Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Temporal variability of suspended sediment transport and rating curves in a Mediterranean river basin: The Celone (SE Italy) |
| Abstract | In the Mediterranean region suspended sediment transport is the predominant process in sediment export in most river basins. The aim of this paper is to analyze suspended sediment variability over a period of 12 months in the Celone river, a temporary river located in the Puglia region (SE-Italy), and to evaluate sediment rating curves for estimating suspended sediment concentrations for subsequent load calculations. Similarly to most temporary rivers, the Celone river shows relevant differences among mean daily flows and the extreme instan-taneous flows during floods. To take into account these peculiarities, the rating curves were developed as a func-tion of hydrological conditions: high, normal and low flows. Continuous measures of streamflow and frequent samplings of suspended solid concentrations (SSCs) during flood events, normal flow and low flow were used. The plot of the SSC against discharge takes the form of a hysteresis loop. Clockwise, anticlockwise and mixed-shaped loops were observed. Suspended sediment yield was found to be in the range of 250-384 t km -2 y -1 . The results show that about 94% of the total suspended materials were transported during the high flow regime, while less than 0.1% were under low flow conditions. Moreover, it was observed that 90% of the total annual suspended loads were moved between November to May. Flash floods that occur in summer exhibit the highest values of SSC. The proposed method, which was based on sediment rating curves, has proved to be valuable to generate SSC data for high and normal flows although it tends to underestimate the highest values. It can repre-sent a useful tool for water resource managers who need a quick and inexpensive method, specific for temporary rivers, to evaluate suspended sediment yield. |
| Source | Catena (Cremling.) 2 (128), pp. 135–143 |
| Keywords | Suspended sediment load;Hysteresystemporary riversediment rating curvesmonitoring |
| Journal | Catena (Cremling.) |
| Editor | Elsevier Science, Cremlingen, Paesi Bassi |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.catena.2014.09.020 |
| Authors | A M De Girolamo, G Pappagallo, A Lo Porto |
| Text | 303171 2015 10.1016/j.catena.2014.09.020 Scopus 2 s2.0 84922311199 ISI Web of Science WOS WOS 000351806600011 Suspended sediment load; Hysteresys temporary river sediment rating curves monitoring Temporal variability of suspended sediment transport and rating curves in a Mediterranean river basin The Celone SE Italy A M De Girolamo, G Pappagallo, A Lo Porto Istituto di Ricerca sulle Acque IRSA CNR In the Mediterranean region suspended sediment transport is the predominant process in sediment export in most river basins. The aim of this paper is to analyze suspended sediment variability over a period of 12 months in the Celone river, a temporary river located in the Puglia region SE Italy , and to evaluate sediment rating curves for estimating suspended sediment concentrations for subsequent load calculations. Similarly to most temporary rivers, the Celone river shows relevant differences among mean daily flows and the extreme instan taneous flows during floods. To take into account these peculiarities, the rating curves were developed as a func tion of hydrological conditions high, normal and low flows. Continuous measures of streamflow and frequent samplings of suspended solid concentrations SSCs during flood events, normal flow and low flow were used. The plot of the SSC against discharge takes the form of a hysteresis loop. Clockwise, anticlockwise and mixed shaped loops were observed. Suspended sediment yield was found to be in the range of 250 384 t km 2 y 1 . The results show that about 94% of the total suspended materials were transported during the high flow regime, while less than 0.1% were under low flow conditions. Moreover, it was observed that 90% of the total annual suspended loads were moved between November to May. Flash floods that occur in summer exhibit the highest values of SSC. The proposed method, which was based on sediment rating curves, has proved to be valuable to generate SSC data for high and normal flows although it tends to underestimate the highest values. It can repre sent a useful tool for water resource managers who need a quick and inexpensive method, specific for temporary rivers, to evaluate suspended sediment yield. 2 Published version https //www.sciencedirect.com/science/article/abs/pii/S0341816215000090 Temporal variability of suspended sediment transport and rating curves in a Mediterranean river basin The Celone SE Italy The aim of this paper is to analyze suspended sediment variability over a period of 12months in the Celone river, a temporary river located in the Puglia region SE Italy , and to evaluate sediment rating curves for estimating suspended sediment concentrations for subsequent load calculations. Prodotto 8_De Girolamo.pdf Articolo in rivista Elsevier Science 0341 8162 Catena Cremling. Catena Cremling. Catena Cremling. Catena. Cremling. Catena Amsterdam Cremling. Catena Giessen Cremling. antonio.loporto LO PORTO ANTONIO annamaria.degirolamo DE GIROLAMO ANNA MARIA giuseppe.pappagallo PAPPAGALLO GIUSEPPE MIRAGE Mediterranean Intermittent River Management TA.P04.005.006 Gestione a scala di bacino delle risorse idriche e sostenibilita dell uso irriguo in agricoltura |