1,721,088 research outputs found
Groundwater vulnerability assessment at the tectonic boundary of a karst aquifer (L’Aquila-Scoppito Plain, Central Italy)
No full textGroundwater resources and human impacts in a Quaternary intramontane basin: the case study of the L'Aquila Plain (Central Italy).
No full textGROUNDWATER RESOURCES OF INTRAMONTANE BASIN IN KARST REGION: CASE-STUDY OF l'AQUILA-SCOPPITO BASIN(ABRUZZO, ITALY)
No full textIdrodinamica sotterranea del massiccio del Gran Sasso (Abruzzo): nuove indagini idrologiche, idrogeologiche e idrochimiche (1994-2001
No full textKarst aquifer characterization using physico-chemical spring data, Gran Sasso, Central Italy
No full textSeismic site characterisation of Red Soil and soil-building resonance effects in L’Aquila downtown (Central Italy)
No full textWe present a fine-scale shallow geological setting and its possible influence on the seismic building behaviour of L’Aquila downtown which suffered many casualties and building damage caused by the 6 April 2009, Mw 6.1 earthquake. This study draws mainly on the integration of 666 borehole logs and 274 microtremor recordings interpolated with GIS-based techniques. The shallow geology of L’Aquila downtown is characterised by Middle Pleistocene calcareous L’Aquila breccias. Their top surface consists of a weathered epikarst zone that is mantled by Red Soil (reddish colluviated Alfisols) formed during the late Pleistocene. The areal distribution and thickness of Red Soil are causative of the medium microtremor frequency (3–13 Hz). The map of cross-correlation between the medium frequencies, estimated through the empirical Eurocode 8 equation, shows buildings with possible seismic coupling due to the shallow geology setting and the fundamental building period. This technique is further supported by the areal distribution of seismic building damages caused by the 2009 and 1703 L’Aquila earthquakes. This approach, carried out with a large geological and geophysical dataset, is useful in defining seismic site effects and may be effective in mitigating the seismic risk of cities with notable historical heritage in Central Italy, such as the L’Aquila downtown area
Valutazione del rischio di inquinamento degli acquiferi in presenza di siti contaminati: la carta della vulnerabilità della piana dell’Aquila
No full textSeismic microzonation studies by using the equivalent linear approach (L’Aquila, central Italy)
No full textThis contribution is part of the third level Seismic Microzonation project activities carried out on pilot areas of L'Aquila Municipality area and financed by the Abruzzo Region (Department of Government of the Territory and Environmental Policies - Risk Prevention Service of Civil Protection). L’Aquila Municipality area pertains geologically to the middle Aterno River intermontane basin which was filled up by Plio-Quaternary coarse- and fine-grained detrital deposits related mainly to lacustrine, slope and alluvial environments. It is characterised furthermore by a notable seismic hazard as showed by the recent April 6, 2009 Mw 6.29 near source earthquake and the far field Central Italy 2016 seismic sequence. According to the Italian Civil Protection Department guidelines numerical maps and database were produced at the end of the third level Seismic Microzonation project. The project was realized through the following activities: (i) update of database concerning boreholes, geotechnical and geophysical in-situ investigations; (ii) far field and near source seismic input selection; (iii) computer code selection; (iv) geophysical and geotechnical soil characterization; (v) definition of the geological sections; (vi) 1D and 2D modelling; (vii) mapping the third level Seismic Microzonation zones based on the calculated Amplification Factors; (viii) third level Seismic Microzonation numerical maps elaboration. Considering the complex seismostratigraphy of L'Aquila Municipality area, 2D modeling was carried out on a very large number of sections to calculate in-depth the AFs and analyze their areal variation. The nonlinear soil behaviour is taken into account by performing equivalent linear simulations. The validity of 2D modelling was confirmed by the congruence between the geological background and the AFs value distribution. The 2D modelling allowed to verify the existence of basin and basin edge effects via the comparison with 1D simulations (Preturo-Sassa area). In the Bazzano-Monticchio area crossing the Aterno R. plain, the AF values increase for the intervals of the higher periods which could be possibly linked to 2D effect
The steroidogenic possibilities of ovarian and interrenal tissues of the female stickleback (Gasterosteus aculeatus L.) during the annual cycle:histochemical and ultrastructural observations.
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