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Gianluigi Di Paola Pietro Patrizio Ciro Aucelli Guido Benassai Germán Rodríguez 《Natural Hazards》2014,71(3):1795-1819
This paper presents a new method for coastal vulnerability assessment (CVA), which relies upon three indicators: run-up distance (as a measurement of coastal inundation), beach retreat (as a measurement of potential erosion), and beach erosion rate (obtained through the shoreline positions in different periods). The coastal vulnerability analysis of Sele Coastal Plain to storm impacts is examined along a number of beach profiles realized between 2008 and 2009. This particular study area has been selected due to its low-lying topography and high erosion propensity. Results are given in terms of an impact index, performed by combining the response due to coastal inundation, storm erosion, and beach erosion rate. This analysis is implemented on the basis of morphosedimentary characteristics of the beach, wave climate evaluation, and examination of multitemporal aerial photographs and topographic maps. The analysis of the final results evidences different coastal responses as a function of the beach width and slope, which in turn depend on the local anthropization level. The comparison of this method with a Coastal Vulnerability Index method evidences the better attitude of CVA index to take into account the different beach features to explain the experienced damages in specific stretches of the coastline considered. 相似文献
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The brightness distribution of the Sun near the north pole at = 3 and 21 cm is obtained using the results of the partial eclipse of February 25, 1971. The solution obtained by expanding B
(r) in orthogonal polynomials does not show any brightening at either frequency, but a sensible darkening. If this result is explained by the presence of spicules, the coronal emission must be negligible with respect to the emission coming from the transition region. This is possible, at = 21 cm, only if we assume the presence of a coronal hole near the pole. 相似文献
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An exceptionally fast wind (8500 km/s) was suggested to occur in the central star of the planetary nebula K1-16, belonging to the class of the PG 1159 H-deficient pre-white dwarfs. To ascertain the reality of such a fast wind this star has been observed with the HST telescope using the GHRS in the zone of theCiv 155.0 nm doublet. The HST data and tests made using synthetic stellar spectra support the existence of a stellar wind with a terminal velocity of 3800 km/s and a mass loss rate lower thanM<2 · 10–11
M
per year. Possibly it is no longer the fastest stellar wind so far observed but it is still among the fastest. 相似文献
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Michela Izzo Pietro Patrizio Ciro Aucelli Yudith Javier Caridad Pérez Carmen Maria Rosskopf 《Natural Hazards》2010,53(1):139-158
In the period between the end of October and the beginning of November 2007, the Dominican Republic was hit by the tropical
storm Noel, then turned into hurricane in its movement toward the Californian coasts. The passage of Noel was accompanied
by huge precipitation especially in the south-western part of the country. In some areas, the rainfall registered in 6 days
exceeded 700 mm, i.e., more than two-thirds of the mean annual precipitation. The return periods calculated for this rainfall
event vary greatly from region to region: while they locally reach 200 years, such as in San José de Ocoa (50 km west of Santo
Domingo), in other areas, as for instance in the territory of the capital Santo Domingo, return periods do not exceed 20 years.
The tropical storm caused huge damage both in terms of human victims and economic losses, related to diffused inundations
and landslide phenomena, which may be attributed only partially to the exceptionality of the event. As a matter of fact, in
many regions, the inadequate answer of the territory—widely characterized by serious problems of land degradation and an almost
complete lack of territorial planning—appears to be the major responsible for the occurred negative effects. The impact assessment,
based on the calculation of an Impact Index, confirms this statement. 相似文献
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Patrizio Signanini Vittorio D'Intinosante Maurizio Ferrini Mario L. Rainone 《Geotechnical and Geological Engineering》2004,22(2):227-244
In the seismic microzonation the evaluation of the local amplification issue may be solved using different methodological
approaches. Taking the hint from the studies made within VEL project framework, sponsored by Tuscany Region on Fivizzano's
area we are herewith comparing the results of geotechnical and geophysical integrated multidisciplinary studies with the existing
data available from previous studies, mainly using a macroseismic approach, on the same area. This qualitative method does
not seem to be able to make any forecasting on the scale whereas generally microzoning is performed. On the contrary, the
knowledge of the geological-technical model of the investigated area, obtained by punctual multidisciplinary integrated studies,
allows a direct collection of the data to insert in input step of numerical modelling, aimed to local effects evaluation.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Lucia Luzi Sara Lovati Ezio D’Alema Simone Marzorati Domenico Di Giacomo Salomon Hailemikael Ettore Cardarelli Michele Cercato Gerarda Di Filippo Giuliano Milana Giuseppe Di Giulio Mario Rainone Patrizio Torrese Patrizio Signanini Gabriele Scarascia Mugnozza Stefano Rivellino Antonella Gorini 《Bulletin of Earthquake Engineering》2010,8(5):1189-1207
Geological, geophysical and geotechnical investigations, for the characterization of the strong-motion recording sites managed by the Italian Civil Protection, have been carried out in the framework of the project “Italian strong-motion database in the period 1972–2004”. The project aimed at creating an updated database of strong-motion data acquired in Italy by different institutions in the time span 1972–2004, and at improving the quality of disseminated data. This article illustrates the state of the recording site characterization before the beginning of the project, explains the criteria adopted to select the sites where geophysical/geotechnical investigation have been performed and describes the results of the promoted field surveys. 相似文献
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