Information on rates of soil loss and associated rates of soil redistribution are seen as an important requirement for effective environmental management. The use of the fallout radionuclides caesium-137 (137Cs) and excess lead-210 (210Pbex) to document rates of soil and sediment redistribution in the landscape has attracted increasing attention in recent years. A detailed investigation of sediment and sediment associated 137Cs and 210Pbex fluxes has been initiated in two experimental catchments (approx. 1.5 ha in size) located in southern Italy. For both catchments, information on the sediment and radionuclide fluxes associated with 50 individual storm events has been assembled for the period 2005-2011. This measurement programme has identified a number of differences in the erosional response on the two catchments and provides a useful demonstration of the further potential for using 137Cs and 210Pbex measurements to shed light on the internal functioning of a catchment, in terms of sediment mobilization and delivery
Informazioni sui livelli di perdita del suolo e sui relativi tassi di ridistribuzione sono considerate di grande importanza per un'efficace gestione ambientale. L'utilizzo della ricaduta di radionuclidi quali il Cesio - 137 (137 Cs) ed il Piombo - 210 (210 Pbex), per documentare i livelli di perdita del suolo e di ridistribuzione dei sedimenti, ha stimolato una crescente attenzione in questi ultimi anni. Uno studio approfondito dei sedimenti e dei relativi flussi associato all'applicazione delle tecniche del 137 Cs e del 210 Pbex è stato avviato in due bacini sperimentali, di 1.5 ettari di superficie ciascuno, localizzati in Italia meridionale. Per entrambi i bacini, informazioni sui sedimenti e sui flussi dei radionuclidi associati a 50 eventi meteorici, sono state abbinate per il periodo 2005-2011. Questo programma di misure ha evidenziato numerose differenze nella risposta erosiva di due bacini e fornisce un'utile dimostrazione delle ulteriori potenzialità nell'utilizzare le misure di 137 Cs e di 210 Pbex per comprendere il funzionamento interno di un bacino in termini di mobilizzazione e di produzione dei sedimenti
Further investigation of the relationship between Cs-137 and Pb-210(ex) flux and sediment output from two small experimental catchments in Calabria, southern Italy
PAOLO PORTO;GIOVANNI CALLEGARI;
2012
Abstract
Information on rates of soil loss and associated rates of soil redistribution are seen as an important requirement for effective environmental management. The use of the fallout radionuclides caesium-137 (137Cs) and excess lead-210 (210Pbex) to document rates of soil and sediment redistribution in the landscape has attracted increasing attention in recent years. A detailed investigation of sediment and sediment associated 137Cs and 210Pbex fluxes has been initiated in two experimental catchments (approx. 1.5 ha in size) located in southern Italy. For both catchments, information on the sediment and radionuclide fluxes associated with 50 individual storm events has been assembled for the period 2005-2011. This measurement programme has identified a number of differences in the erosional response on the two catchments and provides a useful demonstration of the further potential for using 137Cs and 210Pbex measurements to shed light on the internal functioning of a catchment, in terms of sediment mobilization and deliveryFile | Dimensione | Formato | |
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Descrizione: FURTHER INVESTIGATION OF THE RELATIONSHIP BETWEEN 137CS AND 210PBEX FLUX AND SEDIMENT OUTPUT FROM TWO SMALL EXPERIMENTAL CATCHMENTS IN CALABRIA
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