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A soil texture categorization mapping from empirical and semi-empirical modelling of target parameters of synthetic aperture radar / Shoba Periasamy in Geocarto international, vol 36 n° 5 ([15/03/2021])  

Public [article]  inGeocarto international > vol 36 n° 5 [15/03/2021] . - pp 581 - 598 Titre : A soil texture categorization mapping from empirical and semi-empirical modelling of target parameters of synthetic aperture radar Type de document : Article/Communication Auteurs : Shoba Periasamy, Auteur ; Divya Senthil, Auteur ; Ramakrishnan S Shanmugam, Auteur Année de publication : 2021 Article en page(s) : pp 581 - 598 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Argile [Termes IGN] bande C [Termes IGN] coefficient de rétrodiffusion [Termes IGN] constante diélectrique [Termes IGN] image radar moirée [Termes IGN] image Sentinel-SAR [Termes IGN] indice de végétation [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] limon [Termes IGN] polarisation croisée [Termes IGN] rugosité du sol [Termes IGN] sable [Termes IGN] texture du sol Résumé : (auteur) The present study investigates the potential of synthetic aperture radar in demonstrating the relative percentage of sand, silt and clay content in the soil. The contribution of vegetation and topography in the backscattering coefficient has been significantly reduced by employing the terrain correction model, dual polarized SAR vegetation index and water cloud model. The target parameters namely ‘Soil Roughness (hrms-soil)’ and ‘Dielectric Constant’ (ε′vv−soil ) has arrived from cross-polarization ratio and modified Dubois model. The extracted target parameters are sufficiently correlated with in situ sand (R2 = 0.81) and clay measurements (R2 = 0.78). The relative percentage of silt was mapped by the novel idea of performing the correlation analysis between hrms-soil and ε′vv−soil and thus represented the percentage of silt with reasonable accuracy (R2 = 0.77). From the soil triangle formed with three estimated target parameters, we found that the clay category has shared around 35% of the total area followed by sandy loam (23%). Numéro de notice : A2021-253 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2019.1618924 Date de publication en ligne : 10/06/2019 En ligne : https://doi.org/10.1080/10106049.2019.1618924 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=97276 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2021051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands / P.F.M. Van Gaans in International journal of geographical information science IJGIS, vol 21 n° 5 (may 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 5 (may 2007) . - pp 569 - 587 Titre : Patterns in soil quality: Natural geochemical variability versus anthropogenic impact in soils of Zeeland, The Netherlands Type de document : Article/Communication Auteurs : P.F.M. Van Gaans, Auteur ; J. Spijker, Auteur ; S.P. Vriend, Auteur ; J.N. de Jong, Auteur Année de publication : 2007 Article en page(s) : pp 569 - 587 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] anthropisation [Termes IGN] Argile [Termes IGN] carte géologique [Termes IGN] contamination [Termes IGN] état du sol [Termes IGN] géochimie [Termes IGN] géostatistique [Termes IGN] impact sur l'environnement [Termes IGN] Pays-Bas [Termes IGN] roche sédimentaire [Termes IGN] sous-sol Résumé : (Auteur) We demonstrate a structured approach to identify natural as well as anthropogenic geochemical patterns in sedimentary soils, using statistical techniques that increase in complexity and the requirements for auxiliary data. Comparison with the average upper continental crust identified natural regional features, such as a relative enrichment of As, due to a low-lying deltaic environment, and of Cr and Zr, related to a specific heavy mineral association. Identification of diffuse contamination is best achieved by comparison with a local reference. The Zeeland subsoil is shown to have undergone only minor anthropogenic influence and to serve this purpose very well. A topsoil-subsoil comparison revealed anthropogenic enrichments for Cd, Cu, P, Pb, S, Sb, Sn, Zn, and partly for As, while typically 'non-anthropogenic' trace elements like Cs, Ga, La, and Rb were found not to be enriched. Except for P and S, the enriched components show a good correlation with Al2Oi, a proxy for clay mineralogy, and a bivariate topsoil-subsoil comparison is made using a trimmed Reduced Major Axis regression. Two subregions are identified with different associations (Zn, Pb, and Cd, versus As, Cd, Cu, and Sn) of higher-than-average enrichments. Copyright Taylor & Francis Numéro de notice : A2007-137 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810601064900 En ligne : https://doi.org/10.1080/13658810601064900 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28500 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-07031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-07032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Uncertainty analysis for soil-terrain models / T.F.A. Bishop in International journal of geographical information science IJGIS, vol 20 n° 2 (february 2006)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 20 n° 2 (february 2006) . - pp 117 - 134 Titre : Uncertainty analysis for soil-terrain models Type de document : Article/Communication Auteurs : T.F.A. Bishop, Auteur ; B. Minasny, Auteur ; A.B. Mcbratney, Auteur Année de publication : 2006 Article en page(s) : pp 117 - 134 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] Argile [Termes IGN] écart moyen [Termes IGN] écart type [Termes IGN] incertitude de position [Termes IGN] lissage de données [Termes IGN] méthode de Monte-Carlo [Termes IGN] modèle numérique de terrain [Termes IGN] pédologie locale [Termes IGN] positionnement par GPS [Termes IGN] qualité des données Résumé : (Auteur) The aim of the study was to examine how robust soil-terrain models are to uncertainty in the source elevation data. The study site was a 74ha agricultural field in Australia. A global positioning system was used to measure elevation and the uncertainty of the measurement, therefore allowing maps of elevation and its uncertainty to be created. Monte-Carlo simulation with a modified version of Latin Hypercube Sampling was used to create 100 realizations of a slope map. Clay content was measured at 111 sites, and kriging with external drift was used to map clay content where each slope realization was used as a secondary information source. Maps of the mean and standard deviation of clay content across all realizations were created. The standard deviations of clay content were generally small «4dagkg-1) and in most parts of the field less than the analytical accuracy of the hydrometer method which was used to measure soil clay content in the laboratory. The values in the map of elevation uncertainty were multiplied by 5 and the entire error propagation process was repeated to create a second set of 100 realizations of the clay content. The ratio of the uncertainty in the original DEM was 5:1 when compared with that in the perturbed DEM, i.e. it was multiplied by 5. The ratio between the standard deviation in the two clay-content maps was 3.79: 1, which indicates a reduction in uncertainty through the modelling process. The results showed that the soil-terrain model performs well for the study area, and it is not very sensitive to DEM errors. We conclude that input uncertainty tests as shown in this study should accompany soil mapping studies where secondary information is used in the prediction model. Numéro de notice : A2006-063 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500287073 En ligne : https://doi.org/10.1080/13658810500287073 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27790 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-06021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-06022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Evaluation of hyperspectral remote sensing as a means of environmental monitoring in the St Austell China clay (kaolin) region, Cornwall, UK / R.J. Ellis in Remote sensing of environment, vol 93 n° 1 (30/10/2004)  

Public [article]  inRemote sensing of environment > vol 93 n° 1 (30/10/2004) . - pp 118 - 130 Titre : Evaluation of hyperspectral remote sensing as a means of environmental monitoring in the St Austell China clay (kaolin) region, Cornwall, UK Type de document : Article/Communication Auteurs : R.J. Ellis, Auteur ; P.W. Scott, Auteur Année de publication : 2004 Article en page(s) : pp 118 - 130 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] Argile [Termes IGN] carte géologique [Termes IGN] Cornouailles [Termes IGN] éclairement lumineux [Termes IGN] étalonnage radiométrique [Termes IGN] image HYMAP [Termes IGN] image hyperspectrale [Termes IGN] minerai [Termes IGN] surveillance géologique Résumé : (Auteur) The St. Austell granite of Cornwall, UK contains internationally important deposits of kaolin (china clay), the formation of which result from the alteration of a composite pluton of mineralogically and texturally different primary granite units. To assess the applicability of hyperspectral remote sensing in the St. Austell china clay region, one line of airborne HyMap® hyperspectral data was acquired. These data were processed to correct for atmospheric and illumination effects by calibration from radiance to reflectance data, so that mineral abundance maps could be produced. Minerals associated with the primary granite and its subsequent kaolinisation were identified by image processing and used as mapping endmembers. These minerals include kaolinite, kaolinite with smectite, montmorillonite, muscovite, lepidolite (a lithium mica) and topaz. Hyperspectral data analysis allowed for the identification of the different primary granite units. The spectrally observed compositional differences of the biotite and topaz granite units of the region allowed for fingerprinting of the source of mined waste material as originating from specific pits. The majority of waste tips in the region originate from the nearest china clay workings. However, waste material used in the construction of a mica dam and also as backfill in a disused pit is successfully identified to have been transported across a mapped granite boundary for storage. The effect of mining and mineral processing on the abundance and spatial distribution of minerals in the region is also evident. Wastetips are classified as containing the greatest abundance of mica. This distribution results from the separation of kaolinite during the mineral processing stages. Kaolinite in lower abundance, however, is also identified within these waste areas and is the result of a less than 100% recovery by mining and processing. Numéro de notice : A2004-425 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.07.004 En ligne : https://doi.org/10.1016/j.rse.2004.07.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26952 [article]

SMEX02: field scale variability, time stability and similarity of soil moisture / J.M. Jacobs in Remote sensing of environment, vol 92 n° 4 (30 September 2004)  

Public [article]  inRemote sensing of environment > vol 92 n° 4 (30 September 2004) . - pp 436 - 446 Titre : SMEX02: field scale variability, time stability and similarity of soil moisture Type de document : Article/Communication Auteurs : J.M. Jacobs, Auteur ; B.P. Mohanty, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 436 - 446 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse diachronique [Termes IGN] Argile [Termes IGN] bassin hydrographique [Termes IGN] flore locale [Termes IGN] humidité du sol [Termes IGN] Iowa (Etats-Unis) [Termes IGN] pente [Termes IGN] point de vérification [Termes IGN] précision [Termes IGN] Soil Moisture Experiment [Termes IGN] stabilité dans le temps Résumé : (Auteur) Evaluation of air- or space-bome remote sensors measuring soil moisture requires strategic ground-based sampling. As part of the Soil Moisture Experiment 2002 (SMEX02), daily surface soil moisture sampling at 90-140 locations were conducted in four fields in Walnut Creek watershed, Iowa. Various combinations of soils, vegetation, and topography characterize the fields. Depending on the field's characteristics and soil moisture content, 3 - 32 independent measurements were necessary to capture the field mean volumetric soil moisture with a + 2% bias and 95% confidence interval. Validation of the retrieved soil moisture products from the aircraft microwave instruments using the average of 14 samples per field is more appropriate for dry (25% volumetric soil moisture) range than for intermediate soil moisture range. Time stability analysis showed that an appropriately selected single sampling point could provide similar accuracy across a range of soil moisture conditions. Analyses based on landscape position (depression, hilltop, steep slope, and mild slope) showed that locations with mild slopes consistently exhibit time stable features. Hilltop and steep slope locations consistently underestimated mean field soil moisture. Soils parameters could not be used to identify time stable features as sampling locations with relatively high sand content consistently underestimated the field mean while those locations with relatively high clay content consistently overestimated the field mean. However, the slope position characterization of time stable features was enhanced using soils properties. The mild slope locations having the best time-stable features are those with moderate to moderately high clay content as compare to the field average (28-30% clay). Numéro de notice : A2004-413 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2004.02.017 En ligne : https://doi.org/10.1016/j.rse.2004.02.017 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26940 [article]

Cartographie de la fraction argileuse du sol dans le rif marocain à l'aide du capteur ASTER et de l'analyse géostatique / M. Chikhaoui in Revue internationale de géomatique, vol 14 n° 3 - 4 (septembre 2004 – février 2005)  

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Effectiveness of spectroscopy in identification of swelling indicator clay minerals / P.C. Kariuki in International Journal of Remote Sensing IJRS, vol 25 n° 2 (January 2004)  

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L'aménagement des zones marneuses dans les bassins versants des montagnes de l'atlas tellien semi-aride / H. Vogt (1996)

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Spectral reflectance relationships to turbidity generated by different clay materials / D.S. Bhargava in Photogrammetric Engineering & Remote Sensing, PERS, vol 56 n° 2 (february 1990)  

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Utilization of Landsat multispectral data in geobotanical investigations : the location of ironstone gravel in the Sam Houston national forest, Texas / W.G. Cibula in International Journal of Remote Sensing IJRS, vol 11 n° 2 (February 1990)  

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Alteration detection using TM imagery : the effects of supergene weathering in an arid climate / B.J. Amos in International Journal of Remote Sensing IJRS, vol 10 n° 3 (March 1989)  

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Dynamique sédimentaire et colonisation végétale dans l'anse du Kernic (Finistère-Nord) / C. Bonnot-Courtois (1989)

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Comparison of techniques for discriminating hydrothermal alteration minerals with airborne imaging spectrometer data / S.C. Feldman in Remote sensing of environment, vol 24 n° 1 (February 1988)  

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Discrimination of hydrothermal alteration mineral assemblages at Virginia city, Nevada, using the airborne imaging spectrometer / A. Hutsinpiller in Remote sensing of environment, vol 24 n° 1 (February 1988)  

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Use of airborne imaging spectrometer data to map minerals associated with hydrothermally altered rocks in the northern grapevine mountains, Nevada, and California / F.A. Kruse in Remote sensing of environment, vol 24 n° 1 (February 1988)  

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