Temat: geostatistical interpolation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Characterization of monochlorobenzene contamination in soils using geostatistical interpolation and 3D visualization for agrochemical industrial sites in southeast China
Autorzy:: Ren, L.
Lu, H.
He, L.
Zhang, Y.
Powiązania:: https://bibliotekanauki.pl/articles/204614.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: soil pollution
monochlorobenzene
POPs
persistent organic pollutants
geostatistical interpolation
3D visualization
Opis:: Persistent organic pollutants (POPs) originating from agrochemical industries have become an urgent environmental problem worldwide. Ordinary kriging, as an optimal geostatistical interpolation technique, has been proved to be sufficiently robust for estimating values with finite sampled data in most of the cases. In this study, ordinary kriging interpolation integrate with 3D visualization methods is applied to characterize the monochlorobenzene contaminated soil for an agrochemical industrial site located in Jiangsu province. Based on 944 soil samples collected by Geoprobe 540MT and monitored by SGS environmental monitoring services, 3D visualization in terms of the spatial distribution of pollutants in potentially contaminated soil, the extent and severity of the pollution levels in different layers, high concentration levels and isolines of monochlorobenzene concentrations in this area are provided. From the obtained results, more information taking into account the spatial heterogeneity of soil area will be helpful for decision makers to develop and implement the soil remediation strategy in the future.
Źródło:: Archives of Environmental Protection; 2016, 42, 3; 17-24
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The detection of thermophilous forest hotspots in Poland using geostatistical interpolation of plant richness
Autorzy:: Kiedrzynski, M.
Jakubowska-Gabara, J.
Powiązania:: https://bibliotekanauki.pl/articles/58331.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: biodiversity
detection
thermophilous forest
forest
Polska
geostatistical interpolation
plant species
species richness
focal habitat
Opis:: Attempts to study biodiversity hotspots on a regional scale should combine compositional and functionalist criteria. The detection of hotspots in this study uses one ecologically similar group of high conservation value species as hotspot indicators, as well as focal habitat indicators, to detect the distribution of suitable environmental conditions. The method is assessed with reference to thermophilous forests in Poland – key habitats for many rare and relict species. Twenty-six high conservation priority species were used as hotspot indicators, and ten plant taxa characteristic of the Quercetalia pubescenti-petraeae phytosociological order were used as focal habitat indicators. Species distribution data was based on a 10 × 10 km grid. The number of species per grid square was interpolated by the ordinary kriging geostatistical method. Our analysis largely determined the distribution of areas with concentration of thermophilous forest flora, but also regional disjunctions and geographical barriers. Indicator species richness can be interpreted as a reflection of the actual state of habitat conditions. It can also be used to determine the location of potential species refugia and possible past and future migration routes.
Źródło:: Acta Societatis Botanicorum Poloniae; 2014, 83, 3
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Application of geostatistical analyst methods in discovering concealed gold and pathfinder elements as geochemical anomalies related to ore mineralisation
Autorzy:: Lindagato, P.
Li, Y.
Yang, G.
Duan, F.
Wang, Z.
Powiązania:: https://bibliotekanauki.pl/articles/94233.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: geochemical anomalies
geostatistical analyst
kriging interpolation
quantile-quantile plot
anomalie geochemiczne
analityk geostatystyczny
interpolacja krigingowa
wykres kwantyl-kwantyl
Opis:: The study area in the West Junggar Basin is known to be rich in hydrothermal gold deposits and occurrences, even though there has been minimum exploration in the area. It is here hypothesised that this area could host more gold deposits if mineral exploration methods were to be reinforced. This research is aimed at identifying geochemical anomalies of Au, and determining possible factors and conditions which facilitate the formation of anomalies by referring to As and Hg as gold pathfinders. Geostatistical analyst techniques have been applied to 9,852 stream sediments and bedrock data collected on a total surface of 1,280 km2 of West Junggar, Xinjiang (northwest China). The kriging interpolation and quantile-quantile plot methods, combined with statistical methods, successfully identified both Au and its pathfinders’ anomalies. In the present study, median was considered as background values (10.2 ppm for As, 9.13 ppb for Hg and 2.5 ppb for Au), whereas the 95th percentile were threshold values (28.03 ppm for As, 16.71 ppb for Hg and 8.2 ppb for Au) and values greater than thresholds are geochemical anomalies. Moreover, the high concentrations of these three discovered elements are caused primarily by hydrothermal ore mineralisation and are found to be controlled mainly by the Hatu and Sartohay faults of a northeast-southwesterly direction as well as their related secondary faults of variable orientation, which facilitate the easy flow of hydrothermal fluids towards the surface resulting in the formation of geochemical anomalies. Most of anomalies concentration of Au are found near the mining sites, which indicates that the formation of new Au anomalies is influenced by current or previous mining sites through geological or weathering processes. In addition, the low concentration of gold and its pathfinders found far from active gold mine or faults indicates that those anomalies are formed due to primary dispersion of hosting rock.
Źródło:: Geologos; 2018, 24, 2; 95-109
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wiarygodność modelowania 3D zawartości Pb oraz głównych metali w złożu rud Cu-Ag Sieroszowice (LGOM)
Reliability of 3D modelling of the Pb and main metals content in the Sieroszowice Cu-Ag ore deposit (Lubin-Głogów Copper District)
Autorzy:: Wasilewska-Błaszczyk, M.
Kruk, M.
Mucha, J.
Powiązania:: https://bibliotekanauki.pl/articles/2061770.pdf
Data publikacji:: 2017
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: ołów
model 3D
interpolacja
kriging zwyczajny
symulacja geostatystyczna
złoże Cu-Ag
lead
3D model
interpolation
ordinary kriging
geostatistical simulation
Cu-Ag deposit
Opis:: W artykule podjęto próbę oceny możliwości wiarygodnego modelowania 3D zawartości ołowiu w porównaniu do wiarygodności modelowania 3D zawartości głównych metali złoża Cu i Ag. Modele 3D zawartości pierwiastków wykonano metodami interpolacyjnymi (kriging zwyczajny w dwóch wariantach i metoda odwrotnej odległości do kwadratu) oraz symulacyjnymi (symulacja Turning Bands). Weryfikacja dokładności oszacowań zawartości metali w modelu 3D, wykonana punktowo na podstawie zbioru testowego, wykazała że możliwe do zaakceptowania w praktyce geologiczno-górniczej są oszacowania zawartości Cu i Ag (mediany błędów oszacowań w rzędu 40%), natomiast wiarygodność modelu Pb jest mała (mediany błędów rzędu 70%). Wynika to z niekorzystnych cech statystycznych zawartości większości pierwiastków towarzyszących (silnie asymetrycznych rozkładów prawdopodobieństwa, bardzo dużej zmienności i występowania licznych wartości anomalnych) oraz ze znacznie rzadszej sieci opróbowań złoża dla oznaczeń pierwiastków towarzyszących niż dla Cu. Generalnie, obliczone mediany błędów interpolacji dla 4 metod nie dają podstaw do wyróżnienia jakiejkolwiek z nich jako zapewniającej w każdym przypadku wyższą dokładność oszacowań zawartości pierwiastków.
The paper attempts to evaluate the possibility of reliable 3D modelling of lead content against the reliability of 3D modelling of Cu and Ag (main metals in the Sieroszowice Cu-Ag deposit) contents. The 3D modelling of the content of these elements was performed using interpolation (ordinary kriging in two variants, and squared inverse distance weighting) and simulation methods (Turning Bands Simulation). The assessment of the accuracy of estimates of metal contents determined from the 3D model, based on both spot samples and a training set, has shown that the estimated contents of Cu and Ag are acceptable for geological and mining applications (medians of estimation errors in the order of 40%), while the reliability of the Pb model is low (medians of estimation errors in the order of 70%). This is due to the unfavourable statistical features of the majority of the accompanying elements and, in particular, the highly asymmetric probability distributions, their high variability, the presence of numerous anomalous values, and the much lower density of the sampling network in the mining excavations when determining accompanying elements other than Cu. In general, the calculated medians of interpolation errors for the four methods do not allow determining the one providing (in each case) higher accuracy when assessing the content of the elements.
Źródło:: Biuletyn Państwowego Instytutu Geologicznego; 2017, 468; 247--259
0867-6143
Pojawia się w:: Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:: Biblioteka Nauki

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