Rossa A.,ARPAV |
Liechti K.,Swiss Federal Institute of forest |
Zappa M.,Swiss Federal Institute of forest |
Bruen M.,University College Dublin |
And 5 more authors.
Atmospheric Research | Year: 2011
Quantifying uncertainty in flood forecasting is a difficult task, given the multiple and strongly non-linear model components involved in such a system. Much effort has been and is being invested in the quest of dealing with uncertain precipitation observations and forecasts and the propagation of such uncertainties through hydrological and hydraulic models predicting river discharges and risk for inundation. The COST 731 Action is one of these and constitutes a European initiative which deals with the quantification of forecast uncertainty in hydro-meteorological forecast systems. COST 731 addresses three major lines of development: (1) combining meteorological and hydrological models to form a forecast chain, (2) propagating uncertainty information through this chain and make it available to end users in a suitable form, (3) advancing high-resolution numerical weather prediction precipitation forecasts by using non-conventional observations from, for instance, radar to determine details in the initial conditions on scales smaller than what can be resolved by conventional observing systems. Recognizing the interdisciplinarity of the challenge COST 731 has organized its work forming Working Groups at the interfaces between the different scientific disciplines involved, i.e. between observation and atmospheric (and hydrological) modelling (WG-1), between atmospheric and hydrologic modelling (WG-2) and between hydrologic modelling and end-users (WG-3).This paper summarizes the COST 731 activities and its context, provides a review of the recent progress made in dealing with uncertainties in flood forecasting, and sets the scene for the papers of this Thematic Issue. In particular, a bibliometric analysis highlights the strong recent increase in addressing the uncertainty analysis in flood forecasting from an integrated perspective. Such a perspective necessarily involves the area of meteorology, hydrology, and decision making in order to take operational advantage of the scientific progress, an aspect in which COST 731 is successfully contributing to furthering the flood damage mitigation capabilities in Europe. © 2010 Elsevier B.V.
Berto D.,European Commission - Joint Research Center Ispra |
Rampazzo F.,European Commission - Joint Research Center Ispra |
Noventa S.,European Commission - Joint Research Center Ispra |
Cacciatore F.,European Commission - Joint Research Center Ispra |
And 4 more authors.
Estuarine, Coastal and Shelf Science | Year: 2013
Complex environments, such as transitional waters, are characterized by several sources of particulate organic matter (POM). The analyses of stable isotopes, δ13C and δ15N, are usually used to discriminate between allochthonous and autochthonous POM. This study aimed to characterize the nature of POM through the stable isotopic analysis for the first time in the Venice lagoon. Water samples were seasonally collected during 2011 and 2012 at 28 stations during the monitoring program for the accomplishment of the objectives of the Water Framework Directive (WFD, Directive, 2000/60/CE). Dissolved nutrient concentrations, chlorophyll a, total suspended solids were determined and POM was characterized through δ13C, δ15N and C/N molar ratio. The results showed mixed sources (autochthonous and allochthonous) of POM in all lagoon stations. Nevertheless, in autumn, the enriched 13C and significantly depleted 15N POM suggested the major influence of terrestrial contribution, probably due to the increase of freshwater inputs and land runoff. Differently, in the summer period sewage discharges and biological processes as well as primary production and microbial degradation prevailed, giving a strong seasonal increase in δ15N values (up to 18.2‰).The results of PCA analysis evidenced a spatial distinction of POM load among polyhaline, euhaline not confined and euhaline confined areas, identified for the WFD accomplishment. Through the application of multiple sources mixing model (IsoSource) by means of two variables and five different POM sources, a prevalence of allochthonous sources (82%) over autochthonous was estimated in the Venice lagoon. © 2013 Elsevier Ltd.
Azzellino A.,Polytechnic of Milan |
Cevirgen S.,Polytechnic of Milan |
Giupponi C.,University of Venice |
Parati P.,ARPAV |
And 2 more authors.
Water Science and Technology | Year: 2015
In the last two decades, numerous models and modeling techniques have been developed to simulate nonpoint source pollution effects. Most models simulate the hydrological, chemical, and physical processes involved in the entrainment and transport of sediment, nutrients, and pesticides. Very often these models require a distributed modeling approach and are limited in scope by the requirement of homogeneity and by the need to manipulate extensive data sets. Physically based models are extensively used in this field as a decision support for managing the nonpoint source emissions. A common characteristic of this type of model is a demanding input of several state variables that makes the calibration and effort-costing in implementing any simulation scenario more difficult. In this study the USDA Soil and Water Assessment Tool (SWAT) was used to model the Venice Lagoon Watershed (VLW), Northern Italy. A Multi-Layer Perceptron (MLP) network was trained on SWAT simulations and used as a meta-model for scenario analysis. The MLP meta-model was successfully trained and showed an overall accuracy higher than 70% both on the training and on the evaluation set, allowing a significant simplification in conducting scenario analysis. © IWA Publishing 2015.
Parodi S.,National Research Council Italy |
Merlo D.F.,Epidemiology |
Ranucci A.,University of Piemonte Orientale |
Miligi L.,ISPO Cancer Prevention and Research Institute |
And 44 more authors.
Cancer Epidemiology | Year: 2014
Purpose: Neuroblastoma (NB) is the most common extra-cranial paediatric solid tumour. Incidence peaks in infancy, suggesting a role of in-utero and neonatal exposures but its aetiology is largely unknown. The aim of the present study is to evaluate the association between maternal characteristics and perinatal factors with the risk of NB, using data from the SETIL database. Methods: SETIL is a large Italian population-based case-control study established to evaluate several potential cancer risk factors in 0-10 year olds. Information about maternal characteristics, reproductive history, environmental and occupational exposures during pregnancy, as well as newborns' characteristics were obtained using a structured questionnaire. Extremely low frequency magnetic field (ELF-MF) home exposure was measured. The study included 1044 healthy controls and 153 NB cases, diagnosed between 1998 and 2001. Results: A twofold risk was associated to exposure in pregnancy to chemical products for domestic work and to hair dye. The risk associated with the latter was higher among 0-17 month old children (OR. =. 5.5, 95%CI: 1.0-29.3). Risk was increased for children whose mothers had suffered work related exposure in the preconception period to solvents (OR. =. 2.0 95%CI: 1.0-4.1) and in particular to aromatic hydrocarbons (OR. =. 9.2, 95%CI: 2.4-34.3). No association was observed with ELF-MF exposure. A higher risk was found among children with congenital malformations (OR. =. 4.9, 95%CI: 1.8-13.6) or neurofibromatosis (2 cases and 0 controls, p=. 0.016). Conclusions: Our study suggests maternal exposure to hair dyes and aromatic hydrocarbons plays a role and deserves further investigation. The association with congenital malformations might also be explained by over-diagnosis.External exposure, in particular during and before pregnancy might contribute to NB occurrence. © 2014 Elsevier Ltd.
Ostoich M.,Veneto Regional Environmental Prevention and Protection Agency ARPAV |
Water Science and Technology | Year: 2011
This paper discusses the problem of the identification and definition of the urban agglomerations in accordance with Directive 91/271/EC. The aim of this identification is to guarantee a satisfactory level of treatment for urban wastewaters and the achievement of the quality objectives for water bodies. The methodology employed, taking into account the existing planning tools in the water service sector, has been based on official national census data, on the Water Protection Plan, on the predictions of Water Service Plans prepared by each Water Authority and on detailed indications provided by the Authorities themselves. The proposed approach, obtained with geographic information systems applications and the calculation of pollution loads, is described and tested in the Veneto region, Italy. In the final part of the paper some considerations on the results obtained are presented and discussed. © IWA Publishing 2011.