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Etudes complémentaires pour le modèle hydro sédimentaire des abords du Mont Saint-Michel / C. Bonnot-Courtois (1997)
Titre : Etudes complémentaires pour le modèle hydro sédimentaire des abords du Mont Saint-Michel : évolution géomorphologique des herbus entre la chapelle Sainte-Anne et la pointe de Roche Torin Type de document : Monographie Auteurs : C. Bonnot-Courtois, Auteur ; J.E. Levasseur, Auteur ; J. Le Rhun, Auteur Editeur : Dinard : Laboratoire de géomorphologie de l'EPHE Année de publication : 1997 Importance : 58 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géographie régionale France
[Termes IGN] baie
[Termes IGN] bassin hydrographique
[Termes IGN] géomorphologie locale
[Termes IGN] herbu
[Termes IGN] modèle hydrographique
[Termes IGN] Mont-Saint-Michel
[Termes IGN] sédimentNuméro de notice : 55754 Affiliation des auteurs : non IGN Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59909 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 55754-01 63.25 Livre Centre de documentation En réserve M-103 Disponible
Titre : GIS-basierte Quantifizierung der Denudation im Zentralen Kenia Rift Titre original : [Quantification basée sur le SIG de la dénudation du rift central au Kenya] Type de document : Thèse/HDR Auteurs : S. Rössner, Auteur Editeur : Munich : Bayerische Akademie der Wissenschaften Année de publication : 1997 Collection : DGK - C Sous-collection : Dissertationen num. 475 Importance : 111 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-7696-9515-1 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] données géologiques
[Termes IGN] érosion
[Termes IGN] géologie locale
[Termes IGN] Kenya
[Termes IGN] modèle numérique de terrain
[Termes IGN] point de vérification
[Termes IGN] positionnement par GPS
[Termes IGN] rift
[Termes IGN] système d'information géographique
[Termes IGN] variabilitéRésumé : (Auteur) In this work a GIS-based approach for quantification of average surface lowering (denudation) was developed. The goal in using a GIS (Geographic Information System) was to explore the methodological opportunities of a GIS in order to obtain spatially high-resolution denudation rates which form the basis for investigations of the regional variability of denudation and its relationship to other landscape-forming factors.
Such a spatially differentiated view of denudation requires a landscape frame of reference which allows direct quantification of the amount of eroded material in the source area of denudation. Within the Bahati-Kinangop Plateau (Central Kenya Rift) this condition is fulfilled for a 700 sq. km. area, where the highest topography is formed by relict elements of a dated erosional surface. These relict parts of the present relief are used to reconstruct the pre-erosional surface at the time when the plateau came into existence (about 3 Ma ago). The elevation difference between the pre-erosional and the present relief represents the amount of denudation since plateau formation. Thus, present topography is a direct measure of the long-term avarage intensity of denudation during the last 3 Ma in this area.
Calculation of denudation rates using the elevation difference method consisted of several steps. It included the derivation of modelling assumptions which were needed for reconstruction of the initial plateau surface based on the geological-tectonic evolution of the area. Additionally, the analogous geo-scientific and topographic data had to be integrated into a digital database in order to perform a quantification of denudation rates within a GIS.
Due to the close morphological relationship between inital and present surfaces, the generation of a Digital Elevation Model (DEM) of the present surface formed the starting point of the GIS-based data analysis. This DEM was obtained from contours of the 1:50.000 topographic maps by creating a triangulated irregular network (TIN) forming the basis for a regular raster interpolation. In order to achieve an average height accuracy in the range of half of an equidistance, a control point based approach was developed. It assess the height accuracy of the DEM in relation to map control points as well as to the real surface as determined by relative GPS measurements in the field.
The reconstruction of the initial plateau surface is based on a combined analysis of topographic and geological information within the GIS which resulted in 96 relict surface elements representing the input information for digital modelling of the pre-erosional relief. Plausibility checks showed that the generated initial surface is in overall accordance to the modelling assumptions. The denudation rates which were derived from the elevation differences between the two DEMs vary between 1 and 20 m/Ma in about 75 % of the study area. The most deeply eroded areas are characterized by rates between 45 and 100 m/Ma and are limited to 5 % of the area. The relict parts of the relief with denudation rates between 0 and 1 m/Ma occupy about 5 % of the area. These results compare well with rates typical for tectonically stable highland areas of Africa.
This GIS-based approach allows assessment of denuation rates in a well understood and reliable way. The results are characterized by a high spatial resolution which has not been obtained so far by other methods used for quantification of denudation. These high resolution rates offer the opportunity of a differentiated regional analysis. As long-term avarage rates they reflect the natural intensity of denudation. Such information are of special value in this area of present intense farming, because they can be used for estimating the influence of human landuse on the intensity of denudation.
(Auteur)In this work a GIS-based approach for quantification of average surface lowering (denudation) was developed. The goal in using a GIS (Geographic Information System) was to explore the methodological opportunities of a GIS in order to obtain spatially high-resolution denudation rates which form the basis for investigations of the regional variability of denudation and its relationship to other landscape-forming factors.
Such a spatially differentiated view of denudation requires a landscape frame of reference which allows direct quantification of the amount of eroded material in the source area of denudation. Within the Bahati-Kinangop Plateau (Central Kenya Rift) this condition is fulfilled for a 700 sq. km. area, where the highest topography is formed by relict elements of a dated erosional surface. These relict parts of the present relief are used to reconstruct the pre-erosional surface at the time when the plateau came into existence (about 3 Ma ago). The elevation difference between the pre-erosional and the present relief represents the amount of denudation since plateau formation. Thus, present topography is a direct measure of the long-term avarage intensity of denudation during the last 3 Ma in this area.
Calculation of denudation rates using the elevation difference method consisted of several steps. It included the derivation of modelling assumptions which were needed for reconstruction of the initial plateau surface based on the geological-tectonic evolution of the area. Additionally, the analogous geo-scientific and topographic data had to be integrated into a digital database in order to perform a quantification of denudation rates within a GIS.
Due to the close morphological relationship between inital and present surfaces, the generation of a Digital Elevation Model (DEM) of the present surface formed the starting point of the GIS-based data analysis. This DEM was obtained from contours of the 1:50.000 topographic maps by creating a triangulated irregular network (TIN) forming the basis for a regular raster interpolation. In order to achieve an average height accuracy in the range of half of an equidistance, a control point based approach was developed. It assess the height accuracy of the DEM in relation to map control points as well as to the real surface as determined by relative GPS measurements in the field.
The reconstruction of the initial plateau surface is based on a combined analysis of topographic and geological information within the GIS which resulted in 96 relict surface elements representing the input information for digital modelling of the pre-erosional relief. Plausibility checks showed that the generated initial surface is in overall accordance to the modelling assumptions. The denudation rates which were derived from the elevation differences between the two DEMs vary between 1 and 20 m/Ma in about 75 % of the study area. The most deeply eroded areas are characterized by rates between 45 and 100 m/Ma and are limited to 5 % of the area. The relict parts of the relief with denudation rates between 0 and 1 m/Ma occupy about 5 % of the area. These results compare well with rates typical for tectonically stable highland areas of Africa.
This GIS-based approach allows assessment of denuation rates in a well understood and reliable way. The results are characterized by a high spatial resolution which has not been obtained so far by other methods used for quantification of denudation. These high resolution rates offer the opportunity of a differentiated regional analysis. As long-term avarage rates they reflect the natural intensity of denudation. Such information are of special value in this area of present intense farming, because they can be used for estimating the influence of human landuse on the intensity of denudation.Numéro de notice : 28015 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=63362 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 28015-01 37.40 Livre Centre de documentation Géomatique Disponible 28015-02 37.40 Livre Centre de documentation Géomatique Disponible Remote sensing'96, integrated applications for risk assessment and disaster prevention for the Mediterranean / Anna Spiteri (1997)
Titre : Remote sensing'96, integrated applications for risk assessment and disaster prevention for the Mediterranean : Proceedings of the 16th EARSel Symposium, Malte, 20 - 23 May 1996 Type de document : Actes de congrès Auteurs : Anna Spiteri, Éditeur scientifique Editeur : Lisse et Amsterdam : Balkema (August Aimé) Année de publication : 1997 Conférence : EARSeL 1996, 16th symposium 20/05/1996 23/05/1996 Malte Importance : 368 p. Format : 18 x 25 cm ISBN/ISSN/EAN : 978-90-5410-855-9 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] bassin méditerranéen
[Termes IGN] déboisement
[Termes IGN] dégradation de l'environnement
[Termes IGN] érosion
[Termes IGN] image Landsat-TM
[Termes IGN] image radar moirée
[Termes IGN] incendie de forêt
[Termes IGN] inondation
[Termes IGN] pollution des mers
[Termes IGN] récif corallien
[Termes IGN] sécheresse
[Termes IGN] système d'information géographique
[Termes IGN] télédétection aérienne
[Termes IGN] télédétection spatiale
[Termes IGN] Vésuve (volcan)Index. décimale : CG1996 Actes de congrès en 1996 Note de contenu : - Opening session
- Environmental change and practical remote sensing applications
- Desertification programmes and projects
- Practical applications of remote sensing for environment mapping
- Integrated regional approaches
- Rainfall, droughts and floods
- Poster session
- Erosion and geomorphological hazards
- Marine pollution
- New remote sensing acquisition and processing data
- Remote sensing techniques for monitoring land degradation (desertification)
- Remote sensing and GIS for risk assessmentNuméro de notice : 24926 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Actes Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92828 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24926-01 CG1996 Livre Centre de documentation Congrès Disponible La prise en compte des risques naturels majeurs dans les Alpes-Maritimes / Andrée Dagorne in Analyse spatiale quantitative et appliquée, vol 1996 n° 38-39 (01/06/1996)
[article]
Titre : La prise en compte des risques naturels majeurs dans les Alpes-Maritimes Type de document : Article/Communication Auteurs : Andrée Dagorne, Auteur ; Jean-Yves Ottavi, Auteur Année de publication : 1996 Article en page(s) : pp 167 - 182 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie thématique
[Termes IGN] Alpes-maritimes (06)
[Termes IGN] cartographie des risques
[Termes IGN] érosion
[Termes IGN] incendie de forêt
[Termes IGN] montagne
[Termes IGN] plan d'exposition aux risques
[Termes IGN] plan de prévention des risques
[Termes IGN] risque majeur
[Termes IGN] risque naturelRésumé : (Auteur) La loi n° 95-101 du 2 février 1995 prévoit le renforcement de la protection de l'environnement et la mise en route de Plans de Prévention des Risques prévisibles (PPR). En vue de la mise en application de cette loi dans le département des Alpes-Maritimes, il est ici proposé de faire le bilan des travaux faits à différentes échelles spatio-temporelles et utilisant des données multi-sources, trandisciplinaires, ainsi que les techniques modernes de la télédétection, des Systèmes d'Information Géographique (SIG), un réseau plus dense de stations d'enregistrement des données sismiques (TGRS), un système de localisation par GPS, etc. La démarche requiert une confrontation avec le terrain, la prise en compte des travaux de recherche fondamentale des géomorphologues et de l'histoire de l'occupation du sol marquée par les travaux d'aménagement des pentes réalisés par les anciens et d'importants travaux exécutés par les forestiers dans le cadre de la Restauration des Terrains en Montagne. Numéro de notice : A1996-056 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25840
in Analyse spatiale quantitative et appliquée > vol 1996 n° 38-39 (01/06/1996) . - pp 167 - 182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 247-96011 RAB Revue Centre de documentation En réserve L003 Disponible L'aménagement des zones marneuses dans les bassins versants des montagnes de l'atlas tellien semi-aride / H. Vogt (1996)
Titre : L'aménagement des zones marneuses dans les bassins versants des montagnes de l'atlas tellien semi-aride Type de document : Monographie Auteurs : H. Vogt, Auteur ; et al., Auteur Editeur : Eschborn : Deutsche Gesellschaft für Technische Zusammenarbeit GTZ Année de publication : 1996 Importance : 142 p. Format : 15 x 21 cm + 13 petites cartes Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géographie mondiale
[Termes IGN] Algérie
[Termes IGN] Argile
[Termes IGN] bassin hydrographique
[Termes IGN] crue
[Termes IGN] digue
[Termes IGN] érosion
[Termes IGN] Maghreb
[Termes IGN] montagne
[Termes IGN] planification
[Termes IGN] pluie
[Termes IGN] population
[Termes IGN] ruissellement
[Termes IGN] zone inondable
[Termes IGN] zone semi-arideNuméro de notice : 65792 Affiliation des auteurs : non IGN Nature : Recueil / ouvrage collectif Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44487 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 65792-01 60.11 Livre Centre de documentation En réserve M-103 Disponible Atlas thématique de l'environnement marin en baie de Saint-Brieuc (Côtes-d'Armor) / C. Augris (1996)
PermalinkSurveillance des sols dans l'environnement par télédétection et Systèmes d'Information Géographiques / R. Escadafal (1996)
PermalinkExtraction automatique d'informations géomorphométriques (réseaux et surfaces enveloppés) à partir de modèles numériques de terrain / J. Carvalho (1995)
PermalinkInsulaire 23 [observatoire topographique sur les évolutions de la baie du Mont-Saint-Michel de 1991 à 1995] / D. Deleaz (1995)
PermalinkPermalinkPermalinkPermalinkDéveloppement d'un outil d'aide à la décision en matière de défrichements à vocation agricole / R. Laplana (1993)
PermalinkEtude écologique des vallées fluviales par télédétection, projet SPOT 4/MIR (91/CNES/0434) "évaluation de la bande TM5 pour la cartographie morphohydrogéologique de la moyenne vallée de la Garonne" / E. Muller (1993)
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