325,664 research outputs found
“Itinerari turistici per la valorizzazione culturale e ambientale del territorio di Civitavecchia. Prospettive di ricerca”
No full textEvaluation of the deposition, infiltration and drainage of the atmospheric pollutants in the vadose zone
No full textIn the last decades, a large effort has been carried out to reduce atmospheric pollutant emissions in Europe. However, despite the progresses of the last 30 years (Rogora et al., 2016), water and soil acidification, nutrition unbalance in forest trees, and eutrophication in surface waters are still of great concern. In particular, nutrients that fall on the ground from the atmosphere represent a minor component of the total nitrogen input to soils, especially when compared to agricultural, civil and industrial inputs (EEA, 2005). Although often underestimated, this source apportionment becomes a part of leaching from the soil to groundwater. Therefore, the overarching goal of this study is to identify anthropogenic background values of pollutants in groundwater, not related to direct sources of contamination (e.g., industrial wastes, leakages from sewage systems, fertilizers)
Urban impacts on air quality observed with remote sensing and ground station data from the PO plain field campaign
No full textThe Po Plain area is one of the most urbanized and polluted regions in Europe, with the city of Milan being a major “hot spot” of nitrogen dioxide (NO2) in the world. The Po Plain Experiment Field Campaign has been carried out to identify and understand impacts of urban characteristics on the environment across the Po Plain in Northern Italy. Air quality is investigated with both remote sensing and ground station data. Preliminary results show a moderate correlation between satellite observations and ground-based measurements, highlighting the close relationship between the urban pattern and the distribution of NO2 all over the region
Nuclear Data for Advanced Mox Fuels - Chapter C: Evaluations of Fundamental Data Files
No full textThis study on Supporting Nuclear Data for Advanced MOX Fuels was performed in the framework of the specific programme on Nuclear Fission Safety of the Framework Programme for the European Atomic Energy Community (1994-1998), under contract number F141 CT 95 0002, by BELGONUCLEAIRE, SCK.CEN, ECN (now NRG), CEA, ITU and ENEA under the co-ordination of BELGONUCLEAIRE (Mr. S. Pilate). It supports the larger study entitled Evaluation of Possible Partitioning and Transmutation Strategies and of Means for Implementing them performed in parallel under Contract number F141-CT95-0006, which includes scenarios of actinide recycling in thermal reactors (PWRs) and fast reactors. This final report is subdivided into 3 chapters: A. Evaluation of MOX Fuel Irradiations in Thermal Reactors B. Evaluation of MOX Fuel Irradiations in Fast Reactors C. Evaluations of Fundamental Data Files
Atmospheric nitrogen deposition in a highly human impacted area in northern Italy
No full textNitrogen can enter the water cycle through atmospheric depositions on ground and water surfaces, leakages from point and diffuse sources (i.e., sewage treatment plants or sewage systems, fertilizer and manure applications), and erosion processes affecting nitrogen rich soils (EEA, 2005). However, integrating all nitrogen forms, processes and scales is still a major challenge for the understanding and the management of the nitrogen cycle
The effects of an infiltration basin on groundwater: quantitative aspects (River Arno - Lonate Pozzolo, VA)
No full textPotenzialità ambientali e socioeconomiche di un territorio montano abruzzese: la Valle Roveto
No full textRiflettendo sui contesti. Il contributo dell'archeologia alla conoscenza di S. Lorenzo e delle sue vicende
No full textRiesame critico del contesto di ritrovamento dei sarcofagi presso s. Lorenzo, che si ritiene escludere la giacitura primaria e la pertinenza alla facies romana della città, diversamente da quanto sostenuto in pubblicazioni recent
The Use of the Weights-of-Evidence Modeling Technique to Estimate the Vulnerability of Groundwater to Nitrate Contamination
No full textThe occurrence of elevated nitrate (NO 3 - ) concentration in the aquifer of the Province of Milan (northern Italy) is related to both natural and anthropogenic variables. Using the weights-of-evidence modeling technique a specific vulnerability assessment has been performed. This study presents an evolution of previous applications of the proposed methodology as a consequence of an updating of the available database, in terms of data type, quality, and accuracy, and of a more specific and enhanced statistical controls onto the final results. A comparison between the spatial distribution of vulnerability classes and the frequency of occurrences of nitrate in wells shows a high degree of correlation, both for low and high nitrate concentration. Similar results may be evidenced considering the correlation between posterior probability classes and mean nitrate concentrations in wells located in each of these classes: a high R 2 value (0.99) and the agreement with the threshold concentration value used to define prior probability testifies a general good quality of results. Groundwater-specific vulnerability has been classified in terms of vulnerability classes and, according to the outcomes of the model, the density of population can be considered the most impacting source of nitrate. Mean annual irrigation and groundwater depth can be identified as influencing factors in the distribution of nitrate, while agricultural practice appears a negligible factor
Use of scatterometer data in groundwater vulnerability assessment
No full textLombardy in Italy has been selected as a case study to evaluate the capability of the QuikSCAT - Dense Sampling Method (QSCAT-DSM) data in delineating urban extent, estimating rate of urban changes, and assessing aquifer vulnerability, in particular to investigate the relationship between land-use changes and groundwater contamination. QSCAT-DSM data represent an innovative approach to delineate urban and interurban areas with satellite scatterometer data. Radar backscatter acquired by the SeaWinds scatterometer aboard the QSCAT satellite together with the DSM are used to identify and map surface features at a posting scale of about 1 km2. Through the spatial statistical methods Weight of Evidence (WofE), both urban changes given by QSCAT-DSM data and population changes in the decade of the 2000's have been correlated to nitrate concentration trend in groundwater in the same time period. Both analyses based on urban change and on population change lead to the same result: urban nitrate sources in Lombardy increase the level of nitrate concentration in groundwater, indicating a degradation of the water quality. Moreover, QSCAT-DSM data proved to be a reliable tool for evaluating urban changes continuously without a temporal or spatial gap, and to be a strategic variable allowing the assessment of groundwater vulnerability consistently throughout the decadal time scale
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