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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 1
Hydrol. Earth Syst. Sci., 12, 177–191, 2008
https://doi.org/10.5194/hess-12-177-2008
© Author(s) 2008. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.
Hydrol. Earth Syst. Sci., 12, 177–191, 2008
https://doi.org/10.5194/hess-12-177-2008
© Author(s) 2008. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  31 Jan 2008

31 Jan 2008

Estimating the suspended sediment yield in a river network by means of geomorphic parameters and regression relationships

S. Grauso1, G. Fattoruso2, C. Crocetti3, and A. Montanari3 S. Grauso et al.
  • 1Dipartimento Ambiente, Cambiamenti Globali e Sviluppo Sostenibile, ENEA Centro Ricerche Casaccia, Roma, Italy
  • 2Dipartimento Ambiente, Cambiamenti Globali e Sviluppo Sostenibile, ENEA Centro Ricerche Portici (Napoli), Italy
  • 3Faculty of Engineering, University of Bologna, Italy

Abstract. An application of regression relationships depending on geomorphic parameters is proposed to predict the amount of the average annual suspended sediment yield at different sections of the drainage network. Simple and multiple regression relationships, utilising the drainage density and the hierarchical anomaly index as independent variables, based on data from 20 river basins of different size located in Italy, are here tested. An application is also shown for a small river basin located in central Italy where it is possible to compare the obtained suspended sediment yield estimates with reservoirs siltation data. The results confirm the potential applicability of regression equations for estimating the suspended sediment yield depending on the topological behaviours of the river network. A discussion of the reliability of the method for ungauged basins is also provided, which puts in light the necessity of additional tests to support the application of the approach to small size watersheds.

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