6 resultados para Motori due tempi supercharger alta quota simulazione GT-POWER
em Portal de Revistas Científicas Complutenses - Espanha
Resumo:
The Pico de Navas landslide was a large-magnitude rotational movement, affecting 50x106m3 of hard to soft rocks. The objectives of this study were: (1) to characterize the landslide in terms of geology, geomorphological features and geotechnical parameters; and (2) to obtain an adequate geomechanical model to comprehensively explain its rupture, considering topographic, hydro-geological and geomechanical conditions. The rupture surface crossed, from top to bottom: (a) more than 200 m of limestone and clay units of the Upper Cretaceous, affected by faults; and (b) the Albian unit of Utrillas facies composed of silty sand with clay (Kaolinite) of the Lower Cretaceous. This sand played an important role in the basal failure of the slide due to the influence of fine particles (silt and clay), which comprised on average more than 70% of the sand, and the high content presence of kaolinite (>40%) in some beds. Its geotechnical parameters are: unit weight (δ) = 19-23 KN/m3; friction angle (φ) = 13º-38º and cohesion (c) = 10-48 KN/m2. Its microstructure consists of accumulations of kaolinite crystals stuck to terrigenous grains, making clayey peds. We hypothesize that the presence of these aggregates was the internal cause of fluidification of this layer once wet. Besides the faulted structure of the massif, other conditioning factors of the movement were: the large load of the upper limestone layers; high water table levels; high water pore pressure; and the loss of strength due to wet conditions. The 3D simulation of the stability conditions concurs with our hypothesis. The landslide occurred in the Recent or Middle Holocene, certainly before at least 500 BC and possibly during a wet climate period. Today, it appears to be inactive. This study helps to understand the frequent slope instabilities all along the Iberian Range when facies Utrillas is present.
Resumo:
En el presente trabajo se lleva a cabo el estudio sinfitosociológico de las cuencas alta ymedia del río Curueño (León), en base a la toma de sininventarios de vegetación y se realiza la cartografía de las series presentes en dicho territorio.
Resumo:
Se presenta el mapa de las series de vegetación de la cuenca alta del río Porma: se ha realizado basándose en datos geológicos, bioclimáticos, fitogeográficos y sinfitosociológicos.
Resumo:
In this paper, the vegetal landscape from higher part of Bernesga river (León province) by means of several climatophilous and edaphophilous vegetation series. A mapa of vegetasion series from higher part of Bernesga rrver is presenled.
Resumo:
The distribution and ecology of Brassica oleracea in the atlantic coasts of Iberian Peninsule are studied. A new association or nitrified maritime cliffs is described: Crithmo-Brassicetum oleraceae. This community has been included in the Alliance Crithmo-Armerion due to the high presence of halophitic species.
Resumo:
El litoral de Alicante ha sufrido grandes transformaciones territoriales desde las décadas de 1960 y 1970 a raíz de la actividad turística. Uno de los servicios que necesita esta actividad, entre otros, es el abastecimiento de agua potable. En este sentido, por su papel estratégico, el suministro de agua en alta es decisivo para abastecer a los municipios turístico-residenciales. El objetivo de este estudio es conocer y analizar los diferentes sistemas de abastecimiento de agua en alta en la costa de Alicante, sus características, infraestructuras, recursos hídricos disponibles y medidas de gestión llevados a cabo. Algunas de las conclusiones extraídas son el papel estratégico que ejercen en el territorio, especialmente con el agua, un recurso escaso y de vital importancia para la orla costera alicantina, sobre todo en los meses estivales.
