Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Mapping the hazard of groundwater pollution by disjunctive kriging |
| Abstract | The hazard of an event that is detrimental for a natural system can be combined with the vulnerability of that system to obtain the risk. In this paper an approach to assess the level of spatial hazard for groundwater quality based on Disjunctive Kriging (DK) is presented. The DK offers the possibility to evaluate, at a fixed time, the Conditional Probability (CP) for a target pollutant (i.e. a chemical parameter sampled in wells) to override a given threshold (i.e. concentration value) in any point of a study area. Varying t, different hazard maps can be plotted. A non parametrical statistics allows to evaluate the temporal trend of the CPs. The map of the trend index can be combined by the most recent map of the spatial hazard. The effective levels of the space-time hazard will result in a classification according to the rules coming from a tabular combination. As a case study, effective hazard levels maps of groundwater quality have been plotted for the aquifer of the plain of Modena, Northern Italy. Intensive agriculture and pig breeding take place in the study area along with industrial and civil settlements. The influence of the agriculture on groundwater results in high nitrate pollution that limit the use of such a resource for drinking water supply. |
| Source | IAMG'99 - The Fifth Annual Conference Of The International Association For Mathematical Geology, Trondheim, 6-11 Agosto 1999 |
| Year | 1999 |
| Type | Contributo in atti di convegno |
| Authors | D'Agostino V; Passarella G; Giuliano G; Vurro M |
| Text | 213274 1999 Mapping the hazard of groundwater pollution by disjunctive kriging D Agostino V; Passarella G; Giuliano G; Vurro M D Agostino V. , Passarella G. , Vurro M. , Giuliano G. , Tecnopolis Novus Ortus, Valenzano Italy Istituto di Ricerca Sulle Acque CNR, Roma Italy Istituto di Ricerca Sulle Acque CNR, via F. De Blasio 5, 70123 Bari Italy The hazard of an event that is detrimental for a natural system can be combined with the vulnerability of that system to obtain the risk. In this paper an approach to assess the level of spatial hazard for groundwater quality based on Disjunctive Kriging DK is presented. The DK offers the possibility to evaluate, at a fixed time, the Conditional Probability CP for a target pollutant i.e. a chemical parameter sampled in wells to override a given threshold i.e. concentration value in any point of a study area. Varying t, different hazard maps can be plotted. A non parametrical statistics allows to evaluate the temporal trend of the CPs. The map of the trend index can be combined by the most recent map of the spatial hazard. The effective levels of the space time hazard will result in a classification according to the rules coming from a tabular combination. As a case study, effective hazard levels maps of groundwater quality have been plotted for the aquifer of the plain of Modena, Northern Italy. Intensive agriculture and pig breeding take place in the study area along with industrial and civil settlements. The influence of the agriculture on groundwater results in high nitrate pollution that limit the use of such a resource for drinking water supply. Proceedings of the 5th Annual Conference of the International Association for Mathematical Geology Lippard S J; Nress A; Sinding Larsen R 82 995162 1 8 Pubblicazione in atti di convegno con ISBN. IAMG 99 The Fifth Annual Conference Of The International Association For Mathematical Geology Trondheim 6 11 Agosto 1999 Internazionale Contributo Mapping the hazard of groundwater pollution by disjunctive kriging Pubblicazione in atti di convegno con ISBN. INT_Contributo_in_atti_Convegno_10.pdf Contributo in atti di convegno 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 |