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Effect of slope steepness parameter computations on soil loss estimation: review of methods using GIS / Mehandra Nakil in Geocarto international, Vol 31 n° 9 - 10 (October - November 2016)
[article]
Titre : Effect of slope steepness parameter computations on soil loss estimation: review of methods using GIS Type de document : Article/Communication Auteurs : Mehandra Nakil, Auteur ; Mohan Khire, Auteur Année de publication : 2016 Article en page(s) : pp 1078 - 1093 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse comparative
[Termes IGN] barrage
[Termes IGN] érosion
[Termes IGN] érosion hydrique
[Termes IGN] Inde
[Termes IGN] pente
[Termes IGN] surveillance géologique
[Termes IGN] système d'information géographiqueRésumé : (auteur) In the analysis of soil loss equation, the researchers have suggested two methods of deriving the slope steepness parameter. One method is having percentage slope term, while the other method is having sinθ as its term. In this paper, both the methods were analysed and compared in soil loss computation using Revised Universal Soil Loss Equation, over a Gangapur catchment area in India, having steep slopes. The soil loss rates derived were 0.98 million tonnes per year in case of steepness parameter derived by sinθ and 1.226 million tonnes per year in case of steepness parameter derived by percentage slope term. The observed rate of soil loss is 1.23 million tonnes per year. This methodology of soil loss estimation was also validated with similar catchment of Punegaon dam. It is concluded that for medium to steep terrain, percentage slope method estimates more accurate soil loss than other empirical methods for slope steepness estimation. Numéro de notice : A2016-675 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/MATHEMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2015.1120349 Date de publication en ligne : 29/12/2015 En ligne : http://dx.doi.org/10.1080/10106049.2015.1120349 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81925
in Geocarto international > Vol 31 n° 9 - 10 (October - November 2016) . - pp 1078 - 1093[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2016051 RAB Revue Centre de documentation En réserve L003 Disponible Estimating the rainfall erosivity for management planning in the Eastern Desert, Egypt / Kh. M. Darwish in Geocarto international, Vol 31 n° 9 - 10 (October - November 2016)
[article]
Titre : Estimating the rainfall erosivity for management planning in the Eastern Desert, Egypt Type de document : Article/Communication Auteurs : Kh. M. Darwish, Auteur ; W.A.M. Abdel Kawy, Auteur ; Ahmed A. Afifi, Auteur ; R. Zölitz, Auteur Année de publication : 2016 Article en page(s) : pp 1123 - 1141 Note générale : bibliogrphie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] climat aride
[Termes IGN] désert
[Termes IGN] Egypte
[Termes IGN] érosion hydrique
[Termes IGN] modèle RUSLE
[Termes IGN] planification
[Termes IGN] sol
[Termes IGN] système d'information géographiqueRésumé : (auteur) Soil erosion is one of the major causes of land degradation in arid areas. Soil erosion models, e.g. the revised universal soil loss equation (RUSLE), use arithmetical expressions to explore relationships among various processes occurring in the terrain. The established model includes soil parameters, slope, climate and human activities to estimate the water erosion rate and sediment yield. In this study, an approach was adopted to integrate RUSLE model and geographic information system to detect erosion vulnerability and determine the soil erosion risk in the study area. The study area is situated in the Eastern Desert, Egypt. Ground truth data were examined to represent two regions: Luxor-Suhag and Suhag–ElMinya. These regions are exampled by four dry valleys named Sannor, Tarfa, Asyut and Qena, which are planned for agricultural development. The results indicate high risk of water erosion and sediment load discharge into the cultivated land in Luxor–Suhag region. The other region of Suhag–ElMinya is moderately affected by water and sediment load discharge. A higher soil erosion rate was found in Qena wadi followed by Asyut, then Tarfa and Sannur, respectively. Numéro de notice : A2016-676 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2015.1120352 Date de publication en ligne : 29/12/2015 En ligne : http://dx.doi.org/10.1080/10106049.2015.1120352 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81927
in Geocarto international > Vol 31 n° 9 - 10 (October - November 2016) . - pp 1123 - 1141[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2016051 RAB Revue Centre de documentation En réserve L003 Disponible The impact of land use/land cover scale on modelling urban ecosystem services / Darren R. Grafius in Landscape ecology, vol 31 n° 7 (September 2016)
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Titre : The impact of land use/land cover scale on modelling urban ecosystem services Type de document : Article/Communication Auteurs : Darren R. Grafius, Auteur ; Ron Corstanje, Auteur ; Philip H. Warren, Auteur ; Karl L. Evans, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 1509 - 1522 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Environnement
[Termes IGN] analyse de sensibilité
[Termes IGN] données multiéchelles
[Termes IGN] érosion
[Termes IGN] modèle numérique
[Termes IGN] puits de carbone
[Termes IGN] Royaume-Uni
[Termes IGN] service écosystémiqueRésumé : (auteur) Context : Urbanisation places increasing stress on ecosystem services; however existing methods and data for testing relationships between service delivery and urban landscapes remain imprecise and uncertain. Unknown impacts of scale are among several factors that complicate research. This study models ecosystem services in the urban area comprising the towns of Milton Keynes, Bedford and Luton which together represent a wide range of the urban forms present in the UK.
Objectives : The objectives of this study were to test (1) the sensitivity of ecosystem service model outputs to the spatial resolution of input data, and (2) whether any resultant scale dependency is constant across different ecosystem services and model approaches (e.g. stock- versus flow-based).
Methods : Carbon storage, sediment erosion, and pollination were modelled with the InVEST framework using input data representative of common coarse (25 m) and fine (5 m) spatial resolutions.
Results : Fine scale analysis generated higher estimates of total carbon storage (9.32 vs. 7.17 kg m−2) and much lower potential sediment erosion estimates (6.4 vs. 18.1 Mg km−2 year−1) than analyses conducted at coarser resolutions; however coarse-scale analysis estimated more abundant pollination service provision.
Conclusions : Scale sensitivities depend on the type of service being modelled; stock estimates (e.g. carbon storage) are most sensitive to aggregation across scales, dynamic flow models (e.g. sediment erosion) are most sensitive to spatial resolution, and ecological process models involving both stocks and dynamics (e.g. pollination) are sensitive to both. Care must be taken to select model data appropriate to the scale of inquiry.Numéro de notice : A2016-907 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1007/s10980-015-0337-7 Date de publication en ligne : 19/01/2016 En ligne : http://dx.doi.org/10.1007/s10980-015-0337-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83064
in Landscape ecology > vol 31 n° 7 (September 2016) . - pp 1509 - 1522[article]Monitoring of a laboratory-scale inland-delta formation using a structured-light system / Devrim Akca in Photogrammetric record, vol 31 n° 154 (June - August 2016)
[article]
Titre : Monitoring of a laboratory-scale inland-delta formation using a structured-light system Type de document : Article/Communication Auteurs : Devrim Akca, Auteur ; Hansjörg Seybold, Auteur Année de publication : 2016 Article en page(s) : pp 121 - 142 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse comparative
[Termes IGN] analyse diachronique
[Termes IGN] Botswana
[Termes IGN] données spatiotemporelles
[Termes IGN] érosion hydrique
[Termes IGN] géomorphologie
[Termes IGN] modèle numérique de terrain
[Termes IGN] pente
[Termes IGN] sédimentation
[Termes IGN] surveillance géologiqueRésumé : (auteur) A reduced complexity model, which simulates the process of fluvial inland-delta formation, has been developed in a previous study. The results have been compared and validated with a laboratory experiment. This work elaborates the laboratory investigation in which an experimental inland delta is generated and its eroding topography is measured using a structured-light 3D scanner. The least squares 3D (LS3D) co-registration and comparison method is used for alignment as well as for comparing data epochs both spatially and temporally. A spatial precision value of around ±50 μm (1/20 000) is achieved. A series of high-quality digital elevation models (DEMs) are generated and the space-time evolution of the inland delta is monitored and analysed, in terms of slope and topography dynamics, in the consecutive DEM layers. The combination of high-resolution scanning together with high-precision co-registration techniques allows investigation of the details of the space-time variability of the sedimentation-deposition patterns to be used for geomorphological analysis. Numéro de notice : A2016-465 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12149 Date de publication en ligne : 17/06/2016 En ligne : https://doi.org/10.1111/phor.12149 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81470
in Photogrammetric record > vol 31 n° 154 (June - August 2016) . - pp 121 - 142[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-2016021 RAB Revue Centre de documentation En réserve L003 Disponible UAV monitoring of a largescale environmental project / Alan Roberts in GEO: Geoconnexion international, vol 15 n° 5 (May 2016)
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Titre : UAV monitoring of a largescale environmental project Type de document : Article/Communication Auteurs : Alan Roberts, Auteur Année de publication : 2016 Article en page(s) : pp 48 - 49 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] drone
[Termes IGN] dune
[Termes IGN] littoral
[Termes IGN] Pays de Galles
[Termes IGN] sable
[Termes IGN] sédimentRésumé : (éditeur) A sand dune remobilisation and rejuvenation project, believed to be the largest of its kind in the UK, has been undertaken by Natural Resources Wales (NRW). Alan Roberts compares the use of UAV, LiDAR and terrestrial laser scanning surveying techniques for monitoring sediment movement. Numéro de notice : A2016-198 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80633
in GEO: Geoconnexion international > vol 15 n° 5 (May 2016) . - pp 48 - 49[article]Optimal spatial land-use allocation for limited development ecological zones based on the geographic information system and a genetic ant colony algorithm / Nan Mi in International journal of geographical information science IJGIS, vol 29 n° 12 (December 2015)PermalinkApplication of archival aerial photogrammetry to quantify climate forcing of alpine landscapes / Natan Micheletti in Photogrammetric record, vol 30 n° 150 (June - August 2015)PermalinkGround-based multi-view photogrammetry for the monitoring of landslide deformation and erosion / André Stumpf in Geomorphology, n° 231 (15 February 2015)PermalinkVulnérabilités liées à l’eau dans les Andes vénézuéliennes : influences des relations sociétés/hydrosystèmes dans le cas de Santa-Cruz-de-Mora / Frédérique Blot in L'ordinaire des Amériques, n° 218 (2015)PermalinkLe climat de la France au XXIe [21e] siècle, volume 5. Changement climatique et niveau de la mer : de la planète aux côtes françaises / Jean Jouzel (2015)PermalinkDomain-driven co-location mining / Frédéric Flouvat in Geoinformatica, vol 19 n° 1 (January - March 2015)PermalinkL'imagerie spatiale à très haute résolution au coeur du dispositif de geospatial cloud computing Qëhnelö™ : application aux données Pléiades en Nouvelle-Calédonie / Rémi Andreoli in Revue Française de Photogrammétrie et de Télédétection, n° 209 (Janvier 2015)PermalinkSols et environnement, chiffres clés, édition 2015 / CGDD Commissariat Général au Développement Durable (2015)PermalinkInvestigation of scale dependence and geomorphic stages of evolution through hypsometric analysis: a case study of Sirsa basin, western Himalaya, India / P. Dash in Geocarto international, vol 29 n° 7 - 8 (November - December 2014)PermalinkEvaluation of structure from motion for soil microtopography measurement / Sayjro K. Nouwakpo in Photogrammetric record, vol 29 n° 147 (September - November 2014)Permalink