due to its intrinsic properties and forming environmental factors. This study uses Sentinel-2A imagery to map the spatial extent, compare the result of the classification, and identify the change in DryMAL occupation. The area of study (461.9 km2) is part of Situbondo Regency and is located at the eastern part of East Java, Indonesia. Sentinel-2A image captured in dry-season of 2018 use for this study. Then, supervised image classification using a maximum likelihood algorithm use for image treatment and processing. Furthermore, 450 ground control points for training areas collected during the field surveys. Five bands use in the classification process. The maps produced from the classification process were then compared to the land-use map from the year 2000. The change in DryMAL occupation from 2000 to 2018 was calculated by comparing the classified and land-use map. Supervised classification yielded an overall accuracy of 95.8% and a kappa accuracy of 93.2%. The classification produced six (6) classes of land use: (1) forest, (2) pavement or built-up area, (3) irrigated paddy field, (4) non-irrigated rural area, (5) dry marginal land and (6) water body. Globally, during the last two decades, regional development led by the Regency occupied more DryMAL area for developing plantation. The effort reduces the amount of non-irrigated and converting to the plantation, pavement areas, and irrigated paddy-field.
Źródło:
Journal of Water and Land Development; 2020, 47; 89-95
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping South Baltic near-shore bathymetry using sentinel-2 observations
Autorzy:
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/259485.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
near-shorel satellite
derived
bathymetry
Sentinel
multispectra
observation
Opis:
One of the most promising new applications of remote observation satellite systems (RO) is the near-shore bathymetry estimation based on spaceborn multispectral imageries. In recent years, many experiments aiming to estimate bathymetry in optically shallow water with the use of remote optical observations have been presented. In this paper, optimal models of satellite derived bathymetry (SDB) for relatively turbid waters of the South Baltic Sea were presented. The obtained results were analysed in terms of depth error estimation, spatial distribution, and overall quality. The models were calibrated based on sounding (in-situ) data obtained by a single-beam echo sounder, which was retrieved from the Maritime Office in Gdynia, Poland. The remote observations for this study were delivered by the recently deployed European Space Agency Sentinel-2 satellite observation system. A detailed analysis of the obtained results has shown that the tested methods can be successfully applied for the South Baltic region at depths of 12-18 meters. However, significant limitations were observed. The performed experiments have revealed that the error of model calibration, expressed in meters (RMSE), equals up to 10-20% of the real depth and is, generally, case dependent. To overcome this drawback, a novel indicator of determining the maximal SDB depth was proposed. What is important, the proposed SDB quality indicator is derived only on the basis of remotely registered data and therefore can be applied operationally.
Źródło:
Polish Maritime Research; 2017, 3; 15-25
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of geomatic tools for the diachronic monitoring of landscape metrics in the northeastern algerian highlands, case of the city of Setif
Autorzy:
Kraria, Hocine
Zighmi, Karim
Chibani, Abdelmouhcene
Powiązania:
https://bibliotekanauki.pl/articles/2201671.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
LAUP
GIS
RS
PCA
Sentinel 2A
Landsat
Opis:
Geomatic tools could be used efficiently for urban development planning. The problem of the study lies in the extensive land use of terrains that are now suitable for heavy construction which slows down the development of new facilities. Furthermore, the authorities are forced to plan future settlements around Setif, at a distance of 8 to 12 kilometers from the city limits, threatening the long-term viability of construction and the ring of farmland that connects them to the core city. This must be done during the planning stage based on a diachronic analysis of all the natural and physical factors/parameters. The main objective of this research is to explore the application of landscape metrics to the analysis and monitoring of urban growth in the city of Setif, north-east of Algeria. For this purpose, our research paper uses Geographic Information System (GIS) and Remote Sensing (RS) techniques based on Principal Component Analysis (PCA) and the Angle Mapper Algorithm (SAM) target method for the analysis of urban land planning and sustainable urban planning of Setif. In the result of these analyses we propose suitability/buildability maps with more suitable construction sites. The research method is based on a 17-year time series dataset compiled from the Sentinel 2A and Landsat imagery between 2004 and 2021. Additionally, we used a cadastral Vs geotechnical overlay to estimate soil capacity. This work proves again that the integration of RS and GIS techniques allows for scientific identification of the lands suitable for urban development (LAUP).
Źródło:
Geomatics, Landmanagement and Landscape; 2022, 4; 67--79
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wybranych problemów biopsji węzła wartownika u chorych z rakiem piersi
Analysis of selected problems of sentinel lymph node biopsy in patients with breast cancer
Autorzy:
Nowikiewicz, Tomasz
Biedka, Marta
Krajewski, Edward
Koper, Krzysztof
Windorbska, Wiesława
Powiązania:
https://bibliotekanauki.pl/articles/1031208.pdf
Data publikacji:
2012
Wydawca:
Medical Communications
Tematy:
breast cancer
lymphoscintigraphy
nodal metastases
sentinel lymph node biopsy
sentinel node
biopsja węzła wartownika
limfoscyntygrafia
przerzuty węzłowe
rak piersi
węzeł wartownik
Opis:
Sentinel lymph node biopsy in patients with early-stage breast cancer is an example of a surgical procedure which, despite its long history, has had no uniform standard of performance implemented. This is a problem which concerns both the indications and limitations of this method as well as many of the technical aspects connected with the procedure. This paper is an attempt to resolve some of the controversies mentioned above based on the clinical experience of the authors. Material and method: The group consisted of 974 patients suffering from breast cancer and treated from January 2004 through October 2011 in the Clinical Department of Breast Cancer and Reconstructive Surgery of the Oncology Center in Bydgoszcz who were also scheduled for sentinel lymph node removal. Data regarding the preoperative diagnosis of the primary tumor, such as minimally invasive methods (FNAB, core biopsy, and mammotome biopsy) or open surgical biopsy (tumorectomy, quadrantectomy, or past breast operations with no relation to the current treatment) of the location of the lesion and the sentinel lymph node identification method (combined isotope-dye, isotope, or dye method) was analyzed. Results: Ninety-four point five percent of all sought nodes were detected. The detection rate for the combined SLN marking and isotope methods amounted to 94.4% each, whereas in the case of the dye method, it amounted to 100%. Of all the patients who underwent surgery for the first time, 95.0% had the sentinel lymph node location isolated during the operation, whereas in the case of patients who had previously undergone surgical treatment of the breast or surgical biopsy of a tumor it was 92.1%. Moreover, the location of the tumor within the breast did not have a significant impact on the success of the sentinel lymph node biopsy. Conclusions: The surgical biopsy of the primary lesion preceding the removal of the sentinel lymph node does not have a significant impact on the possibility of the detection of the node sought. The situation is similar with regard to the selected method of sentinel lymph node detection and the location of the primary tumor. As a result, it is possible to extend the usage of the sentinel lymph node biopsy into a wider range of cases.
Biopsja węzła wartownika u chorych z niezaawansowanym rakiem piersi jest przykładem procedury chirurgicznej, dla której mimo upływu długiego czasu od jej wprowadzenia nie przyjęto ujednoliconego standardu wykonania. Problem dotyczy zarówno wskazań i ograniczeń do zastosowania tej metody operacyjnej, jak i wielu aspektów technicznych. W prezentowanej pracy podjęto próbę rozstrzygnięcia niektórych spośród wspomnianych kontrowersji na podstawie zebranych doświadczeń klinicznych autorów. Materiał i metoda: Badaniami objęto grupę 974 chorych z rakiem piersi zakwalifikowanych do wycięcia węzła wartownika, leczonych na Oddziale Klinicznym Nowotworów Piersi i Chirurgii Rekonstrukcyjnej Centrum Onkologii im. prof. Franciszka Łukaszczyka w Bydgoszczy w okresie od 1.01.2004 do 31.10.2011 roku. Przeanalizowano dane dotyczące sposobu diagnostyki przedoperacyjnej guza pierwotnego – obejmującej metody małoinwazyjne (BAC, biopsja gruboigłowa, biopsja mammotomiczna) lub otwartą biopsję chirurgiczną (tumorektomia, kwadrantektomia bądź przebyte w przeszłości operacje gruczołu piersiowego – bez związku z obecnym leczeniem), lokalizacji zmiany oraz rodzaju metody identyfikacji węzła wartownika (skojarzonej izotopowo-barwnikowej, izotopowej lub barwnikowej). Wyniki: Poszukiwany węzeł zidentyfikowano ogółem u 94,5% badanych. Odsetek zidentyfikowanych węzłów za pomocą metody skojarzonej oznaczania węzła wartownika oraz metody izotopowej wyniósł po 94,4%, w przypadku użycia tylko barwnika – 100%. U chorych operowanych pierwszorazowo śródoperacyjnie węzeł wartownika wyizolowano u 95,0% pacjentek, u chorych po wcześniejszym leczeniu operacyjnym piersi bądź biopsji chirurgicznej guza – w 92,1% przypadków. Powodzenie biopsji węzła wartownika również nie zależało istotnie od umiejscowienia guza w obrębie piersi. Wnioski: Poprzedzająca wycięcie węzła wartownika biopsja chirurgiczna zmiany pierwotnej nie wpływa istotnie na możliwość odnalezienia poszukiwanego węzła. Podobna zależność dotyczy także metody identyfikacji węzła wartownika oraz lokalizacji guza pierwotnego. Umożliwia to rozszerzenie niektórych wskazań do zastosowania biopsji węzła wartownika.
Źródło:
Current Gynecologic Oncology; 2012, 10, 4; 296-306
2451-0750
Pojawia się w:
Current Gynecologic Oncology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remote sensing techniques to assess chlorophyll lfuorescence in support of crop monitoring in Poland
Autorzy:
Gurdak, Radosław
Bartold, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/1955011.pdf
Data publikacji:
2021-12-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
spectral vegetation indices
land surface temperature
JECAM
Sentinel satellites
Opis:
The increase in demand for food and the need to predict the impact of a warming climate on vegetation makes it critical that the best tools for assessing crop production are found. Chlorophyll fluorescence (ChlF) has been proposed as a direct indicator of photosynthesis and plant condition. The aim of this paper is to study the feasibility of estimating ChlF from spectral vegetation indices derived from Sentinel-2, in order to monitor crop stress and investigate ChlF changes in response to surface temperatures and meteorological observations. The regressions between thirty three Sentinel-2-derived VIs, and ChlF measured on the ground were evaluated in order to estimate the best predictors of ChlF. The r-Pearson correlation and polynomial linear regression were used. For maize, the highest correlation between ChlF and VIs were found for NDII (r=0.65) and for SIPI (r=-0.68). The weakest relationship between VIs and ChlF were found for sugar beets. Despite this, it should be noted that the highest correlation for sugar beets appeared for EVI (r=0.45) and S2REP (r=0.43). The results of this study indicate the need for a synergy of low and high resolution satellite data that will enable a more detailed analysis for estimating fluorescence and its relation to climatic conditions, environmental aspects, and VIs derived from satellite images.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2021, 25, 4; 226-237
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of Remote Sensing Techniques and Spectral Analyzes to Assess the Content of Heavy Metals in Soil – A Case Study of Barania Góra Reserve, Poland
Autorzy:
Sobura, Szymon
Widłak, Małgorzata
Hejmanowska, Beata
Muszyńska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2174645.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
remote sensing
heavy metals
Sentinel-2
soil
spectral indices
Opis:
The understanding of the spatial and temporal dynamics of farmland processes is essential to ensure the proper crop monitoring and early decision making needed to support efficient resource management in agriculture. By creating appropriate crop management strategies, one can increase harvest efficiency while reducing costs, waste, chemical spraying, and inhibiting the impact of biotic and abiotic factors on crop stress. Only reliable spatial information makes it possible to comprehend the influence of various factors on the environment. The main objective of the research presented in the paper was to assess the possibility of using maps of vegetation and soil indices, such as NDVI, SAVI, IRECI, CIred-edge, PSRI and HMSSI, calculated on the basis of images from the Sentinel-2 satellite, to qualitatively determine the increased amount of heavy metals in the soil in the areas of small agricultural plots around the Barania Góra nature reserve in Poland. The conducted pilot project shows that the spectral indices: NDVI, SAVI, IRECI, CIred-edge, PSRI, and HMSSI, calculated on the basis of images from Sentinel-2, have the potential to assess the content of nickel zinc, chromium and cobalt in the soil on agricultural plots. However, the confirmation of the obtained results requires continuation of the research.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 4; 187--213
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the Distribution of Air Pollutants (Carbon Monoxide) during the Control of the COVID-19 Pandemic in Jakarta, Surabaya, and Yogyakarta, Indonesia
Autorzy:
Suhardono, Sapta
Septiariva, Iva Yenis
Rachmawati, Siti
Matin, Hashfi Hawali Abdul
Qona'ah, Niswatul
Nirwana, Bayu
Suryawan, I. Wayan Koko
Sari, Mega Mutiara
Prayogo, Wisnu
Powiązania:
https://bibliotekanauki.pl/articles/24201721.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
COVID-19 pandemic
carbon monoxide
Sentinel-5P
LSSR
Opis:
The condition of the Coronavirus Disease 2019 (COVID-19) pandemic in 2020 characterizing DKI Jakarta, Surabaya, and Yogyakarta Provinces which have a high population density in 2019, necessitates implementing Large-Scale Social Restrictions (LSSR) to control or break the chain of the spread of COVID-19. The LSSR policy that limits community activities, be it business activities, transportation, and the industrial sector, will impact social activities and the environment due to the reduced intensity of community activities. Therefore, this study aimed to determine changes in the carbon monoxide (CO) levels in Jakarta, Surabaya and Yogyakarta during the pre-pandemic and during the pandemic. The method used is the tropospheric CO concentration extracted from the Sentinel-5P satellite data. The CO data were retrieved and calculated using Google Earth Engine. The COVID-19 pandemic reduced CO level by 19.7%, 14.9%, and 21%, respectively. The paired t-test shows no significant difference from before the COVID-19 pandemic, with a significance of 0.05. The highest pre-pandemic average and total CO concentration levels were 0.042 and 1.0198 mol/m2 in Yogyakarta, respectively, whereas the lowest during the pandemic were 0.02845 and 0.6828 mol/m2 in Surabaya. Overall, the three cities have a weak relationship between CO level and precipitation as well as temperatures and CO level.
Źródło:
Journal of Ecological Engineering; 2023, 24, 4; 151--162
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ruchy powierzchni terenu w rejonie pól geotermalnych obserwowane z zastosowaniem Satelitarnej Interferometrii Radarowej
Autorzy:
Łukosz, Magdalena A.
Witkowski, Wojciech
Lisowska, Anna
Malinowska, Agnieszka A.
Powiązania:
https://bibliotekanauki.pl/articles/2037336.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
DInSAR
geotermia
kompakcja
osiadania
Sentinel-1
geothermal
compaction
subsidence
Opis:
Land surface displacement in the area of geothermal fields observed by Satellite Radar Interferometry
Źródło:
Przegląd Górniczy; 2021, 77, 4-6; 36--45
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free water table area monitoring on wetlands using satellite and UAV orthophotomaps - Kampinos National Park case study
Autorzy:
Góraj, Maciej
Wróblewski, Cezary
Ciężkowski, Wojciech
Jóźwiak, Jacek
Chormański, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1203882.pdf
Data publikacji:
2019
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
UAV
Sentinel-2
machine learning
surface water
inundation
wetlands
Opis:
The surface water table level is a crucial factor for the existence of wetland habitats, and valuable from the point of view of environmental protection. In particular, surface water table in a hydrological year play an important role, affecting the seasonal changes in conditions of the development of species inhabiting a given patch of vegetation. The occurrence of floods often determines the possibility of survival of a given plant community. Information on the seasonal variability of surface waters, and above all the range of seasonal floods, is very important from the point of view of planning protection activities in National Parks in order to preserve wetland habitats. Nowadays, remote sensing data is an important source of spatial information, particularly those characterized by low cost data acquisition and processing. One such source is imagery collected from satellites, along with products freely distributed by the European Space Agency. Satellites of the Sentinel constellation provide multi-spectral optical remote sensing images recorded at visible and infrared wavelengths. Due to the short satellite revisit time of the Sentinel, the images from this satellite constitute a potential source of information for the monitoring of moisture on wetlands with a high temporal resolution. In this study, the authors aim to demonstrate the possibilities associated with the use of satellite images to monitor the range of a free surface water table in the pilot area located within the basin of the Łasica Channel, located in the Kampinos National Park (Poland). The accuracy of the results of the remote sensing transformations will be assessed using high resolution RGB images obtained with the use of unmanned aerial vehicles (UAV) and control points measurements. The maps of free water table has been acquired as an result of ensemble regressors (Random Forest, Extra Trees, Bagging). Regressors has been learned and applied for two sessions. Promising results were obtained indicating the possibility of using the proposed method on a similar scale.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2019, 7, 1; 23-30
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastline change-detection method using remote sensing satellite observation data
Autorzy:
Markiewicz, Ł.
Mazurek, P.
Chybicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/331592.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
coastal monitoring
SAR
Sentinel
Landsat
background subtraction
image processing
Opis:
Coastal zones are not only the fundaments for local economics based on trade, shipping and transport services, but also a source of food, energy, and resources. Apart from offering diverse opportunities for recreation and tourism, coastal zones provide protection against storms and other meteorological disturbances. Environmental information is also essential because of the direct influence on a country’s maritime zones, which are territorial sea and exclusive economic zones. Keeping local communities and ecosystems healthy requires monitoring and assessing of all the vital changes of territorial sea and its baseline. The paper presents a method and a concept of a system that provides an efficient means of automatic analysis of spatial data provided by satellite observation systems (optical Landsat 8 and SAR Sentinel 1) in order to monitor, and detect, changes in the coastline. The proposed methodology is based on a set of algorithms that enable one to trace and detect changes in coastline shape, and eventual damage to marine infrastructure, such as breakwaters and harbours, relying on high resolution satellite observational products.
Źródło:
Hydroacoustics; 2016, 19; 277-284
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Interaction of Chlorophyll-a and Total Suspended Matter along the Western Semarang Bay, Indonesia, Based on Measurement and Retrieval of Sentinel 3
Autorzy:
Maslukah, Lilik
Ismunarti, Dwi Haryo
Widada, Sugeng
Sandi, Nur Fikri
Prayitno, Hanif Budi
Powiązania:
https://bibliotekanauki.pl/articles/2202166.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Sentinel 3
chlorophyll-a
total suspended matter
linear regression
Opis:
The Kendal Regency area is one of the areas on the northern coast of Central Java that has been experiencing rapid industrial development. The high human activity in this area will impact the quality of water in these surrounding areas and affect the fertility of the waters. The concentrations of chlorophyll-a (Chl-a) and total suspended matter (TSM) are major water quality parameters that can be retrieved using remotely sensed data. The retrieval satellite of the 3 OLCI chosen in this study has a 300 m spatial resolution. This study aimed to see the distribution and effect of total suspended matter (TSM) on chlorophyll-a based on measurement and retrieval of Sentinel 3 imagery using the linear regression method. The results show the chlorophyll-a distribution and the value from retrieval satellite are higher and occur over larger surface area compared to chlorophyll-a measurements. The linear regression model of chlorophyll-a by retrieval satellite imagery and measurement is y = 0.65x + 4.65 with R2 = 0.54. The presence of high amounts of suspended solids in the waters causes disturbances in the reflectance values, which are recorded by the retrieval of satellite. The model regression chlorophyll-a with TSM accuracy from retrieval satellite results in the equation y = -0.0416x + 5.14 (R2 = 0.45, p = 0.05, n = 13). The determination (R2) coefficient value is 0.445, which means that suspended solids have a 44.5% effect on chlorophyll-a and 55.5% is influenced by other factors and not examined in this study. The results show that TSM has an influence on the accuracy of chlorophyll-a and retrieval satellite recording can be disrupted if waters have high turbidity.
Źródło:
Journal of Ecological Engineering; 2022, 23, 10; 191--201
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial and Temporal Variability of Moisture Condition in Soil-Plant Environment using Spectral Data and Gis Tools
Autorzy:
Grzywna, H.
Dąbek, P. B.
Olszewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/123280.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
drought
soil moisture
NDVI
Sentinel-2
satellite data
remote sensing
Opis:
The studies on agricultural droughts require long-term atmospheric, hydrological and meteorological data. On the other hand, today, the possibilities of using spectral data in environmental studies are indicated. The development of remote sensing techniques, increasing the spectral and spatial resolution of data allows using remote sensing data in the study of water content in the environment. The paper presents the results of the analysis of moisture content of soil-plant environment in the lowland areas of river valley using the spectral data from Sentinel-2. The analyses were conducted between February and November 2016. The spectral data were used to calculate the Normalize Differential Vegetation Index (NDVI) which provided the information about the moisture content of the soil-plant environment. The analyses were performed only on grasslands, on 22 objects located in the research area in the Oder river valley between Malczyce and Brzeg Dolny, Poland. The NDVI values were correlated with the hydrological and meteorological parameters. The analyses showed spatial and temporal variability of the moisture conditions in the soil-plant environment showed by the NDVI variability and existence some relationships between the climatic and spectral indices characterizing the moisture content in the environment.
Źródło:
Journal of Ecological Engineering; 2018, 19, 6; 56-64
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena obrazowych danych teledetekcyjnych do identyfikacji obiektów w zielonej i błękitnej infrastrukturze
Assessment of remote sensing image data to identify objects in green and blue infrastructure
Autorzy:
Pluto-Kossakowska, Joanna
Władyka, Monika
Tulkowska, Weronika
Powiązania:
https://bibliotekanauki.pl/articles/132389.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
ortofotomapa lotnicza
Sentinel-2
NDVI
BDOT10k
aerial orthophotomap
Opis:
W ostatnich latach koncepcja zielonej i błękitnej infrastruktury zdobywa coraz większe uznanie i coraz częściej jest wdrażana również w polskich miastach i gminach. Pełni wiele ważnych funkcji, począwszy od aspektu rekreacyjnego, ekologicznego i ekonomicznego aż po gospodarczy. Koncepcja ta przywiązuje szczególną wagę do elementów środowiska przyrodniczego przy podejmowaniu decyzji dotyczących głównie zagospodarowania przestrzennego, ale też do aspektów jego monitorowania i zarządzania. Aby sprostać temu zadaniu niezbędne jest odwołanie się do aktualnych danych przestrzennych. Można z powodzeniem wykorzystać istniejące bazy danych przestrzennych, jak np. BDOT10k, Natura 2000 czy inne tematyczne powstające w urzędach miast, np. w biurach ochrony środowiska. Wymagają one jednak ustawicznej aktualizacji i tu w sukurs przychodzą zdjęcia wielospektralne, które mogą znacznie przyspieszyć i zautomatyzować proces aktualizacji bazy danych przestrzennych. W zależności od potrzeb i szczegółowości bazy danych można do tego celu wykorzystać dane optyczne z pułapu lotniczego lub satelitarnego. Celem przeprowadzonych badań jest analiza możliwości wykorzystania ortofotomapy lotniczej oraz zdjęcia satelitarnego Sentinel-2 pozyskanych dla dwóch różnych obszarów badawczych. Do eksperymentów zostały wybrane obszary testowe odmienne pod względem charakterystyki pokrycia terenu, stopnia zainwestowania i krajobrazu. Była to gmina miejsko-wiejska o krajobrazie rolniczym oraz centralna dzielnica miasta wojewódzkiego o wysokim wskaźniku zurbanizowania. Opracowano i przetestowano metodykę przetwarzania ortofotomapy i zdjęcia satelitarnego w celu ekstrakcji informacji o obiektach topograficznych reprezentujących roślinność oraz wody będącymi integralną częścią bazy danych „błękitnej i zielonej infrastruktury”. Przeprowadzone badania i analizy porównawcze wskazały na potencjał i ograniczenia obu źródeł danych teledetekcyjnych.
In recent years, the concept of green and blue infrastructure has been earning recognition and is increasingly being implemented in Polish cities and municipalities. It serves many important functions, ranging from recreational, ecological aspects to economic ones. This concept attaches particular attention to elements of the natural environment when making decisions regarding mainly spatial development, but also to aspects of its monitoring and management. To meet this task, it is necessary to refer to current spatial data. It is possible to successfully use existing spatial databases such as BDOT10k, Natura 2000 or other thematic created in city offices, e.g. in environmental protection offices. However, they require constant updating and here remote sensing data comes in, which speeds up the database update process. Depending on the needs and detail of the database, you can obtain data for this purpose from both the air and satellite altitude. The purpose of the research was to analyze the possibilities of using an aerial orthophotomap and a Sentinel-2 satellite image obtained for two different research areas. Test areas that were different in terms of land cover and local government units were selected for the experiments. It was an urban-rural commune with an agricultural landscape and the central district of a selected provincial city with a high urban index. The methodology of orthophotomap and satellite image processing and extraction of information about topographic objects related to vegetation and waters being an integral part of the „blue and green infrastructure” database was developed and tested. The conducted research and comparative analyzes indicated the potential and limitations of both sources of remote sensing data.
Źródło:
Teledetekcja Środowiska; 2018, 59; 13-27
1644-6380
Pojawia się w:
Teledetekcja Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mapping of slow vertical ground movement caused by salt cavern convergence with Sentinel-1 tops data
Monitoring powolnych ruchów powierzchni terenu wynikających z konwergencji komór solnych przy wykorzystaniu zobrazowań radarowych z misji Sentinel 1
Autorzy:
Malinowska, A.
Hejmanowski, R.
Witkowski, W. T.
Guzy, A.
Powiązania:
https://bibliotekanauki.pl/articles/219680.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
InSAR
DInSAR
Sentinel 1
powolne osiadanie powierzchni terenu
kopalnia soli
Opis:
The geodetic measurements optimization problem has played a crucial role in the mining areas affected by continuous ground movement. Such movements are most frequently measured with the classical geodetic methods such as levelling, tachymetry or GNSS (Global Navigation Satellite System). The measuring techniques are selected with respect to the dynamics of the studied phenomena, surface hazard degree, as well as the financial potential of the mining company. Land surface changes caused by underground exploitation are observed with some delay because of the mining and geological conditions of the deposit surroundings. This delay may be considerable in the case of salt deposits extraction due to slow convergence process, which implies ground subsidence maximum up to a few centimeters per year. Measuring of such displacements requires high precision instruments and methods. In the case of intensely developed urban areas, a high density benchmark network has to be provided. Therefore, the best solution supporting the monitoring of vertical ground displacements in the areas located above the salt deposits seems to be the Sentinel 1-A radar imaging satellite system. The main goal of the investigation was to verify if imaging radar from the Sentinel 1 mission could be applied to monitor of slow ground vertical movement above word heritage Wieliczka salt mine. The outcome of the analysis, which was based on DInSAR (Differential SAR Interferometry). technology, is the surface distribution of annual subsidence in the period of 2015-2016. The comparison of the results with levelling confirmed the high accuracy of satellite observations. What is significant, the studies allowed to identify areas with the greatest dynamics of vertical ground movements, also in the regions where classical surveying was not conducted. The investigation proved that with the use of Sentinel-1 images sub centimeters slow vertical movements could be obtained.
Problem optymalizacji pomiarów geodezyjnych na obszarach poddanych wpływom ciągłych deformacji powierzchni terenu wciąż stanowi wyzwanie. Pomiary ruchów powierzchni na terenach górniczych najczęściej wykonywane są przy wykorzystaniu klasycznych metod geodezyjnych takich jak niwelacja, tachimetria czy pomiary GNSS. Technika pomiarowa jest dobierana w odniesieniu do dynamiki zjawiska, stopnia zagrożenia powierzchni terenu i potencjału finansowego, którym dysponuje zleceniodawca. Przekształcenia powierzchni terenu obserwowane są z pewnym opóźnieniem w stosunku do czasu prowadzenia wydobycia. Opóźnienie to wynika m.in. z warunków górniczo-geologicznych otoczenia złoża i jest zdecydowanie największe w przypadku prowadzenia wydobycia soli. Powolna konwergencja podziemnych wyrobisk powoduje osiadania powierzchni terenu dochodzące maksymalnie do kilku centymetrów rocznie. Pomiar tego typu deformacji wymaga wysokiej precyzji, a w przypadku intensywnego zagospodarowania powierzchni terenu również znacznej gęstości sieci pomiarowej. Dlatego też, optymalnym rozwiązaniem wydaje się być wykorzystanie zobrazowań radarowych satelity Sentinel 1-A jako metody wspierającej monitoring przemieszczeń pionowych powierzchni terenu na terenach znajdujących się nad złożem solnym. Prezentowane badania dotyczyły analizy możliwości wykorzystania zobrazowania satelitarnego pochodzącego z misji Sentinel dla wsparcia monitoringu deformacji powierzchni terenu na obszarze miasta Wieliczka na bazie technologii DInSAR. Wynikiem przeprowadzonych analiz jest powierzchniowy rozkład rocznych przyrostów osiadań w okresie 2015-2016 nad konwergującymi wyrobiskami górniczymi. Otrzymane wyniki, poddane analizie dokładnościowej poprzez ich porównanie z pomiarami geodezyjnymi realizowanymi na liniach obserwacyjnych, potwierdziły bardzo wysoką dokładność pomiarów satelitarnych. Prowadzone badania pozwoliły na wyłonienie rejonów o największej dynamice ruchów pionowych, również w strefach, w których klasyczne pomiary geodezyjne nie są prowadzone.
Źródło:
Archives of Mining Sciences; 2018, 63, 2; 383-396
0860-7001
Pojawia się w:
Archives of Mining Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating the potential of Sentinel-2 satellite images for water quality characterization of artificial reservoirs: The Bin El Ouidane Reservoir case study (Morocco)
Autorzy:
Karaoui, Ismail
Arioua, Abdelkrim
Boudhar, Abdelghani
Hssaisoune, Mohammed
Mouatassime, Sabri El
Ouhamchich, Kamal Ait
Elhamdouni, Driss
Idrissi, Abdelkhalek El Amrani
Nouaim, Wafae
Powiązania:
https://bibliotekanauki.pl/articles/108621.pdf
Data publikacji:
2019
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
Bin El Ouidane
water quality
sentinel
simultaneous
correlation
stepwise regression
Opis:
Monitoring water quality in large dams is becoming a necessity for protecting stored water from various forms of pollution. This process requires analysis of several samples on a weekly or monthly basis. Our study aims to determine the relationship between water quality parameters (WQP) and digital data from the Sentinel-2 satellite to estimate and map the WQP in the Bin El Ouidane Reservoir. The in situ sampling was carried out in the Bin El Ouidane Reservoir (Azilal Province), followed by analysis of physicochemical parameters in the laboratory. These measurement results were compared with the reflectance in each sampling location to investigate the correlations between bands and laboratory chemical analysis results. The correlation results showed that all studied parameters have an R2 greater than 0.52, and they can be transformed to predictive models by stepwise regression. The accuracy of our proposed models was tested using the Oum Er-Rbia Hydraulic Basin Agency data, and the results showed that only three parameters yield admissible verification results (Chlorophyll A, dissolved Oxygen and Nitrate). Those models were then used in geographic information system software to produce a thematic map of each parameter over the entire surface of the reservoir. As a conclusion, the Sentinel-2 images could help indicate the eutrophication stage in the Bin El Ouidane Reservoir, which is a major risk in major Moroccan reservoirs.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2019, 7, 1; 31-39
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forest Community Mapping Using Hyperspectral (CHRIS/PROBA) and Sentinel-2 Multispectral Images
Autorzy:
Głowienka, Ewa
Zembol, Nicole
Powiązania:
https://bibliotekanauki.pl/articles/2174650.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
hyperspectral
pre-processing
multispectral
Sentinel-2
CHRIS/PROBA
machine learning
Opis:
The possibility to use hyperspectral images (CHRIS/PROBA) and multispectral images (Sentinel-2) in the classification of forest communities is assessed in this article. The pre-processing of CHRIS/PROBA image included: noise reduction, radiometric correction, atmospheric correction, geometric correction. Due to MNF transformation the number of the hyperspectral image channels was reduced (to 10 channels) and smiling errors were removed. Sentinel-2 image (level 2A) did not require pre-processing. Three tree genera occurring in the study area were selected for the classification: pine (Pinus), alder (Alnus) and birch (Betula). Image classification was carried out with three methods: SAM (Spectral Angle Mapper ), MTMF (Mixture Tuned Matched Filtering), SVM (Support Vector Machine). For the CHRIS/PROBA image, the algorithm SVM turned out to be the best. Its overall accuracy (OA) was 72%. The poorest result (OA = 52%) was for the MTMF classifier. In the classification of Sentinel-2 multispectral image the best result was for the MTMF method: OA = 82%, kappa coefficient 0.7. For other methods, the overall accuracy exceeded 65%. Among the classified genera, the highest producer’s accuracy was obtained for pine (PA = 96%), and the broad-leaf genera: alder and birch had PA ranging from 42% to 85%.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 4; 103--117
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie interferometrii satelitarnej do monitoringu deformacji powierzchni terenu na przykładzie LGOM
Satellite interferometry for ground deformation monitoring, LGOM example
Autorzy:
Graniczny, M.
Kowalski, Z.
Kowalski, P.
Przyłucka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2061776.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
InSAR
LGOM
zjawiska sejsmiczne
prążki interferometryczne
Sentinel-1
seismic event
fringes
Opis:
W artykule przedstawiono zmiany powierzchni terenu zaistniałe w obszarze górniczym Rudna między 28 listopada a 10 grudnia 2016 r. Zmiany zarejestrowano na interferogramie różnicowym pozyskanym ze scen najnowszego satelity radarowego Sentinel-1. Interferogram jest obrazem rastrowym, będącym złożeniem dwóch scen radarowych, na którym jest przedstawiona różnica faz odbitego sygnału. Różnica ta odzwierciedla zmiany zaistniałe na powierzchni terenu w postaci prążków interferometrycznych, które można interpretować jako kolejne warstwice zmian morfologii terenu. W badanym okresie zidentyfikowano zmiany rzędu 3 cm. Wszystko wskazuje na to, że były one związane ze wstrząsem sejsmicznym z dnia 29 listopada, co zostało potwierdzone przez porównanie lokalizacji epicentrum zjawiska i wystąpienia deformacji terenu.
The article presents surface deformations and changes in the Rudna mining areas, which occured between 28 November and 10 December 2016. These changes were recorded on the radar differential interferogram derived from the scenes of the ESA radar satellite Sentinel-1. The interferogram is a raster image that is a combination of two radar scenes, showing the phase difference of the reflected microwave signal. This difference reflects changes occurring on the earth surface in the form of interferometric stripes called “fringes”. They are interpreted as contours of changes in earth morphology. During the analyzed period, 3-cm variations were identified. All indications show that they were related to the November 29 seismic shock, which was confirmed by comparing the location of the earthquake epicentre with the recorded fringes.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2017, 469; 59--66
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring of Water Bodies and Non-vegetated Areas in Selenica ‑ Albania with Sar and Optical Images
Autorzy:
Belba, Pietro
Kucaj, Spartak
Thanas, Jorgaq
Powiązania:
https://bibliotekanauki.pl/articles/2105519.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
SAR image
optical image
collocated image
water bodies
NDVI
Sentinel images
Opis:
The availability of Sentinel satellites for providing open data with optical and SAR imagery leads to better opportunities related to Earth surface mapping and monitoring. Recently, optical fusion with radar data has shown improvement in classification quality and the accuracy of information acquired. In this setting, the main objective of this research is to monitor the environmental impact of an open-pit mine on water, vegetation, and non-vegetation areas by exploring the single and combined use of Sentinel-1 and Sentinel-2 data. The data utilized in this paper were collected from the European Space Agency Copernicus program. After selecting the Selenica region, we explored the products in the Sentinel Application Platform. According to our data, Sentinel-2 misses the small water ponds but successfully identifies the river and open-pit areas. It mistakenly identifies urban structures and cloud areas as non-vegetated and does not identify non-vegetated areas which correspond to mining operation areas. Sentinel-1 identifies very small water ponds and delivers additional information in the cloudy areas, but misses a part of the river. Alongside the strong contribution in identifying the vegetation, it also roughly identifies the non-vegetation areas of mining operations.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 3; 5--25
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 75

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