Elementi per una carta delle caratteristiche radioattive del suolo italiano     

Prof. Emilio Oddone 《Pure and Applied Geophysics》1940,2(1):142-152

Riassunto In questo rapporto si dimostra l'utilità e la convenienza di compilare una carta radio-geologica d'Italia, fondata, sulle osservazioni italiane opportunamente coordinate. Uno schizzo provvisorio di ricognizione è dato in base alla recente Tabella della radioattività delle roccie dei vari periodi geologici dovuta ai Proff. Stoklasa e Penkava.

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Summary In this Report are pointed out the utility and convenience of tracing a radiogeological map of Italy founded on the Italian observations duly connected. A provisional sketch of recognition is given, based on the recent prospectus of the radioactivity of rocks in different geological periods by Professors Stoklasa and Penkava.

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Zusammenfassung Durch Benützung einer Tabelle des Gehalts in Radium in den verschiedenen Gesteine der Erdkruste, vorbereitet nach den Prof. en Stoklasa und Penkava, wird eine Entwürfskarte der Radioaktivität des italienischen Bodens anfertigt.

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Résumé La note donne un croquis cartographique de la distribution des éléments radioactifs du sol italien d'après les données des proff. Stoklasa et Penkava rélatives à la radioactivité des roches dans les différentes périodes géologiques.

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Seasonal Patterns of Dark Carbon Incorporation by Natural Phytoplankton Assemblages in the Central Cantabrian Sea (Bay of Biscay)     

Emilio  Fernanáez Antonio  Bode 《Marine Ecology》1993,14(2):175-183

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General patterns of circulation, sediment fluxes and ecology of the Palamós (La Fonera) submarine canyon, northwestern Mediterranean     

Albert Palanques  Emilio García-Ladona  Dami Gomis  Jacobo Martín  Marta Marcos  Ananda Pascual  Pere Puig  Josep-Maria Gili  Mikhail Emelianov  Sebasti Monserrat  Jorge Guilln  Joaquín Tintor  Mariona Segura  Antoni Jordi  Simn Ruiz  Gotzon Basterretxea  Jordi Font  Dolors Blasco  Francesc Pags 《Progress in Oceanography》2005,66(2-4):89

Currents, particle fluxes and ecology were studied in the Palamós submarine canyon (also known as the Fonera canyon), located in the northwestern Mediterranean. Seven mooring arrays equipped with current meters and sediment traps were deployed along the main canyon axis, on the canyon walls and on the adjacent slope. Additionally, local and regional hydrographic cruises were carried out. Current data showed that mean near surface and mid-depth currents were oriented along the mean flow direction (NE–SW), although at 400 and 1200 m depth within the canyon current reversals were significant, indicating a more closed circulation inside the canyon. Mean near-bottom currents were constrained by the local bathymetry, especially at the canyon head. The most significant frequency at all levels was the inertial frequency. A second frequency of about three days, attributed to a topographic wave, was observed at all depths, suggesting that this wave was probably not trapped near the bottom. The current field observed during the most complete survey revealed a meandering pattern with cyclonic vorticity just upstream from and within the canyon. The associated vertical velocity ranged between 10 and 20 m/day and was constrained to the upper 300 m. This latter feature, together with other computations, suggests that during this survey the meander was not induced by the canyon but by some kind of instability of the mean flow.In the canyon, suspended sediment concentration, downward particle fluxes, chlorophyll and particulate C and N were significantly higher up-canyon from about 1200 m depth than offshore, defining, along with the different hydrodynamics, two canyon domains: one from the canyon head to about 1200 m depth more affected by the canyon confinement and the other deeper than 1200 m depth more controlled by the mean flow and the shelf-slope front. The higher near-bottom downward total mass fluxes were recorded in the canyon axis at 1200 m depth along with sharp turbidity increases and are related to sediment gravity flows. During the deployment period, the increase in downward particle fluxes occurred by mid-November, when a severe storm took place. On the canyon walls at 1200 m depth, suspended sediment concentrations, downward particle fluxes, chlorophyll and particulate C and N were higher on the southern wall than on the northern wall inversely to the current’s energy. This could be caused by an upward water supply on the southern canyon wall and/or the mean flow interacting with the canyon bathymetry. In the swimmers collected by the sediment traps, the dominant species was an elasipod holothurian, which has not been recorded in other canyons or elsewhere in the Mediterranean, indicating particular speciation.  相似文献   

Experimental Assessment of the Stress–Strain Behaviour of Leighton Buzzard Sand for the Calibration of a Constitutive Model     

Giovanni Lanzano  Ciro Visone  Emilio Bilotta  Filippo Santucci de Magistris 《Geotechnical and Geological Engineering》2016,34(4):991-1012

A number of constitutive models are nowadays implemented in numerical codes which simulate the stress–strain behaviour of soil from very small to large strain. In this paper, the mechanical behaviour of Leighton Buzzard sand (grade E), used worldwide for physical modelling, has been thoroughly characterized by laboratory testing along several stress paths. Tests were aimed at calibrating a constitutive model, that allows considering stiffness nonlinearities in a wide range of strains, in the framework of isotropically hardening plasticity. As a validation, the results of dynamic centrifuge tests on a layer of the same sand were compared with finite element predictions.  相似文献   

Conceptual hydrogeological model of volcanic Easter Island (Chile) after chemical and isotopic surveys   总被引：2，自引：2，他引：0  

Christian Herrera  Emilio Custodio 《Hydrogeology Journal》2008,16(7):1329-1348

Most human activities and hydrogeological information on small young volcanic islands are near the coastal area. There are almost no hydrological data from inland areas, where permanent springs and/or boreholes may be rare or nonexistent. A major concern is the excessive salinity of near-the-coast wells. Obtaining a conceptual hydrogeological model is crucial for groundwater resources development and management. Surveys of water seepages and rain for chemical and environmental isotope contents may provide information on the whole island groundwater flow conditions, in spite of remaining geological and hydrogeological uncertainties. New data from Easter Island (Isla de Pascua), in the Pacific Ocean, are considered. Whether Easter Island has a central low permeability volcanic “core” sustaining an elevated water table remains unknown. Average recharge is estimated at 300–400 mm/year, with a low salinity of 15–50 mg/L Cl. There is an apron of highly permeable volcanics that extends to the coast. The salinity of near-the-coast wells, >1,000 mg/L Cl, is marine in origin. This is the result of a thick mixing zone of island groundwater and encroached seawater, locally enhanced by upconings below pumping wells. This conceptual model explains what is observed, in the absence of inland boreholes and springs.  相似文献   

The Last Appearance Datum of Hipparion in Western Europe: magnetostratigraphy along the Pliocene–Pleistocene boundary in the Villarroya Basin (Northern Spain)     

Emilio L. Pueyo  Arsenio Muñoz  César Laplana  Josep M. Parés 《International Journal of Earth Sciences》2016,105(8):2203-2220

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Wrack Removal as Short-Term Disturbance for <Emphasis Type="Italic">Talitrus Saltator</Emphasis> Density in the Supratidal Zone of Sandy Beaches: an Experimental Approach     

Mª Carmen Ruiz-Delgado  Jenyffer Vierheller Vieira  Mª José Reyes-Martínez  Carlos Alberto Borzone  Juan Emilio Sánchez-Moyano  Francisco José García-García 《Estuaries and Coasts》2016,39(4):1113-1121

A distinctive feature of sandy beaches is the stranded wrack, which represents a key element in the maintenance of their biodiversity and ecosystem function. However, these materials are commonly removed from beaches worldwide. In October–November 2012, a field experiment following an M-BACI design was conducted to assess the effect of wrack removal on sandhopper populations on two sandy beaches on the Atlantic southwest coast of Spain. The beaches, Levante (36°33′N, 6°13′W) and Cortadura (36°28′N, 6°15′W) differed in their morphodynamics (dissipative and intermediate, respectively) and in the dominant wrack sources (seagrasses vs. macroalgae). Wrack removal diminished the density of the sandhopper, Talitrus saltator, a dominant species in the supratidal zone especially under wrack, but the difference between impacted and control plots was short-lived (several days). Juvenile sandhoppers appeared more sensitive to this disturbance than adults, although this was found only at Levante. This study highlights the adaptability of this sandhopper to a single wrack removal event and shows that the magnitude of the effect is likely dependent on the particular characteristics of individual beaches. The consequences of frequent wrack removal from these beaches on sandhopper populations remain to be determined.  相似文献   

Carbon dioxide and helium dissolved gases in groundwater at central Tenerife Island,Canary Islands: chemical and isotopic characterization     

Rayco Marrero-Diaz  Dina López  Nemesio M. Perez  Emilio Custodio  Hirochika Sumino  Gladys V. Melián  Eleazar Padrón  Pedro A. Hernandez  David Calvo  José Barrancos  Germán Padilla  Francesco Sortino 《Bulletin of Volcanology》2015,77(10):1-18

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The historical development of built heritage awareness and conservation policies: a comparison of two World Heritage Sites: Edinburgh and Salvador do Bahia     

Harry Smith  Emilio José Luque-Azcona 《GeoJournal》2012,77(3):399-415

Values regarding built heritage have developed historically in response to both international agendas and local circumstances, and have underpinned the creation of World Heritage Sites and regeneration approaches within these. Such regeneration processes are an arena where different interests meet and often confront each other, with concepts and values of built heritage being used to different ends by the actors involved. However, the origins of conservation concepts and approaches are seldom considered. This paper examines the historical development of built heritage awareness and conservation policies from an institutionalist perspective at the international, European and Latin. American levels. It then considers conservation policies in Scotland and Brazil, particularly in the central areas in Edinburgh and Salvador from the 19th century to the 1970s, and the growing awareness of built heritage among certain sections of society and local institutions in these localities. Finally, the paper analyses the reasons behind, and types of, interventions in Edinburgh’s Old Town and Salvador’s Pelourinho and Maciel neighbourhoods, and the level of awareness of built heritage among the general population in the two cities. The paper draws conclusions on the influence of various factors on the development of approaches to built heritage and on the different ways in which these contributed to a particular awareness of built heritage in Edinburgh and Salvador.  相似文献   

Editorial: Round Robin Tunnel Test (RRTT)   总被引：1，自引：0，他引：1  

Emilio Bilotta  S. P. Gopal Madabhushi  Francesco Silvestri 《Acta Geotechnica》2014,9(4):561-562

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