Principales aspectos de la gestión del agua subterránea en un espacio periurbano del departamento Toay, La Pampa, Argentina

El trabajo caracteriza los principales aspectos inherentes a la gestión del agua subterránea en un es pacio periurbano, con viviendas carentes de redes de saneamiento y distribución de agua potable. Los indicadores urbanísticos muestran un sostenido proceso de ocupación, a partir de la transformación de un estilo residencial de ocupación temporaria en otro, de viviendas con uso permanente. Este escenario requiere ordenar el manejo del recurso hídrico subterráneo, para lo cual se implementó un programa de monitoreo que incluye mediciones de la fluctuación del nivel freático y toma periódica de muestras de agua subterránea. Los registros freatimétricos muestran una profundización del nivel freático mayor a 1 m, con una componente estival, atribuible a la intensificación estacional del bombeo. La caracterización hidroquímica muestra, dados los bajos valores de nitrato, que el acuífero aún no ha sido afectado por la disposición “in situ” de efluentes domiciliarios.The paper deals with some aspects inherent to groundwater management in a peri-urban area, without water supply and sanitation system. Urban indicators show an increasing housing development that requires an adequate groundwater planning. In that sense, began a monitoring program to obtain periodically measurements of water table fluctuations and groundwater samples. Piezometric record shows a downward trend of groundwater level with a seasonal component, related to an intensive exploitation during summer. Hydrochemical data, specially the low concentration of nitrate, indicates that aquifer is not yet contaminated with domestic wastewater.Universidad Nacional de La Plat

Caracterización petrológica y geoquímica de las rocas plutónicas de la Sierra de La Aguada, Provincia de San Luis, Argentina: Implicaciones genéticas con el arco magmático Famatiniano

This study presents a synthesis on the geology of the crystalline complex that constitute the Sierra de la Aguada, San Luis province, Argentine, from an approach based on field relations, petrologic and structural features and geochemical characteristic. This mountain range exposes a basement dominated by intermediate to mafic calcalkaline igneous rocks and peraluminous felsic granitoids, both emplaced in low to medium grade metamorphic rocks stabilized under low amphibolite facies. All this lithological terrane has been grouped in the El Carrizal-La Aguada Complex. Field relations, petrographic characterization and geochemical comparison of the plutonic rocks from the study area with those belonging to the Ordovician Famatinian suit exposed in the Sierra Grande de San Luis, suggest a genetic and temporal relation linked to the development of the Famatinian magmatic arc.El presente trabajo expone una síntesis de la geología que comprende al complejo cristalino que constituye la Sierra de La Aguada, provincia de San Luis, Argentina, desde un enfoque basado en las relaciones de campo, los rasgos petrológico-estructurales y las características geoquímicas. Dicha serranía expone un basamento dominado por rocas plutónicas intermedias-máficas de afinidad calcoalcalina y granitoides félsicos peraluminosos, en conjunto intruidas en metamorfitas de bajo a medio grado metamórfico estabilizadas en condiciones de facies de anfibolita. Todo el conjunto litológico ha sido agrupado dentro del denominado complejo El Carrizal-La Aguada. El análisis de las relaciones de campo, la petrografía y la comparación de las características geoquímicas de las rocas plutónicas del área estudiada y aquellas pertenecientes a la suite ordovícica Famatiniana expuestas en la Sierra Grande de San Luis, sugiere una posible relación genética-temporal vinculada al desarrollo del arco magmático Famatiniano

Second release of the CoRe database of binary neutron star merger waveforms

We present the second data release of gravitational waveforms from binaryneutron star merger simulations performed by the Computational Relativity(CoRe) collaboration. The current database consists of 254 different binaryneutron star configurations and a total of 590 individual numerical-relativitysimulations using various grid resolutions. The released waveform data containthe strain and the Weyl curvature multipoles up to $\ell=m=4$. They span asignificant portion of the mass, mass-ratio,spin and eccentricity parameterspace and include targeted configurations to the events GW170817 and GW190425.CoRe simulations are performed with 18 different equations of state, seven ofwhich are finite temperature models, and three of which account fornon-hadronic degrees of freedom. About half of the released data are computedwith high-order hydrodynamics schemes for tens of orbits to merger; the otherhalf is computed with advanced microphysics. We showcase a standard waveformerror analysis and discuss the accuracy of the database in terms offaithfulness. We present ready-to-use fitting formulas for equation ofstate-insensitive relations at merger (e.g. merger frequency), luminosity peak,and post-merger spectrum.<br

New national and regional Annex I Habitat records: from #60 to #82

New Italian data on the distribution of the Annex I Habitats are reported in this contribution. Specifically, 8 new occurrences in Natura 2000 sites are presented and 49 new cells are added in the EEA 10 km × 10 km reference grid. The new data refer to the Italian administrative regions of Campania, Calabria, Marche, Piedmont, Sardinia, Sicily, Tuscany and Umbria. Relevés and figures are provided as Supplementary material respectively 1 and 2. Copyright Antonio Morabito et al

New national and regional Annex I Habitat records: from #60 to #82

New Italian data on the distribution of the Annex I Habitats are reported in this contribution. Specifically, 8 new occurrences in Natura 2000 sites are presented and 49 new cells are added in the EEA 10 km × 10 km reference grid. The new data refer to the Italian administrative regions of Campania, Calabria, Marche, Piedmont, Sardinia, Sicily, Tuscany and Umbria. Relevés and figures are provided as Supplementary material respectively 1 and 2

L'antico e il moderno

Antico e moderno in Leopard

The case of Phlegraean Fields coastal area on the Mediterranean Sea

The Phlegraean Fields represent a dynamic landscape characterised by interaction between natural phenomena and anthropic factors. Such interaction, however, has showed juxtaposition and heavy alteration in the recent decades instead of sustainable development and respect of landscape identity that is linked to the volcanism and the historical component. Therefore, the current image denotes the subordination of natural and historical components to the anthropic transformations. At present, the ecosystem is highly degraded and fragmented, and it requires effective tools and actions to recover. There would be a great benefit not only from ecological networks in a narrow sense, but also from innovative tools such as green infrastructures, conceived to implement ecosystem services and biodiversity. Archaeology is an essential discipline to comprehend the identity of the Phlegraean Fields. The archaeological interest for this territory noticeably increased in the Renaissance. At that time, architects used to visit the Phlegraean area to study the constructive techniques of the Romans, whose ruins did not show as many alterations as the ones occurred in Rome during the Late Antiquity and the Middle Ages, but only a process of natural ageing and the consequences of volcanic phenomena. The Phlegraean Fields are also well known for their peculiar land morphology, mainly shaped by the intense volcanism. It has created several landmarks and it is still active in secondary events such as Pozzuoli’s Solfatara and the springs of Agnano’s Baths. It would be sensible to pose a question on which of those hallmarks are still contributing to qualify the Phlegraean landscape. Urban sprawl has changed the physiognomy of the settlements and the territory itself. Data on the land use prove that the two halves of the 20th century were characterised by different phenomena. Between 1900 and 1954, woodland surface decreased of 30% and some 10% of lake shores were lost in favour of crops, but only 7.5% of agricultural land was urbanised; pastoralism ceased. Later, in the period 1954-1998 urban surface quintuplicated, partly due to unplanned or unauthorized new developments; agricultural land drastically decreased and the surface of uncultivated areas was nearly eight times as large. However, it must be noted that the since the 1990s some natural areas of the territory were protected by law (Regional Park of Phlegraean Fields). The recent two decades have shown the slowdown of population trends and other kinds of urban transformation, such as disuse of factories, revitalisation of historic centres, yet far from activating a “sustainable urban metabolism”. Despite the chaotic urban sprawl, which may threaten the very existence of the environmental and cultural heritage, it is still possible to observe volcanic and water landscapes of outstanding beauty, glimpses of sunsets on tufa cliffs, sudden finds of huge Roman cisterns and other monuments, orchards and vines, woods and Mediterranean scrub. The three main archaeological settlements of Cuma, Puteoli-Pozzuoli, and Baia-Bacoli-Misenoare located inthe three most representative Phlegraean municipalities (Pozzuoli, Bacoli, and Monte di Procida), but not necessarily each cultural park is fully comprised in one territory. Such circumstance, together with the overall geomorphological features, contribute to envisage an overall district concept of the area rather than individual development proposals

On the use of continuum Finite Element and Equivalent Frame models for the seismic assessment of masonry walls

The assessment of the seismic vulnerability of masonry buildings requires reliable and computationally efficient numerical models. Different modelling strategies can be adopted when studying the global response of these structures, such as Continuum Constitutive Laws Models (CCLM) belonging to Finite Element (FE) models, which may be very accurate but whose use in practice presents several issues (high computational burden, requirement of many input data), and Equivalent Frame (EF) Models, that, even if based on strong simplifications, are now widespread in engineering practice, thanks to their computational efficiency and the need of few mechanical parameters for the structural analysis. The paper discusses the consistent use of these modelling techniques for the seismic analysis of masonry structures. To this aim, a comparison of two approaches (CCL and EF models) is presented focusing at first the attention on the calibration of the constitutive laws through analyses on single panels and then moving to the validation of some simplified assumptions made in the EFM through the analysis of a 2D regular URM wall. For the aim of validation, the CCL model is considered as the reference solution making an accurate comparison with the EF model in terms of generalized forces, drift and damage occurred at element scale and of pushover curve at global scale