Bedload Transport Processes in a Coastal Sand-Bed River: The Study Case of Fiumi Uniti River in the Northern Adriatic

  • Silvia CilliEmail author
  • Paolo Billi
  • Leonardo Schippa
  • Edoardo Grottoli
  • Paolo Ciavola
Part of the Springer INdAM Series book series (SINDAMS, volume 38)


Over the last decades, most of the Emilia-Romagna (Italy) beaches have been affected by marked erosion that is still progressing, which is primarily due to the reduction of sediment supply by the local rivers. In addition to larger fluvial systems, the role of small rivers has been recognized as important in contributing to both beach stability and changes. Bedload measurements were carried out by previous authors in 2005–2006 but, in order to widen the data set of river sediment supply for the whole region, a new bedload measurement campaign was performed in 2017 on the Fiumi Uniti River, a typical example of a small river system whose sediment supply variations substantially influence the stability of the beaches adjoining its mouth. Marked changes were observed in the bedload transport rates and bed material grain size between the two sampling campaigns of 2005/2006 and 2017. The threshold conditions for bed particle entrainment are analysed by means of the Shields classical criterion and other approaches. The results indicate that all these criteria are unable to predict the actual value, except for Carling and Bagnold criteria. This result has large implications in the assessment of bedload yield in sand-bed rivers.


Bedload transport Flood measurements Threshold condition Critical shear stress 


  1. 1.
    Amorosi, A., Centineo, M.C., Dinelli, E., Lucchini, F., Tateo, F.: Geochemical and mineralogical variations as indicators of provenance changes in Late Quaternary deposits of SE Po Plain. Sediment. Geol. 151, 273–292 (2002)CrossRefGoogle Scholar
  2. 2.
    Anthony, E.J.: The Human influence on the Mediterranean coast over the last 200 years: a brief appraisal from a geomorphological perspective. Geomorphologie 20(3), 219–226 (2014)CrossRefGoogle Scholar
  3. 3.
    Antolini, G., Auteri, L., Pavan, V., Tomei, F., Tomozeiu, R., Marletto, V.: A daily high-resolution gridded climatic data set for Emilia-Romagna, Italy, during 1961–2010. Int. J. Climatol. 36, 1970–1986 (2016)CrossRefGoogle Scholar
  4. 4.
    Bagnold, R.A.: An empirical correlation of bedload transport rates in flumes and natural rivers. Proc. R. Soc. Lond. A372, 453–473 (1980)Google Scholar
  5. 5.
    Billi, P., Salemi, E.: Misura delle portate solide in sospensione al fondo del F. Reno. Arpa Rivista, supplemento al n. 6, 8–15 (2004)Google Scholar
  6. 6.
    Billi, P., Salemi, E., Preciso, E., Ciavola, P., Armaroli, C.: Field measurement of bedload in a sand-bed river supplying a sediment starving beach. Z. Geomorphol. 61(3), 207–223 (2017)CrossRefGoogle Scholar
  7. 7.
    Brownlie, W.R.: Prediction of flow depth and sediment discharge in open channels. Report No. KH-R-43A, p. 232. California Institute of Technology, W. M. Keck Laboratory, Pasedena (1981)Google Scholar
  8. 8.
    Carling, P.A.: Threshold of coarse sediment transport in broad an narrow natural streams. Earth Surf. Process. Landf. 8, 1–18 (1983)CrossRefGoogle Scholar
  9. 9.
    Ciavola, P., Billi, P., Armaroli, C., Preciso, E., Salemi, E., Balouin, Y.: Morphodynamics of the Bevano Stream outlet: the role of bedload yield. Valutazione della morfodinamica di foce del Torrente Bevano (RA): il ruolo del trasporto solido di fondo. Geologia Tecnica e Ambientale 1, 41–57 (2005)Google Scholar
  10. 10.
    Ciavola, P., Salemi, E., Billi, P.: Sediment supply and morphological evolution of a small river mouth (Fiumi Uniti, Ravenna, Italy): should river management be storm-driven? In: Proceedings of the China-Italy Bilateral Symposium on the Coastal Zone and Continental Shelf Evolution Trend, October 5–8, 2010, Bologna, Italy (2010)Google Scholar
  11. 11.
    Costa, J.E.: Paleohydraulic reconstruction of flash-flood peaks from boulder deposits in the Colorado Front Range. Bull. Geol. Soc. Am. 94, 986–1004 (1983)CrossRefGoogle Scholar
  12. 12.
    Emmet, W.W.: A field calibration of sediment-trapping characteristics of the Helley-Smith bed-load sampler. USDI, GS Open File Report 79, 79–411 (1979)Google Scholar
  13. 13.
    Grant, G.E., Schmidt, J.C., Lewis, S.L.: A geological framework for interpreting downstream effects of dams on rivers. In: O’Connor, J.E., Grant, G.E. (eds.) A Peculiar River: Geology, Geomorphology, and Hydrology of the Deschutes River, Oregon, pp. 203–219. AGU, Washington DC (2003)Google Scholar
  14. 14.
    Hammond, F.D.C., Heathershaw, A.D., Langhorne, D.N.: A comparison between Shields’ threshold criterion and the movement of loosely packed gravel in a tidal channel. Sedimentology 31, 51–62 (1984)CrossRefGoogle Scholar
  15. 15.
    Herschy, R.W.: Streamflow Measurement. Elsevier, London (1985)CrossRefGoogle Scholar
  16. 16.
    Hickin, E.J.: Rivers. (2010), pp. 70–107
  17. 17.
    Hooke, J.M.: Human impacts on fluvial systems in the Mediterranean region. Geomorphology 79, 311–335 (2006)CrossRefGoogle Scholar
  18. 18.
    Inman, D.L., Jenkins, S.A.: Climate change and episodicity of sediment flux of small California rivers. J. Geol. 107, 251–270 (1999)CrossRefGoogle Scholar
  19. 19.
    Julien, P.Y.: Erosion and Sedimentation. Cambridge University Press, Cambridge (1995)CrossRefGoogle Scholar
  20. 20.
    Kondolf, G.M.: Hungry water: effects of dams and gravel mining on river channels. Environ. Manag. 21(4), 533–551 (1997)CrossRefGoogle Scholar
  21. 21.
    Liebault, F., Piegay, H.: Assessment of channel changes due to long-term bedload supply decrease, Roubion River, France. Geomorphology 36, 167–186 (2001)CrossRefGoogle Scholar
  22. 22.
    Mennella, C.: Il clima d’Italia, vol. II, F.lli Conte Editori, Napoli, Italia (1972)Google Scholar
  23. 23.
    Parker, C., Clifford, N.J., Thorne, C.R.: Understanding the influence of slope on the threshold of coarse grain motion: revisiting critical stream power. Geomorphology 126, 51–65 (2011)CrossRefGoogle Scholar
  24. 24.
    Shields, A.: Application of similarity principles and turbulence research to bed-load movement. California Institute of Technology, Pasadena (Translated from German) (1936)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Silvia Cilli
    • 1
    Email author
  • Paolo Billi
    • 2
  • Leonardo Schippa
    • 3
  • Edoardo Grottoli
    • 1
  • Paolo Ciavola
    • 1
  1. 1.Department of Physics and Earth SciencesUniversity of FerraraFerraraItaly
  2. 2.IPDRETottori UniversityTottoriJapan
  3. 3.Department of EngineeringUniversity of FerraraFerraraItaly

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