888 research outputs found
Evaluating the Available Regional Groundwater Resources using the Distributed Hydrogeological Budget
No full textIn this study, several hydrogeological catchments of Central Italy have been characterized focusing the attention on the presence of areas in which, over the last two decades,the hydrological equilibrium between recharge and discharge (phenomena of marked reduction of spring discharge and progressive drawdown of groundwater levels) has been compromised
by overexploitation of groundwater resources. A GIS system has been used in order to develop the study and the homogenous distribution of the hydrological knowledge and of the existing imbalances has been performed. Characterizing elements of the research are: a) the definition
of the hydrogeological units; b) the hydrogeological survey of around a thousand water-points;
c) the monthly analysis of climatic data of numerous survey stations; d) the census and the recording of water concessions; e) the evaluation of agriculture hydro-exigency derived from
the analysis of the use of soil; f) the withdrawals defined by a statistic analysis of data. These
elements have allowed to define the Distributed Hydrogeological Budget which is a useful instrument to evaluate critical areas
Carta Idrogeologica di Roma - Hydrogeological Map of Rome - Scala-Scale 1:50.000
No full textLa storia millenaria di Roma e indissolubilmente legata al rapporto della citta con l’acqua. Roma citta di acquedotti, di terme e di fontane, di fiumi e di mare, rinsalda oggi il suo legame con le acque sotterranee consegnando al mondo scientifico, professionale e a tutti i cittadini che vorranno liberamente usufruirne la sua nuova Carta Idrogeologica. Per questo ed altri motivi, sono particolarmente fiera del percorso intrapreso e del risultato raggiunto. La nuova carta e frutto della collaborazione tra l’Amministrazione di Roma Capitale ed una vasta rappresentanza del mondo scientifico. Una collaborazione, tengo a sottolineare, del tutto inedita e non onerosa in termini economici in quanto nata con la volontà condivisa, istituzionalizzata con un protocollo d’intesa, di mettere a disposizione della collettività le più rilevanti conoscenze del settore. I dati messi a disposizione dai Dipartimenti “Tutela Ambientale” e “Programmazione ed Attuazione Urbanistica” di Roma Capitale sono confluiti nell’ampio bagaglio di conoscenze del mondo universitario e della ricerca, cosi da conferire alla nuova Carta Idrogeologica di Roma un indubbio carattere sperimentale da un lato, e molteplici elementi di innovatività dall’altro, anche grazie all’utilizzo della più aggiornata cartografia geologica di Roma come base e di nuovi rilievi in sito. Tengo poi ad evidenziare che l’elaborazione di questa nuova carta nasce e si affianca ad una serie di ulteriori progetti in tema di acque sotterranee che ho sempre sostenuto sin dall’inizio del mio mandato, e che sono in corso di realizzazione presso il Dipartimento Tutela Ambientale di Roma Capitale, a testimonianza di un rinnovato impegno di questa Amministrazione in tema di tutela delle acque e sostenibilità nell’impiego della risorsa. Progetti tutti caratterizzati da forti interconnessioni e molteplici finalità di utilizzo, ai quali la predisposizione di questa carta dara sicuramente un grande impulso. Con questo strumento di base sarà da oggi più semplice acquisire informazioni preliminari utili, ad esempio, a definire la migrazione di eventuali sostanze inquinati che dovessero interessare le falde acquifere, ma sarà anche più facile affrontare con maggiore consapevolezza le nuove sfide che lo sviluppo delle opere in sotterraneo della citta pone ogni giorno. Il documento inoltre e un’utile base conoscitiva per potenziare politiche di sfruttamento di risorse energetiche rinnovabili quali quelle dell’energia geotermica a bassa entalpia. Nell’ambito della strategia di resilienza poi, che questa Amministrazione sta pianificando, un intero filone tematico riguarda l’acqua, intesa in tutte le sue manifestazioni, superficiali e sotterranee. La Carta Idrogeologica costituisce un elemento informativo di base importantissimo per questo scopo. Un esempio virtuoso quindi ed un grande contributo per la nostra citta per cui mi sento di ringraziare vivamente tutti quanti vi hanno contribuito ed in particolare, oltre al Servizio Bonifica Siti Inquinati e Geologia Ambientale e gli altri Uffici di Roma Capitale, il Dipartimento di Scienze dell’Università degli Studi Roma Tre, il Servizio Geologico d’Italia - ISPRA, il CNR-IGAG, il CERI - Sapienza e l’INGV.The millenary history of Rome is inextricably linked to the relationship of the city with the water. Rome city of aqueducts, of spas and fountains, rivers and sea, today strengthens its ties with groundwater delivering to the scientific and professional world and to all citizens who want to freely use, its new Hydrogeological Map. For this and other reasons, I am particularly proud of the path taken and the achieved result. The new map is fruit of the collaboration between the Administration of Roma Capitale and a wide representation of the scientific world. A partnership, I want to emphasize, entirely new and not onerous in economic terms, as born with the shared will (institutionalized with a protocol agreement) of providing the community the most relevant industry insights. Data provided by the “Environmental Protection” and “Urban Planning” Departments of Roma Capitale flowed in the large store of knowledge of the academic and research world, so to confer to the new Hydrogeological map of Rome an undoubted experimental character, on one hand, and multiple innovative elements the other, also thanks to the use of the most recent geological map of Rome as the base, and new site surveys. I want then to highlight that drawing up this new map is born and joins to a series of other projects in the field of groundwater that I have always supported from the beginning of my mandate, and that are being implemented at the Environmental Protection Department of Roma Capitale, testifying to a renewed effort of this Administration in terms of water protection and sustainability in the use of the resource. All these projects are characterized by strong interconnections and multiple purposes of use, to which the predisposition of this map will surely give a great impulse. With this basic tool is now easier to acquire preliminary useful information for example to define the migration of any contaminant that may affect groundwater, but it will also be easier to deal with greater awareness the new challenges that the development of underground works of the city puts each day. The document is also a useful knowledge base for policies to enhance the exploitation of renewable resources such as low enthalpy geothermal energy. Within its strategy of resilience that the Administration is planning, an entire thematic strand relates the water, seen in all its manifestations, from surface to groundwater. The Hydrogeological Map constitutes a basic informative element important for this purpose. A virtuous example and therefore a great contribution to our city for which I would sincerely thank all those who have contributed and in particular, in addition to the Contaminated Sites Remediation and Environmental Geology Service and the other offices of Roma Capitale, the Science Department of RomaTRE University, Geological Survey of Italy - ISPRA, the CNR-IGAG, the CERI - Sapienza and the INGV
Hydrogeology of the southern Middle Tiber Valley.
No full textThe aim of this work is to contribute to the hydrogeo-logical knowledge regarding the southern Middle Tiber Valley fo-cusing on the continental and marine units that fillthe Paglia-Tiber graben in the northern Latium Region (central Italy). An important hydrogeological survey was performed in the summer of 2008, and a considerable quantity of piezometric, physio-chemical and flowdata were collected. Four geological cross sections were realized, and a hydrogeological map and a groundwater quality map of the area were produced to obtain a conceptual groundwater flow model
Uso, manejo e caracterização de agricultores e de variedades locais angolanas de feijão macunde (Vigna unguiculata (L.) WALP.)
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias. Programa de Pós-Graduação em Recursos Genéticos Vegetais.O Centro Nacional de Recursos Fitogenéticos (CNRF) tem conservado em seu banco de germoplasma cerca de 2821 amostras de variedades locais de culturas alimentares, entre os quais, 313 são amostras de Vigna unguiculata (L.) Walp, conhecida em Angola por feijão macunde. Esses genótipos estão esperando por estudos de caracterização para o uso e melhoramento dessa cultura. É uma cultura amplamente distribuída no mundo, extremamente rústica, bem adaptadas a amplas condições de solo e tolerante a ampla faixa de temperatura. É fonte de proteínas de baixo custo, notadamente, para as populações carentes. O presente trabalho teve como objetivo caracterizar os produtores de feijão macunde de Angola e de variedades locais. A metodologia proposta para caracterizar as famílias produtoras desta leguminosa foi o da aplicação de um questionário semi-estruturado. Para a caracterização fenológica, morfológica e agronômica, foi realizado um ensaio no campo experimental do CNRF em Angola. Foram avaliadas 20 variedades locais de feijão macunde, em um ensaio com delineamento de blocos ao acaso, com quatro repetições. Foram adotados os descritores da cultura do feijão macunde do IBPGR (1983). Os resultados mostraram que a maior parte das famílias entrevistadas pratica agricultura de subsistência, em áreas de propriedades que variam entre um e três hectares, utilizando preferencialmente instrumentos manuais simples. O feijão macunde é cultivado em área menor de 1 hectare e geralmente consorciado com o milho, mandioca e massambala (sorgo). Em relação ao estudo de caracterização fenológica, morfológica e agronômica, os resultados mostraram que a maioria de acessos possui ciclo reprodutivo precoce com existência de diferenças significativas entre as variedades indicando a existência de grande diversidade das variedades associadas à maioria das variáveis analisadas. The National Center of Plant Genetic Resources (CNRF) conserves in its bank of germoplasm about 2821 samples of local varieties of food crops of which 313 are samples of Vigna unguiculata (L.) Walp, known in Angola as macunde. These genotypes are waiting for studies of characterization necessary before their use in breeding programs. The species is widely distributed in the world. Because of its extreme rustic it's well adapted to different soil types and tolerant the a wide range of temperatures. It is a main source of proteins for poor people. The present work aimed to characterize the producers of macunde in Angola and its local varieties. The study of the cowpea growers was based on a semi-structural questionnaire. For the characterization phenological, morphological and agronomic characteristics was done in an experimental field carried out at CNRF in Angola. Twenty local varieties of cowpea were evaluated, in the experiment, in a completely randomized blocks design, with four replications. The IBPGR (1983) cowpea descriptors were used to characteze the varieties. The results showed that most of growers interviewed practice subsistence agriculture, cultivating land, an area of one to three hectares; simple instruments are mostly used. The cowpea cultivated in the area less than one hectar generally was associated with the maize, cassava and massambala (sorghum). Most of the acesses studied showed to be precocious in relation to the reproductive cycle significant differences among varieties were also observed indicating the existence of high degree of diversity of varieties associated to most of the traits studied
Hydrogeology and groundwater quality in the quaternary alluvial deposits of the Cuneo Plain (NW Italy)
No full textThe Distributed Hydrogeological Budget: Methodological Approach To Evaluate The Available Groundwater Resources Of Central Italy
No full textTOMMASO: LA LIBERTA' DELLA DIFFERENZA
No full textIl volume contiene contributi di: Ricoeur P., Sacchi D., Vigna C., Natali C., Bettetini M., Sciuto I., Botturi F., Viola F., Peratoner A., Cortella L., Adinolfi I
Exploring the use of alternative groundwater models to understand the hydrogeological flow processes in an alluvial context (Tiber River, Rome, Italy)
No full textThe first step of the application of a groundwater
model to a specific site is the identification of the
conceptual model. In this paper, a methodology to compare
different conceptual models is proposed. Such a method
consists in the parallel run of simple groundwater models,
based on different conceptual models and in the evaluation
of each model fitting. The case study proposed to illustrate
this approach belongs to the alluvial series of the Tiber
River (Rome, Italy)
A Groundwater Modeling Case-Study with Modflow 2005. The Valco S. Paolo Area (Rome-Italy)
No full textThe Valco S. Paolo site may be regarded as representative of the main Tiber valley in the urban area of Rome, which is located 2 km south of the city center. In recent years, as per level, temperature and electrical conductivity measurements conducted in gravel and sand aquifers have notable variations. For this purpose, heads observed from 15 piezometers and physical characteristic data of sand and gravel aquifers were monitored in 5 piezometers in the Tiber river by dataloggers during 4 months and integrated with available geological and hydrogeological information to develop a conceptual model of the system. These fundamental information are required to characterize the existing groundwater system in this area in order to establish a groundwater flow model. The validation of the conceptual model by a steady-state numerical groundwater flow model reveals that minimum change occur in the center. Trial and Error calibration method has been applied to this model. The calibrated model had been used to simulate a different set of field measurements and the verification showed a good degree of confidence
Il falso nella storia. Il ruolo della falsa coscienza e della coscienza falsa nella “scoperta” dell’America
No full textLa scoperta dell'America, raccontata dai primi esploratori, è anche una grande serie di invenzioni e falsificazioni della realtà. Motivati da interessi contingenti, dalla necessità di colpire l'immaginario dei loro contemporanei europei, o semplicemente vittime di auto-inganno per il desiderio di realizzare i propri sogni di ricchezza e di fama, autori come Colombo o Vespucci produssero un'ampia serie di falsificazioni storiche, che tuttora segnano la storia del Nuovo Mondo
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