Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | A probabilistic methodology to assess the risk of groundwater quality degradation |
| Abstract | An approach to assess the risk of groundwater quality degradation with regard to fixed standards, based on Disjunctive Kriging (DK) is presented. The DK allows one to evaluate the Conditional Probability (CP) to override a given threshold of concentration of a pollutant at a given time, and at a generic point in a considered groundwater system. The result of such investigation over the considered area can be plotted in form of maps of spatial risk. By repeating this analysis at different times, several spatial risk maps will be produced, one for each considered time. By means of non-parametric statistics the temporal trend of the CPs can be evaluated at every point of the considered area. The trend index, assessed by means of a sort of classification of the trend values obtained as described above, can be superimposed on the most recent values of the spatial risk (i.e.: the most recent values of probability). Consequently a classification of the risk of groundwater quality degradation results with which to weigh both the spatial distribution and the temporal behaviour of the probability to exceed a given standard threshold. The methodology has been applied to values of nitrate concentration sampled in the monitoring well network of the Modena plain, northern Italy. This area is characterised by intensive agricultural exploitation and hog breeding along with industrial and civil developments. The influence of agriculture on groundwater results in a high nitrate pollution that limits its use for potable purposes |
| Source | Environmental monitoring and assessment (Print) 79 (1), pp. 57–74 |
| Keywords | Groundwater qualityGroundwater managementDisjunctive KrigingConditional ProbabilityRisk |
| Journal | Environmental monitoring and assessment (Print) |
| Editor | Kluwer Academic Publishers, London, Paesi Bassi |
| Year | 2002 |
| Type | Articolo in rivista |
| DOI | 10.1023/A:1020033808025 |
| Authors | Passarella G., Vurro M., D'Agostino V., Giuliano G., Barcelona M.J. |
| Text | 42081 2002 10.1023/A 1020033808025 ISI Web of Science WOS 000177822700005 Scopus 2 s2.0 0036789140 PubMed 12381023 Groundwater quality Groundwater management Disjunctive Kriging Conditional Probability Risk A probabilistic methodology to assess the risk of groundwater quality degradation Passarella G., Vurro M., D Agostino V., Giuliano G., Barcelona M.J. Passarella G., Vurro M. Water Research Institute CNR, V.le De Blasio, 5 70123 Bari Italy DAgostino V. Tecnopolis NOVUS ORTUS, s.s. Casamassima, Valenzano Bari Italy Giuliano G. Water Research Institute CNR, Via Reno, 1 00186 Rome Italy Barcelona M.J. University of Michigan Department of Civil and Environmental Engineering, 1223 IST bldg., 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109 2099 USA An approach to assess the risk of groundwater quality degradation with regard to fixed standards, based on Disjunctive Kriging DK is presented. The DK allows one to evaluate the Conditional Probability CP to override a given threshold of concentration of a pollutant at a given time, and at a generic point in a considered groundwater system. The result of such investigation over the considered area can be plotted in form of maps of spatial risk. By repeating this analysis at different times, several spatial risk maps will be produced, one for each considered time. By means of non parametric statistics the temporal trend of the CPs can be evaluated at every point of the considered area. The trend index, assessed by means of a sort of classification of the trend values obtained as described above, can be superimposed on the most recent values of the spatial risk i.e. the most recent values of probability . Consequently a classification of the risk of groundwater quality degradation results with which to weigh both the spatial distribution and the temporal behaviour of the probability to exceed a given standard threshold. The methodology has been applied to values of nitrate concentration sampled in the monitoring well network of the Modena plain, northern Italy. This area is characterised by intensive agricultural exploitation and hog breeding along with industrial and civil developments. The influence of agriculture on groundwater results in a high nitrate pollution that limits its use for potable purposes 79 http //dx.doi.org/10.1023/A 1020033808025 Articolo su rivista internazionale con IF Received 14 March 2001; accepted 25 October 2001 author for correspondence, e mail passarella@area.ba.cnr.it A probabilistic methodology to assess the risk of groundwater quality degradation Articolo su rivista internazionale con IF Received 14 March 2001; accepted 25 October 2001 author for correspondence, e mail passarella@area.ba.cnr.it INT_Articolo_in_Rivista_J_05.pdf Articolo in rivista Kluwer Academic Publishers 0167 6369 Environmental monitoring and assessment Print Environmental monitoring and assessment Print Environ. monit. assess. Print Environmental monitoring and assessment. Print giuseppe.passarella PASSARELLA GIUSEPPE GIULIANO GIUSEPPE GENNARO michele.vurro VURRO MICHELE TA.P04.005.008 Integrazione di metodologie per il monitoraggio e la modellizzazione per la gestione delle risorse idriche |