排序方式: 共有49条查询结果,搜索用时 15 毫秒
21.
Gonzalo Malvárez Fatima Navas Emilia Guisado-Pintado Derek W.T. Jackson 《地球表面变化过程与地形》2019,44(8):1647-1658
The complex morphodynamic interactions between nearshore, shoreface and dune systems are usually simplified by studying these zones and their associated processes in isolation. However, the established relationships between each of them suggests that an integrated approach is required to examine the genesis, evolution and adaptation of the entire morphodynamic system. The Cabopino dune system in the southern Spanish Mediterranean Sea provides a clear example of a linked morphodynamic system in which a relatively large dune system has been generated and grown through the supply of sediments from an adjacent littoral supply environment. Here, we present a conceptual model of how the nearshore has provided suitable conditions for beach and dune development. We purport that synchronization of sediment activation in the marine and aeolian sections of the system have played a major role in this microtidal setting in which temporal aspects are not only tied to storm action, but to large sedimentary features moving alongshore. © 2019 John Wiley & Sons, Ltd. 相似文献
22.
Benkhattab Fatima Zahra Hakkou Mounir Bagdanavičiūtė Ingrida Mrini Abdelmounim El Zagaoui Hafid Rhinane Hassan Maanan Mehdi 《Natural Hazards》2020,104(1):519-536
Natural Hazards - Analyzing and understanding coastline variability and dynamics are important for scientists and policy-makers. This study investigates the long-term process of shoreline change... 相似文献
23.
24.
25.
Modelling of rutting of two flexible pavements with the shakedown theory and the finite element method 总被引:1,自引:0,他引:1
Cyrille Chazallon Georg Koval Pierre Hornych Fatima Allou Saida Mouhoubi 《Computers and Geotechnics》2009
This paper presents a finite element program, for the modelling of rutting of flexible pavements. In its present version, the program incorporates a permanent deformation model for unbound granular materials based on the concept of the shakedown theory developed by Zarka for metallic structures under cyclic loadings and has been used to estimate the permanent deformations of unbound granular materials (UGM) subjected to traffic loading. The calculation is performed in two steps: the first step consists in modelling the resilient behaviour of the pavement in 3D, using non-linear elastic models, to determine the stress field in the pavement. Then stress paths are derived and used to calculate the permanent deformations and the displacements, using a Drucker–Prager yield surface. An application to the prediction of the permanent deformations of experimental pavements with an unbound granular base, tested on the LCPC pavement testing facility is presented. 相似文献
26.
Besser Houda Mokadem Naziha Redhouania Belgacem Rhimi Nacira Khlifi Faten Ayadi Yosra Omar Zohra Bouajila Abdelhakim Hamed Younes 《Arabian Journal of Geosciences》2017,10(16):1-18
Arabian Journal of Geosciences - The present work is concerned with the valorization of clay minerals of the Aleg formation (Coniacian-middle Campanian) in the clinker manufacturing. The studied... 相似文献
27.
Santos A. Miguel P.; de Fatima Borges Maria; Groom Steve 《ICES Journal of Marine Science》2001,58(3):589-596
28.
Ana I. Gómez de Castro Javier Lopez-Santiago Paola Sestito Victor Rodrigo Gudiel Fatima López Martínez Elisa de Castro Manuel Cornide Javier Yañez Gestoso 《Astrophysics and Space Science》2011,335(1):97-103
The Gould Belt is the local superassociation of star formation. The age of the Belt is some few 107 yr, henceforth, its population is dominated by luminous young OB associations and low mass pre-main sequence stars. Attempts
to unveil the low mass population have been run making use of the ROSAT all-sky survey. The all sky ultraviolet survey run
by the GALaxy Evolution eXplorer (GALEX) maps several regions in the Belt. In this contribution, we present the preliminary
analysis of the UV stellar population towards the Taurus region, one of the nearest and best studied regions of star formation. 相似文献
29.
This study evaluates the synoptic features and environmental conditions of Brahmanbaria tornado event that caused 36 fatalities, 388 injuries and huge damages of properties on 22 March, 2013. Various factors for initiation of that terrific event are investigated through analysis JRA-55 reanalysis (50 km horizontal resolution) data and Multi-functional Transport Satellite images by Japan Meteorological Agency. In addition, radar images, radiosonde data and three hourly synoptic data of Bangladesh Meteorological Department are used to verify the reanalysis data. The genesis of the tornadic storm is identifiable in the most unstable part of the study region. The satellite observations are found to useful to identify the location of convection occurrence region. The half hourly satellite images identify that the convection initiation started at the convergence area and the systems intensify and organize by the continuous moisture supply from the Bay of Bengal. Lower-level convergence coupled with strong wind shear and humidity gradient lift moist air aloft to trigger deep convection and the severe storm occurred. Energy Helicity Index seems a good predictor parameter for this specific case study. 相似文献
30.